This patch adds of_clk_get_by_clkspec() helper function, which does only
a struct clk lookup from the clock providers. It is used in the subsequent
patch where parsing of a clock from device tree and the lookup from
providers needed to be split.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
- S3C2412, S3C2413, S3C2416 and S3C2443 to use CCF
- S3C2410, S3C2440, S3C2442 to use CCF
- Remove legacy samsung clock from mach-s3c24xx/
- Some of them are missed from previous pull-request
- Clock related sutff got ack from Mike and Tomasz
- Created the last commit due to missing changes
during re-sorting because this branch is provided
as a base to samsung clk tree.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=HX4t
-----END PGP SIGNATURE-----
Merge tag 's3c24xx-clk' of http://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/cleanup
Merge "Samsung S3C24XX updates for 3.16" from Kukjin Kim:
Samsung S3C24XX to use the common clock framework
- S3C2412, S3C2413, S3C2416 and S3C2443 to use CCF
- S3C2410, S3C2440, S3C2442 to use CCF
- Remove legacy samsung clock from mach-s3c24xx/
- Some of them are missed from previous pull-request
- Clock related sutff got ack from Mike and Tomasz
- Created the last commit due to missing changes
during re-sorting because this branch is provided
as a base to samsung clk tree.
* tag 's3c24xx-clk' of http://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: (23 commits)
ARM: S3C24XX: fix merge conflict
ARM: S3C24XX: remove SAMSUNG_CLOCK remnants after ccf conversion
ARM: S3C24XX: remove legacy clock code
ARM: S3C24XX: convert s3c2410 to common clock framework
ARM: S3C24XX: convert s3c2440 and s3c2442 to common clock framework
ARM: S3C24XX: add platform code for conversion to the common clock framework
clk: samsung: add clock controller driver for s3c2410, s3c2440 and s3c2442
dt-bindings: add documentation for s3c2410 clock controller
ARM: S3C24XX: enable usage of common dclk if common clock framework is enabled
clk: samsung: add clock driver for external clock outputs
ARM: S3C24XX: cpufreq-utils: don't write raw values to MPLLCON when using ccf
ARM: S3C24XX: convert s3c2412 to common clock framework
clk: samsung: add clock controller driver for s3c2412
dt-bindings: add documentation for s3c2412 clock controller
clk: samsung: add plls used by the early s3c24xx cpus
ARM: S3C24XX: only store clock registers when old clock code is active
ARM: S3C24XX: Convert s3c2416 and s3c2443 to common clock framework
ARM: dts: add clock data for s3c2416
ARM: S3C24XX: prevent conflicts between ccf and non-ccf s3c24xx-socs
clk: samsung: add clock-driver for s3c2416, s3c2443 and s3c2450
...
Signed-off-by: Olof Johansson <olof@lixom.net>
The IM-PD1 PrimeCells all have pclk assignments though this clock
cannot be controlled, and we need to provide this as a dummy
clock for the PL061 GPIO driver to probe, so let's assign it to
all the cells on the board.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
regressions. As usual most fixes are for platform-specific clock
drivers, but there are also two fixes to the clk core after recent
changes to the way that clock unregistration is handled.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=JwFU
-----END PGP SIGNATURE-----
Merge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux
Pull clock framework fixes from Mike Turquette:
"Clock framework and driver fixes, all of which fix user-visible
regressions.
As usual most fixes are for platform-specific clock drivers, but there
are also two fixes to the clk core after recent changes to the way
that clock unregistration is handled"
* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux:
clk: tegra: Fix wrong value written to PLLE_AUX
clk: shmobile: clk-mstp: change to using clock-indices
clk: Fix slab corruption in clk_unregister()
clk: Fix double free due to devm_clk_register()
clk: socfpga: fix clock driver for 3.15
clk: divider: Fix best div calculation for power-of-two and table dividers
clk: bcm281xx: don't use unnamed structs or unions
With common OF_DECLARE macros, a semi-colon will be required for
CLK_OF_DECLARE. Add the missing semi-colon to ti,gate-clock.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Adding function type checking to CLK_OF_DECLARE found a type mismatch with
sunxi_init_clocks. The function takes a single struct device_node
parameter.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Cc: "Emilio López" <emilio@elopez.com.ar>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Use for_each_matching_node_and_match instead of for_each_matching_node plus
of_match_node to avoid searching the DT twice for each node.
The sunxi DT scanning code should really be re-worked rather than have
its own private matching infrastructure. It is working around needing a
function pointer and a data pointer for each compatible match.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: "Emilio López" <emilio@elopez.com.ar>
Acked-by: Mike Turquette <mturquette@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Adding function type checking to CLK_OF_DECLARE found a type mismatch with
rk2928_gate_clk_init. The function only takes a single struct device_node
parameter.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Fractional divider clocks are fairly common. This adds basic
type for them.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Exynos5800 clock structure is mostly similar to 5420 with only
a small delta changes. So the 5420 clock file is re-used for
5800 also. The common clocks for both are seggreagated and few
clocks which are different for both are separately initialized.
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
When consolidating the msm8660 GCC probe code I forgot to keep
around these temporary clock registrations. Put them back so the
clock tree is not entirely orphaned.
Fixes: 49fc825f0c (clk: qcom: Consolidate common probe code)
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The value written to PLLE_AUX was incorrect due to a wrong variable
being used. Without this fix SATA does not work.
Cc: stable@vger.kernel.org
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Tested-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: improved changelog]
Move the Kconfig entry for Versatile (& Express) clock drivers
into a separate file and add individual options for sp810
and vexpress_osc drivers, as they are optional in some
configurations and may have separate dependencies.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Components of the Versatile Express platform (configuration
microcontrollers on motherboard and daughterboards in particular)
talk to each other over a custom configuration bus. They
provide miscellaneous functions (from clock generator control
to energy sensors) which are represented as platform devices
(and Device Tree nodes). The transactions on the bus can
be generated by different "bridges" in the system, some
of which are universal for the whole platform (for the price
of high transfer latencies), others restricted to a subsystem
(but much faster).
Until now drivers for such functions were using custom "func"
API, which is being replaced in this patch by regmap calls.
This required:
* a rework (and move to drivers/bus directory, as suggested
by Samuel and Arnd) of the config bus core, which is much
simpler now and uses device model infrastructure (class)
to keep track of the bridges; non-DT case (soon to be
retired anyway) is simply covered by a special device
registration function
* the new config-bus driver also takes over device population,
so there is no need for special matching table for
of_platform_populate nor "simple-bus" hack in the arm64
model dtsi file (relevant bindings documentation has
been updated); this allows all the vexpress devices
fit into normal device model, making it possible
to remove plenty of early inits and other hacks in
the near future
* adaptation of the syscfg bridge implementation in the
sysreg driver, again making it much simpler; there is
a special case of the "energy" function spanning two
registers, where they should be both defined in the tree
now, but backward compatibility is maintained in the code
* modification of the relevant drivers:
* hwmon - just a straight-forward API change
* power/reset driver - API change
* regulator - API change plus error handling
simplification
* osc clock driver - this one required larger rework
in order to turn in into a standard platform driver
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Acked-by: Mark Brown <broonie@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Mike Turquette <mturquette@linaro.org>
The impd1 code on mach-integrator can be a loadable module,
so we have to export icst_clk_register, integrator_impd1_clk_init
and integrator_impd1_clk_exit.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
__clk_get_hw is supposed to be used by clk providers, not clk consumers.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This patch add new the clock drvier of Exynos3250 SoC based on Cortex-A7
using common clock framework. The CMU (Clock Management Unit) of Exynos3250
control PLLs(Phase Locked Loops) and generate system clocks for CPU, buses,
and function clocks for individual IPs.
The CMU of Exynos3250 includes following clock doamins:
- CPU block for Cortex-A7 MPCore processor
- LEFTBUS/RIGHTBUS block
- TOP block for G3D/MFC/LCD0/ISP/CAM/FSYS/MFC/PERIL/PERIR
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Hyunhee Kim <hyunhee.kim@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Signed-off-by: YoungJun Cho <yj44.cho@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
This patch replaces PLAT_SAMSUNG with COMMON_CLK_SAMSUNG for Samsung
common clock support. Any Samsung SoC want to use Samsung common clock
infrastructure can simply select COMMON_CLK_SAMSUNG.
CC: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch moves S3C24XX specific clock Kconfig options into
"clk/samsung/Kconfig" and also removes COMMON_CLK selection from
"mach-s3c24xx/Kconfig" as S3C24XX_COMMON_CLK is selecting it's dependency.
CC: Ben Dooks <ben-linux@fluff.org>
CC: Kukjin Kim <kgene.kim@samsung.com>
CC: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds new Kconfig file for adding new COMMON_CLK_SAMSUNG option.
Samsung platforms can select this for using common clock infrastructure.
CC: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds more register offsets to the list for
preserving their values during S2R.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds some missing miscellaneous clocks specific
to exynos5420.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds the missing MAU block specific clocks.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch corrects the wrong parent-child relationship
between sysmmu-mfc clocks.
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds more clocks from FSYS and FSYS2 blocks
and uses GATE_IP_* registers for gating IPs.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch fixes some parent-child relationships according
to the latest datasheet and adds more clocks related to
PERIS and GEN blocks.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch includes,
1] renaming of the HSI2C clocks
2] renaming of spi clocks according to the datasheet
3] fixes for child-parent relationships
4] adding of more clocks related to PERIC block
5] use GATE_IP_* offsets instead of GATE_BUS_*
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch corrects some child-parent clock relationships,
and updates the clocks according to the latest datasheet.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds missing clocks of G2D block. It also removes
the aclkg3d alias from G3D block clocks.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds the missing GSCL and MSCL block clocks
and corrects some wrong parent-child relationships.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds minimum set of clocks to gate ISP block for
power saving.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch renames the mux parent arrays as per the naming
convension followed by the other exynos specific clock drivers.
And it also renames "mout_cpu_kfc" clock to "mout_kfc".
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Adds IDs for the clocks needed by the ARM Mali GPU
in exynos5420.
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Export sclk_hdmiphy clock to be usable from DT.
Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds the required clocks for ARM Mali IP
in Exynos5250.
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
[t.figa: Changed clock ID to avoid conflict with CLK_SSS]
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Exynos4210 and Exynos4x12 SoCs have the PL330 MDMA IP block clock
defined exactly in same way in documentation. Using different
names for these clocks is a bit misleading. Since there is no users
of CLK_MDMA2 in existing dts files this patch drops CLK_MDMA2 and
replaces it with CLK_MDMA in the driver. This ensures PL330 MDMA
has correct clock assigned on Exynos4x12 SoCs.
Suggested-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
When compiled using ARM64 cross compiler, gcc complains as
drivers/clk/samsung/clk.c:293:18:
warning: cast from pointer to integer of different size
[-Wpointer-to-int-cast]
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
This patch adds gating clock for SSS(Security SubSystem)
module on Exynos5250/5420.
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
[t.figa: Fixed sort order and group name.]
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Before this patch, the driver was simply zeroing the clock table, which
is incorrect, because invalid clock numbers returned NULL instead of
error pointers. This patch fixes this by changing the driver to
initialize the array with PTR_ERR(-ENOENT).
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Add support for exynos5260 clocks in clock driver.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Add support for pll2650xx in samsung pll file. This PLL variant
is close to pll36xx but uses CON2 registers instead of CON1.
Aud_pll in Exynos5260 is pll2650xx and uses this code.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Reviewed-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
exynos5260 use pll2550xx and it has different bit fields
for P,M,S values as compared to pll2550. Support for
pll2550xx is added here.
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Samsung CCF helper functions do not provide support to
register multiple Clock Providers for a given SoC. Due to
this limitation, SoC platforms are not able to use these
helpers for registering multiple clock providers and are
forced to bypass this layer.
This layer is modified accordingly to enable the support
for multiple clock providers.
Clock file for exynos4, exynos5250, exynos5420, exynos5440,
S3c64xx, S3c24xx are also modified as per changed helper functions.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
[t.figa: Modified s3c2410 clock driver as well]
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
The R8A7779 SoC has several clocks that are too custom to be supported in a
generic driver. Those clocks are all fixed rate clocks with multiplier and
divisor set according to boot mode configuration.
Based on work for R-Car Gen2 SoCs by Laurent Pinchart.
Cc: devicetree@vger.kernel.org
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
thought to be hidden.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
iQIcBAABAgAGBQJTcQUFAAoJEBmUBAuBoyj0hFkP/2lSyq+o4swmhovXFV8xLlvg
lgIq7m7RXqc8kSbz7RhbVOmjvTr7Kb5YRBQO7mIqJQpM/4lzUrsgGc9m7LZc6Rnh
eP4Dt37gHCmacEwtjRp5nvQ5t0NaXXocctyb0LHKjuDRJlNkqd6Qcx+Lj4fXjsCf
flWAxJN2ZG5BA8m5KCWPemYjiQblQUKNphphjte1AWgvl/yyzOSLneobnfdMFbiR
jkaUBAw2vUYvz4NjJzw9f1aS8EUpc2IO6tLXERVZ7V6+rCakHK+DH1tzstlfqES0
zIdEzoV1PzBiIreptLGH9EbM8nmFIX/7whijtEvOoxkHeLPtTUnTm0Mv0KGVR5wF
k3tMPeNP0BDNJ/69nPnxbr7dSw1xkLU9UavY+/t7Jq5fAt4/DsOoPxRnbxOQI+SM
Lf3KS+j7nLQ7ueOgaB7tiDS5unNRqaY0ys0MggeA9xA544gcTf/2sg/qS9ur7PP5
jJ0yumtyunDCCI2xh0vUOipHNb0wbx9gCylgvPzatB8kDYaInOLA+ifVo9GJECd4
jdKoS848wBYZESSaiEGGL5VcLhKAhE4ycLpsWHh5wFScr+4KfBVr/vcm2cZs3XIG
ISANaRoDFOtk8jCwNw2wTveW1tLsQHFU1ldoMfFcvKzESQkoe4PM+s4waRLduPLx
3OjACqD98ydI76tNli0f
=anDE
-----END PGP SIGNATURE-----
Merge tag 'socfpga-clk-update-for-v3.16' of git://git.rocketboards.org/linux-socfpga-next into clk-next-socfpga
Adds support getting the divider registers for the MAIN PLL that was once
thought to be hidden.
With the addition of clock-indices, we need to change the renesas
clock implementation to use these instead of the local definition
of "renesas,clock-indices".
Since this will break booting with older device trees, we add a
simple auto-detection of which properties are present.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This driver can handle the clock controllers of the socs mentioned above,
as they share a common clock tree with only small differences.
The clock structure is built according to the manuals of the included
SoCs and might include changes in comparison to the previous clock
structure.
As pll-rate-tables only the 12mhz variants are currently included.
The original code was wrongly checking for 169mhz xti values [a 0 to much
at the end], so the original 16mhz pll table would have never been
included and its values are so obscure that I have no possibility to
at least check their sane-ness. When using the formula from the manual
the resulting frequency is near the table value but still slightly off.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
The C0(mpu_clk), C1(main_clk), and C2(dbg_base_clk) outputs from the main
PLL go through a pre-divider before coming into the system. These registers
were hidden for the CycloneV platform, but are now used for the ArriaV
platform.
This patch updates the clock driver to read the div-reg property for the
socfpga-periph-clk clocks. Also moves the div_mask define to clk.h for re-use.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Conflicts:
drivers/net/ethernet/altera/altera_sgdma.c
net/netlink/af_netlink.c
net/sched/cls_api.c
net/sched/sch_api.c
The netlink conflict dealt with moving to netlink_capable() and
netlink_ns_capable() in the 'net' tree vs. supporting 'tc' operations
in non-init namespaces. These were simple transformations from
netlink_capable to netlink_ns_capable.
The Altera driver conflict was simply code removal overlapping some
void pointer cast cleanups in net-next.
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds a driver for controlling the external clock outputs of
s3c24xx architectures including the dclk muxes and dividers.
The driver at the moment only supports the legacy non-dt boards using these
clock outputs. The clock-output control itself is part of the system-controller
mainly controlled by the pinctrl drivers. So it should most likely be
integrated there for dt platforms.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
AT91 slow clk is a clk multiplexer.
In some SoCs (sam9x5, sama5, sam9g45 families) this multiplexer can
choose among 2 sources: an internal RC oscillator circuit and an oscillator
using an external crystal.
In other Socs (sam9260 family) the multiplexer source is hardcoded with
the OSCSEL signal.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
AT91 main clk is a clk multiplexer and not a simple fixed rate clk as
currently implemented.
In some SoCs (sam9x5, sama5, sam9g45 families) this multiplexer can
choose among 2 sources: an internal RC oscillator circuit and an
oscillator using an external crystal.
In other Socs (sam9260, rm9200 families) the multiplexer source is
hardcoded to the external crystal oscillator.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit implements .determine_rate, so that our factor clocks can be
reparented when needed.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
cpsw_cpts_rft_clk has got the choice of 3 clocksources
-dpll_core_m4_ck
-dpll_core_m5_ck
-dpll_disp_m2_ck
By default dpll_core_m4_ck is selected, witn this as clock
source the CPTS doesnot work properly. It gives clockcheck errors
while running PTP.
clockcheck: clock jumped backward or running slower than expected!
By selecting dpll_core_m5_ck as the clocksource fixes this issue.
In AM335x dpll_core_m5_ck is the default clocksource.
Signed-off-by: George Cherian <george.cherian@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Following arm64 commit bc3ee18a7a (arm64: init: Move of_clk_init to
time_init()), vexpress_osc_of_setup() is called via of_clk_init() long
before initcalls are issued. Initialising the vexpress oscillators
requires the vespress sysregs to be already initialised, so this patch
adds an explicit call to vexpress_sysreg_of_early_init() in vexpress
oscillator setup function.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Pawel Moll <pawel.moll@arm.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Cc: Mike Turquette <mturquette@linaro.org>
The APQ8064 and MSM8960 share a significant amount of clock data and
code between the two SoCs. Rather than duplicating the data we just add
support for a unqiue APQ8064 clock table into the MSM8960 code.
For now add just enough clocks to get a basic serial port going on an
APQ8064 device.
Signed-off-by: Kumar Gala <galak@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: trivial conflict due to missing ipq8064 support]
Most of the probe code is the same between all the different
clock controllers. Consolidate the code into a common.c file.
This makes changes to the common probe parts easier and reduces
chances for bugs.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This simplifies error paths in drivers that use optional clocks
by allowing the NULL or error pointer to be passed
unconditionally.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The same if-else statement exists four times to recalculate the
rate of a clock. Consolidate this logic into a single function to
save some lines.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
We dereference clk->ops during clock registration so this check
for NULL ops can't possibly ever be true.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Define the set of CCUs and provided clocks sufficient to satisfy the
needs of all the existing clock references for BCM21664. Replace
the "fake" fixed-rate clocks used previously with "real" ones.
Note that only the minimal set of these clocks and CCUs is defined
here. More clock definitions will need to be added as required by
the addition of additional drivers.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The Broadcom 281xx clock code uses a #define for the compatible
string for it's clock control units (CCUs). Rather than defining
those in the C source file, define them in the header file that's
shared by both the code and the device tree source file (along with
all the clock ids).
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add support for clock gate hysteresis control. For now, if it's
defined for a clock, it's enabled.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add support for CCU policy engine control, and also for setting the
mask bits for bus clocks that require a policy change to get
activated. This includes adding validity checking framework for
CCUs, to validate the policy fields if defined.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Rather than "manually" setting up each CCU's clock entries at run
time, define a flexible array of generic Kona clock structures
within the CCU structure itself. Each of these entries contains
generic kona clock information (like its CCU pointer and clock
framework initialization data). Each also has a pointer to a
structure contianing clock type-dependent initialization data
(like register definitions).
Since we'll iterate over these arrays we need to be sure they have
slots for all potential clock index values. (E.g. for the root CCU
we must have at least BCM281XX_ROOT_CCU_CLOCK_COUNT slots.) To
ensure this we always define an extra entry and fill it using the
special initializer LAST_KONA_CLK.
Just about everything we need to know about a clock can be defined
statically. As a result, kona_clk_setup() can be changed to take
just a kona_clk structure as its argument, and peri_clk_setup() can
be simplified. With the information pre-defined we are also able
to handle most clock setup genericially. We can do away with the
CCU-specific callback functions that previously were needed to set
up the entries in CCU's clock array.
Move the definition of the ccu_data structure down in "clk-kona.h"
to avoid a forward dependency.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
We know up front how many CCU's we'll support, so there's no need to
allocate their data structures dynamically. Define a macro
KONA_CCU_COMMON() to simplify the initialization of many of the
fields in a ccu_data structure. Pass the address of a statically
defined CCU structure to kona_dt_ccu_setup() rather than having that
function allocate one.
We also know at build time how many clocks a given CCU will provide,
though the number of of them for each CCU is different. Record the
number of clocks we need in the CCU's clk_onecell_data struct
(which is used when we register the CCU with the common clock code
as a clock provider). Rename that struct field "clk_data" (because
"data" alone gets a little confusing).
Use the known clock count to move the allocation of each CCU's
clocks array into ccu_clks_setup() rather than having each CCU's
setup callback function do it.
(The real motivation behind all of this is that we'll be doing some
static initialization of some additional CCU-specific data soon.)
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
As I developed the bcm281xx clock code I understood there were
restrictions on device tree "compatible" strings names, and as a
result "bcm11351" was used in places despite the part family being
more properly called "bcm281xx". This can be a little confusing.
In some cases I went to far and things using "bcm11351" when that
was not necessary.
This patch remedies this. It renames the symbol used to define the
"compatible" string (but not its value) so it uses "BCM281XX".
Similarly, the name names provided to the CLK_OF_DECLARE() macro
are changed, hoping to minimize the number of places that the
confusing "11351" string is used.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Use the init_data.name field to hold the name of a Kona clock rather
than duplicating it.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Currently, the for-loop used to try all the different dividers to find the
one that best fit tries all the values from 1 to max_div, incrementing by one.
In case of power-of-two, or table based divider, the loop isn't optimal.
Instead of incrementing by one, this patch provides directly the next divider.
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
In some cases, we want to be able to round the divider to the closest one,
instead than rounding up.
This patch adds a new CLK_DIVIDER_ROUND_CLOSEST flag to specify the divider
has to round to closest div, keeping rounding up as de default behaviour.
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Now that clk_unregister() frees the struct clk we're
unregistering we'll free memory twice: first we'll call kfree()
in __clk_release() with an address kmalloc doesn't know about and
second we'll call kfree() in the devres layer. Remove the
allocation of struct clk in devm_clk_register() and let
clk_release() handle it. This fixes slab errors like:
=============================================================================
BUG kmalloc-128 (Not tainted): Invalid object pointer 0xed08e8d0
-----------------------------------------------------------------------------
Disabling lock debugging due to kernel taint
INFO: Slab 0xeec503f8 objects=25 used=15 fp=0xed08ea00 flags=0x4081
CPU: 2 PID: 73 Comm: rmmod Tainted: G B 3.14.0-11032-g526e9c764381 #34
[<c0014be0>] (unwind_backtrace) from [<c0012240>] (show_stack+0x10/0x14)
[<c0012240>] (show_stack) from [<c04b74dc>] (dump_stack+0x70/0xbc)
[<c04b74dc>] (dump_stack) from [<c00f6778>] (slab_err+0x74/0x84)
[<c00f6778>] (slab_err) from [<c04b6278>] (free_debug_processing+0x2cc/0x31c)
[<c04b6278>] (free_debug_processing) from [<c04b6300>] (__slab_free+0x38/0x41c)
[<c04b6300>] (__slab_free) from [<c03931bc>] (clk_unregister+0xd4/0x140)
[<c03931bc>] (clk_unregister) from [<c02fb774>] (release_nodes+0x164/0x1d8)
[<c02fb774>] (release_nodes) from [<c02f8698>] (__device_release_driver+0x60/0xb0)
[<c02f8698>] (__device_release_driver) from [<c02f9080>] (driver_detach+0xb4/0xb8)
[<c02f9080>] (driver_detach) from [<c02f8480>] (bus_remove_driver+0x5c/0xc4)
[<c02f8480>] (bus_remove_driver) from [<c008c9b8>] (SyS_delete_module+0x148/0x1d8)
[<c008c9b8>] (SyS_delete_module) from [<c000ef80>] (ret_fast_syscall+0x0/0x48)
FIX kmalloc-128: Object at 0xed08e8d0 not freed
Fixes: fcb0ee6a3d (clk: Implement clk_unregister)
Cc: Jiada Wang <jiada_wang@mentor.com>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Cc: stable@vger.kernel.org
clk: socfpga: clock fix for v3.15
Currently on 3.15-rc1, the SOCFPGA platform is unable to boot. This patch
fixes the issue and allows the platform to boot.
commit [1771b10d6 clk: respect the clock dependencies in of_clk_init]
exposed a flaw in the socfpga clock driver and prevents the platform
from booting on 3.15-rc1.
Because the "altr,clk-mgr" is not really a clock, it should not be using
CLK_OF_DECLARE, instead we should be mapping the clk-mgr's base address
one of the functional clock init function. Use the socfpga_pll_init function
to map the clk_mgr_base_addr as this clock should always be initialized first.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Tested-by: Pavel Machek <pavel@denx.de>
The divider returned by clk_divider_bestdiv() is likely to be invalid in case
of power-of-two and table dividers when CLK_SET_RATE_PARENT flag isn't set.
Fixes boot on STiH416 platform.
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: trivial merge conflict & updated changelog]
The Broadcom Kona clock code, as originally written, made use of
unnamed union and struct fields. This is a feature present in C11,
and is a GNU extension otherwise. It worked very well for me.
Unfortunately, Russell King reported that this feature was not
supported in a build environment he used, which meant attempting
to build this code failed spectacularly.
Add names to these unnamed fields, and update the code accordingly.
Reported-by: Russell King <linux@arm.linux.org.uk>
Tested-by: Markus Mayer <markus.mayer@linaro.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit adds a core clock driver for the Orion5x SoC, with support
for the tclk, the CPU frequency and the DDR frequency. All the details
about the Sample-At-Reset register were extracted from the U-Boot
sources for Orion5x.
Note that Orion5x does not have gatable clocks, so this core clock
driver is sufficient to support clocking on Orion5x platforms.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: https://lkml.kernel.org/r/1398202002-28530-5-git-send-email-thomas.petazzoni@free-electrons.com
Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This series contains straight-forward fixes for different
Versatile Express infrastructure drivers:
- NULL pointer dereference on the error path in the clk driver
- out of boundary array access in the dcscb driver
- broken restart/power off implementation
- mis-interpreted voltage unit in the spc driver
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)
iQEcBAABAgAGBQJTWTroAAoJEL9jRaJfXa5PHMkIAJB2S6zuqIxn7qRsfeD5YauR
nz7AHjDaakoVy6YTaMdHQI+dXSK6BPUNvMbrKzW3WWbT4ktJ/r3k/OeeBv/2T93L
8KW1Bbif7kPfdfITwCCWDs5waTDVXSBC6AGGoXomzQIt4MqghhzoLRc6uvhnuYAL
R7ZJsTWRa+47LVOJsghVffMyNlwCMj//prW7PBY6RIZXhpcbI+FGYv5Rm1XRITWn
uL2cSulBmWeqMVCR/gFx8/K5TqZ90q835dD1Ggh+BeB1Vaifu9/cI3D8w0hl/xy9
nRneKdTaTEpKjgwI3up4vMFbLbMI7brdMphZ9ZeGgK+YuWXFDbKvvdwjvDJ4Tx0=
=BS4Q
-----END PGP SIGNATURE-----
Merge tag 'vexpress/fixes-for-3.15' of git://git.linaro.org/people/pawel.moll/linux into fixes
ARM Versatile Express fixes for 3.15
This series contains straight-forward fixes for different
Versatile Express infrastructure drivers:
- NULL pointer dereference on the error path in the clk driver
- out of boundary array access in the dcscb driver
- broken restart/power off implementation
- mis-interpreted voltage unit in the spc driver
* tag 'vexpress/fixes-for-3.15' of git://git.linaro.org/people/pawel.moll/linux:
ARM: vexpress/TC2: Convert OPP voltage to uV before storing
power/reset: vexpress: Fix restart/power off operation
arm/mach-vexpress: array accessed out of bounds
clk: vexpress: NULL dereference on error path
Includes an update to 3.15-rc2
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The Tegra124 clock driver currently provides 3 clocks that don't actually
exist; 2 for NAND and one for UART5/UARTE. Delete these.
Cc: <stable@vger.kernel.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
If the allocation fails then we dereference the NULL in the error path.
Just return directly.
Fixes: ed27ff1db8 ('clk: Versatile Express clock generators ("osc") driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Make sure debug clocks stay enabled if the bootloader enabled them.
Otherwise debug HW may crash due to bus-hangs caused by stopped clocks.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
When enabling the PLLE as its final step, clk_plle_enable() would
accidentally OR in the value previously written to the PLLE_SS_CTRL
register.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add div{m,n,p}_shift() and div{m,n,p}_mask_shifted() helpers to make the
code that modifies the m-, n- and p-divider fields of PLLs shorter and
easier to read.
Signed-off-by: Thierry Reding <treding@nvidia.com>
PLLE has M, N and P divider shift and width parameters that differ from
the defaults. Furthermore, when clearing the M, N and P divider fields
the corresponding masks were never shifted, thereby clearing only the
lowest bits of the register. This lead to a situation where the PLLE
programming would only work if the register hadn't been touched before.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
This driver can handle the clock controller in the s3c2412 soc.
The clock structure is built according to the manuals of the included
SoCs and might include changes in comparison to the previous clock
structure.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
The manuals do not give them explicit names like in later socs, so more
generic names with a s3c2410-prefix were used for them.
As it was common to do so in the previous implementation, functionality
to change the pll rate is already included.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Mike Turquette <mturquette@linaro.org>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
The three SoCs share a common clock tree which only differs in the
existence of some special clocks.
As with all parts common to these three SoCs the driver is named
after the s3c2443, as it was the first SoC introducing this structure
and there exists no other label to describe this s3c24xx epoch.
The clock structure is built according to the manuals of the included
SoCs and might include changes in comparison to the previous clock
structure. As an example the sclk_uart gate was never handled previously
and the div_uart was made to be the clock used by the serial driver.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
The s3c2443 uses different plls that are not present yet. Therefore
add the two needed types.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
According to the manual s3c2416 and s3c2450 use a pll 6552 and 6553
and while the pll_6553 matches exactly the one already implemented
the pll_6552 differs to the one from the s3c64xx series.
The change is solely in the bit locations of the mdiv and pdiv values.
All calculations are the same for both implementatons and even the
proposed divider-values for specific frequencies in the manuals are
the same.
Therefore implement a variant that simply uses the changed bit
locations if necessary.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Mostly clock driver updates, more Device Tree support in the form of
common functions useful across platforms and a handful of features and
fixes to the framework core.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=zk74
-----END PGP SIGNATURE-----
Merge tag 'clk-for-linus-3.15' of git://git.linaro.org/people/mike.turquette/linux
Pull clock framework changes from Mike Turquette:
"The clock framework changes for 3.15 look similar to past pull
requests. Mostly clock driver updates, more Device Tree support in
the form of common functions useful across platforms and a handful of
features and fixes to the framework core"
* tag 'clk-for-linus-3.15' of git://git.linaro.org/people/mike.turquette/linux: (86 commits)
clk: shmobile: fix setting paretn clock rate
clk: shmobile: rcar-gen2: fix lb/sd0/sd1/sdh clock parent to pll1
clk: Fix minor errors in of_clk_init() function comments
clk: reverse default clk provider initialization order in of_clk_init()
clk: sirf: update copyright years to 2014
clk: mmp: try to use closer one when do round rate
clk: mmp: fix the wrong calculation formula
clk: mmp: fix wrong mask when calculate denominator
clk: st: Adds quadfs clock binding
clk: st: Adds clockgen-vcc and clockgen-mux clock binding
clk: st: Adds clockgen clock binding
clk: st: Adds divmux and prediv clock binding
clk: st: Support for A9 MUX clocks
clk: st: Support for ClockGenA9/DDR/GPU
clk: st: Support for QUADFS inside ClockGenB/C/D/E/F
clk: st: Support for VCC-mux and MUX clocks
clk: st: Support for PLLs inside ClockGenA(s)
clk: st: Support for DIVMUX and PreDiv Clocks
clk: support hardware-specific debugfs entries
clk: s2mps11: Use of_get_child_by_name
...
These could not be part of the first cleanup branch, because they either
came too late in the cycle, or they have dependencies on other branches.
Important changes are:
* The integrator platform is almost multiplatform capable after
some reorganization (Linus Walleij)
* Minor cleanups on Zynq (Michal Simek)
* Lots of changes for Exynos and other Samsung platforms, including
further preparations for multiplatform support and the clocks bindings
are rearranged.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=1i9x
-----END PGP SIGNATURE-----
Merge tag 'tags/cleanup2-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late cleanups from Arnd Bergmann:
"These could not be part of the first cleanup branch, because they
either came too late in the cycle, or they have dependencies on other
branches. Important changes are:
- The integrator platform is almost multiplatform capable after some
reorganization (Linus Walleij)
- Minor cleanups on Zynq (Michal Simek)
- Lots of changes for Exynos and other Samsung platforms, including
further preparations for multiplatform support and the clocks
bindings are rearranged"
* tag 'tags/cleanup2-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (54 commits)
devicetree: fix newly added exynos sata bindings
ARM: EXYNOS: Fix compilation error in cpuidle.c
ARM: S5P64X0: Explicitly include linux/serial_s3c.h in mach/pm-core.h
ARM: EXYNOS: Remove hardware.h file
ARM: SAMSUNG: Remove hardware.h inclusion
ARM: S3C24XX: Remove invalid code from hardware.h
dt-bindings: clock: Move exynos-audss-clk.h to dt-bindings/clock
ARM: dts: Keep some essential LDOs enabled for arndale-octa board
ARM: dts: Disable MDMA1 node for arndale-octa board
ARM: S3C64XX: Fix build for implicit serial_s3c.h inclusion
serial: s3c: Fix build of header without serial_core.h preinclusion
ARM: EXYNOS: Allow wake-up using GIC interrupts
ARM: EXYNOS: Stop using legacy Samsung PM code
ARM: EXYNOS: Remove PM initcalls and useless indirection
ARM: EXYNOS: Fix abuse of CONFIG_PM
ARM: SAMSUNG: Move s3c_pm_check_* prototypes to plat/pm-common.h
ARM: SAMSUNG: Move common save/restore helpers to separate file
ARM: SAMSUNG: Move Samsung PM debug code into separate file
ARM: SAMSUNG: Consolidate PM debug functions
ARM: SAMSUNG: Use debug_ll_addr() to get UART base address
...
These changes are mostly for ARM specific device drivers that either
don't have an upstream maintainer, or that had the maintainer ask
us to pick up the changes to avoid conflicts. A large chunk of this
are clock drivers (bcm281xx, exynos, versatile, shmobile), aside from
that, reset controllers for STi as well as a large rework of the
Marvell Orion/EBU watchdog driver are notable.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=u/FI
-----END PGP SIGNATURE-----
Merge tag 'drivers-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver changes from Arnd Bergmann:
"These changes are mostly for ARM specific device drivers that either
don't have an upstream maintainer, or that had the maintainer ask us
to pick up the changes to avoid conflicts.
A large chunk of this are clock drivers (bcm281xx, exynos, versatile,
shmobile), aside from that, reset controllers for STi as well as a
large rework of the Marvell Orion/EBU watchdog driver are notable"
* tag 'drivers-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (99 commits)
Revert "dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac."
Revert "net: stmmac: Add SOCFPGA glue driver"
ARM: shmobile: r8a7791: Fix SCIFA3-5 clocks
ARM: STi: Add reset controller support to mach-sti Kconfig
drivers: reset: stih416: add softreset controller
drivers: reset: stih415: add softreset controller
drivers: reset: Reset controller driver for STiH416
drivers: reset: Reset controller driver for STiH415
drivers: reset: STi SoC system configuration reset controller support
dts: socfpga: Add sysmgr node so the gmac can use to reference
dts: socfpga: Add support for SD/MMC on the SOCFPGA platform
reset: Add optional resets and stubs
ARM: shmobile: r7s72100: fix bus clock calculation
Power: Reset: Generalize qnap-poweroff to work on Synology devices.
dts: socfpga: Update clock entry to support multiple parents
ARM: socfpga: Update socfpga_defconfig
dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac.
net: stmmac: Add SOCFPGA glue driver
watchdog: orion_wdt: Use %pa to print 'phys_addr_t'
drivers: cci: Export CCI PMU revision
...
Lots of isolated bug fixes that were not found to be important
enough to be submitted before the merge window or backported
into stable kernels.
The vast majority of these came out of Arnd's randconfig testing
and just prevents running into build-time bugs in configurations
that we do not care about in practice.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=KRJL
-----END PGP SIGNATURE-----
Merge tag 'fixes-non-critical-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC non-critical bug fixes from Arnd Bergmann:
"Lots of isolated bug fixes that were not found to be important enough
to be submitted before the merge window or backported into stable
kernels.
The vast majority of these came out of Arnd's randconfig testing and
just prevents running into build-time bugs in configurations that we
do not care about in practice"
* tag 'fixes-non-critical-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (75 commits)
ARM: at91: fix a typo
ARM: moxart: fix CPU selection
ARM: tegra: fix board DT pinmux setup
ARM: nspire: Fix compiler warning
IXP4xx: Fix DMA masks.
Revert "ARM: ixp4xx: Make dma_set_coherent_mask common, correct implementation"
IXP4xx: Fix Goramo Multilink GPIO conversion.
Revert "ARM: ixp4xx: fix gpio rework"
ARM: tegra: make debug_ll code build for ARMv6
ARM: sunxi: fix build for THUMB2_KERNEL
ARM: exynos: add missing include of linux/module.h
ARM: exynos: fix l2x0 saved regs handling
ARM: samsung: select CRC32 for SAMSUNG_PM_CHECK
ARM: samsung: select ATAGS where necessary
ARM: samsung: fix SAMSUNG_PM_DEBUG Kconfig logic
ARM: samsung: allow serial driver to be disabled
ARM: s5pv210: enable IDE support in MACH_TORBRECK
ARM: s5p64x0: fix building with only one soc type
ARM: s3c64xx: select power domains only when used
ARM: s3c64xx: MACH_SMDK6400 needs HSMMC1
...
If the driver needs to change a clock rate, then it must be propogated
through the MSTP clock to the parent clock (such as shdi0 -> sd0). Without
this we cannot up-rate default clocks which are really slow (such as the
mmcif1 which defaults to 12MHz where it could be running at 97MHz)
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The clock generator for rcar-gen2 has the lb, sdh, sd0 and sd1 clocks
parented to pll1_div2 where the hardware diagram shows these to be
directly fed from pll1.
This fixes the initial rate for sdh0 clock to be 97.5MHz instead of
the reported 48MHz where the manual says the default register values
are for 97.5MHz.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
From Tomasz Figa:
This series reworks suspend/resume handling of Samsung clock drivers
to cover more SoC specific aspects that are beyond simple register
save and restore. The goal is to have all the suspend/resume code
that touches the clock controller in single place, which is the clock
driver.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=82IK
-----END PGP SIGNATURE-----
Merge tag 'samsung-pm-1' of http://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers
Merge "Samsung S2R PM updates for v3.15" from Kukjin Kim:
From Tomasz Figa:
This series reworks suspend/resume handling of Samsung clock drivers
to cover more SoC specific aspects that are beyond simple register
save and restore. The goal is to have all the suspend/resume code
that touches the clock controller in single place, which is the clock
driver.
* tag 'samsung-pm-1' of http://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: EXYNOS: Drop legacy Exynos4 clock suspend/resume code
clk: samsung: exynos4: Add remaining suspend/resume handling
clk: samsung: Drop old suspend/resume code
clk: samsung: s3c64xx: Move suspend/resume handling to SoC driver
clk: samsung: exynos5420: Move suspend/resume handling to SoC driver
clk: samsung: exynos5250: Move suspend/resume handling to SoC driver
clk: samsung: exynos4: Move suspend/resume handling to SoC driver
clk: samsung: Provide common helpers for register save/restore
clk: exynos4: Remove remnants of non-DT support
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This restores the default clocks registration order as parsed from
devicetree, i.e. as before commit 1771b10d60
"clk: respect the clock dependencies in of_clk_init", for when there
is no explicit parent clock dependencies between clock providers
specified in the device tree.
It prevents regressions (boot failure, division by 0 errors) on
imx and exynos platforms.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The orignal code will use the bigger rate between
"previous rate" and "current rate" when caculate the
rate.
In fact, hardware cares about the closest one.
So choose the closer rate between "previous rate" and
"current rate".
Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The formula is numerator/denominator = Fin / (Fout * factor)
So
Fout = Fin * denominator / (numerator * factor).
Current clk_factor_round_rate and clk_factor_recalc_rate use
wrong formula. This patch will fix them.
Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The code has typo when calculate denominator. It should use
den_mask instead of num_mask.
Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Merge "arm: Xilinx Zynq cleanup patches for v3.15" from Michal Simek:
- Redesign SLCR initialization to enable
driver developing which targets SLCR space
* tag 'zynq-cleanup-for-3.15-v2' of git://git.xilinx.com/linux-xlnx:
ARM: zynq: Add waituart implementation
ARM: zynq: Move of_clk_init from clock driver
ARM: zynq: Introduce zynq_slcr_unlock()
ARM: zynq: Add and use zynq_slcr_read/write() helper functions
ARM: zynq: Make zynq_slcr_base static
ARM: zynq: Map I/O memory on clkc init
ARM: zynq: Hang iomapped slcr address on device_node
ARM: zynq: Split slcr in two parts
ARM: zynq: Move clock_init from slcr to common
arm: dt: zynq: Add fclk-enable property to clkc node
[Arnd: remove SOC_BUS support from pull request]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The patch supports the A9-mux clocks used by ClockGenA9
A9-mux clock : Multiplexer inside ClockGenA9. A9 clock can be driven by
either PLL or External clock (with an optional divide-by-2). This is
implemented as 3-parent clock : PLL, Ext-clk OR Ext-clk/2
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The patch added support for DT registration of ClockGenA9/DDR/GPU
ClockgenA9/DDR : It includes c32 type PLL (also in ClockgenA1x), hence
only CLK_OF_DECLARE implementation is required.
ClockgenGPU : It includes c65 type PLL (also in ClockgenAx), hence
only CLK_OF_DECLARE implementation is required.
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The patch supports the 216/432/660 type Quad Frequency Synthesizers
used by ClockGenB/C/D/E/F
QUADFS clock : It includes support for all 216/432/660 type Quad
Frequency Synthesizers : implemented as Fixed Parent / Rate / Gate clock,
with clock rate calculated reading H/w settings done at BOOT.
QuadFS have 4 outputs : chan0 chan1 chan2 chan3
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The patch supports the VCC-mux and MUX clocks used by ClockGenC/F
VCC-mux clock : Divider-Multiplexer-Gate inside ClockGenC/F
It includes support for each channel : 4-parent Multiplexer, Post Divide
by 1, 2, 4 or 8, Gate to switch OFF the output channel. The clock is
implemented using generic clocks implemented in the kernel clk_divider, clk_mux,
clk_gate and clk_composite (to combine all)
MUX clock : 2-parent clock used inside ClockGenC/F. The clock is implemented
using generic clocks implemented in the kernel clk_mux.
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The patch supports the c65/c32 type PLLs used by ClockGenA(s)
PLL clock : It includes support for all c65/c32 type PLLs
inside ClockGenA(s) : implemented as Fixed Parent / Fixed Rate clock,
with clock rate calculated reading H/w settings done at BOOT.
c65 PLLs have 2 outputs : HS and LS
c32 PLLs have 1-4 outputs : ODFx
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The patch supports the DIVMUX and PreDiv clocks used by ClockGenA(s)
DIVMUX clock : Divider-Multiplexer-Gate inside ClockGenA(s)
It includes support for each channel : 3-parent Multiplexer,
Divider for each Parent, Gate to switch OFF the output channel. The
clock is implemented using generic clocks implemented in the kernel
clk_divider and clk_mux.
PreDiv clock : Fixed Divider Clock used inside ClockGenA(s) to divide
the oscillator clock by factor-of-16. The clock is implemented using
generic clocks implemented in the kernel clk_divider.
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add a new clk_ops->debug_init method to allow a clock hardware
driver to populate the clock's debugfs directory with entries
beyond those common for every clock.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
of_find_node_by_name() walks over all nodes and can thus walk outside of
the parent node. Use of_get_child_by_name() instead.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
If parent device does not have of_node set the s2mps11_clk_parse_dt()
returned NULL. This NULL was later passed to of_clk_add_provider() which
dereferenced it in pr_debug() call.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
If a rate change failed it's the opportunity of the caller to handle
this. Do not spam the log with a message.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Most of the clock related dt-binding header files are located in
dt-bindings/clock folder. It would be good to keep all the similar
header files at a single location.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Until now the clock providers were initialized in the order found in
the device tree. This led to have the dependencies between the clocks
not respected: children clocks could be initialized before their
parent clocks.
Instead of forcing each platform to manage its own initialization order,
this patch adds this work inside the framework itself.
Using the data of the device tree the of_clk_init function now delayed
the initialization of a clock provider if its parent provider was not
ready yet.
The strict dependency check (all parents of a given clk must be
initialized) was added by Boris BREZILLON
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The clock bindings for Freescale CoreNet platform are updated.
So, the driver needs to be updated accordingly.
The main changes include:
- Added a new node to present the input system clock
- Changed PLL and MUX's compatible string
Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The PCKRDY bit is not set until the system clock is enabled.
This patch moves the management of the ready status in the system clock
driver.
Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
System clks are just gates, and thus do not provide any rate operations.
Authorize clk rate change to be propagated to system clk parents.
Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Implement the determine_rate callback to choose the best parent clk that
fulfills the requested rate.
Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This should read MOD0 and not MMC; MMC is just one example of a MOD0
clock.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Some divisor calculations were misrounded, causing higher than requested
rates on some clocks. Fix them up using DIV_ROUND_UP, and replace one
homebrew instance of it as well with the right macro.
Reported-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Allwinner actually reworked the PLL4 on A20; now it's compatible with
the sun4i PLL5/6 design previous to any divisions, as well as to the new
PLL8 in sun7i.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Allwinner sunXi SoCs clock changes
This adds support for the new, more correct clock node naming and gets
the A10 compatibles in line with the rest of the other SoCs. It also
adds support for the USB, GMAC and A31's PLL6 clocks. Some of these
changes also require DT modifications that will be merged via arm-soc.
Remove the static variable. So these common clock register helper could
be used in more SoCs.
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
WARNING: drivers/clk/socfpga/built-in.o(.data+0xc0): Section mismatch in
reference from the variable socfpga_child_clocks to the function
.init.text:socfpga_pll_init()
The variable socfpga_child_clocks references
the function __init socfpga_pll_init()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
WARNING: drivers/clk/socfpga/built-in.o(.data+0x184): Section mismatch in
reference from the variable socfpga_child_clocks to the function
.init.text:socfpga_periph_init()
The variable socfpga_child_clocks references
the function __init socfpga_periph_init()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
WARNING: drivers/clk/socfpga/built-in.o(.data+0x248): Section mismatch in
reference from the variable socfpga_child_clocks to the function
.init.text:socfpga_gate_init()
The variable socfpga_child_clocks references
the function __init socfpga_gate_init()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
Reported-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Since clock operation within S2MPS11 and S5M8767 are similar, we can
support both the devices within a single driver.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The clocks in S2MPS11 and S5M8767 are managed in the same way, baring
a difference in the register offset. It would be better to update
existing S2MPS11 driver to support the clocks in S5M8767, rather than
creating an almost duplicate driver altogether.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
MOXA ART SoCs allow to determine PLL output and APB frequencies
by reading registers holding multiplier and divisor information.
Add a clock driver for this SoC.
Signed-off-by: Jonas Jensen <jonas.jensen@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Move of_clk_init() from clock driver to enable
options not to use zynq clock driver.
Use for example fixed clock setting.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit adds support for the Core Divider clocks of the Armada
380 SoCs. Similarly to Armada 370 and XP, the Core Divider clocks of
the 380 have gate capabilities. The only difference is the register layout.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Link: https://lkml.kernel.org/r/1394742273-5113-2-git-send-email-ezequiel.garcia@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Not all revisions have all the clocks so get the necessary clocks
based on hardware revision.
This should avoid un-necessary clk_get failure messages that were
observed earlier.
Also remove the dummy USB host clocks from the OMAP3 clock data.
These are no longer expected by the driver.
Acked-by: Mike Turquette <mturquette@linaro.org> [OMAP3 CLK data]
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
When arch/arm/mach-omap2/gpmc.c calls clk_get(..., "fck"), it will
get a dummy clock and try to use it. As the rate is configured to zero,
this will result in several divisions by zero, and misconfigured
timings, with devices on the bus being lost in the La La Land.
It is better to remove gpmc_fck from the dummy clocks, so that gpmc.c
can fail gracefully.
Cc: stable@vger.kernel.org # v3.14+
Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
CPU frequency cannot be scaled.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=UEPE
-----END PGP SIGNATURE-----
Merge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux
Pull clk driver fix from Mike Turquette:
"Single fix for a clock driver merged in 3.14-rc1. Without this fix
the CPU frequency cannot be scaled"
* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux:
clk: shmobile: rcar-gen2: Use kick bit to allow Z clock frequency change
The Z clock frequency change is effective only after setting the kick
bit located in the FRQCRB register.
Without that, the CA15 CPUs clock rate will never change.
Fix that by checking if the kick bit is cleared and enable it to make
the clock rate change effective. The bit is cleared automatically upon
completion.
Signed-off-by: Benoit Cousson <bcousson+renesas@baylibre.com>
Acked-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This pull request contains the Broadcom bcm281xx
clock driver series. This series is being merged
through the arm-soc tree because there is an
ordering dependency where the driver *must* be
merged before the related dts changes. This is
a result of the bcm281xx dts already containing
dummy fixed clock nodes that must be updated.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=Kma/
-----END PGP SIGNATURE-----
Merge tag 'armsoc/for-3.15/drivers' of git://github.com/broadcom/mach-bcm into next/drivers
Merge "ARM: mach-bcm: bcm281xx clock driver" from Matt Porter:
This pull request contains the Broadcom bcm281xx
clock driver series. This series is being merged
through the arm-soc tree because there is an
ordering dependency where the driver *must* be
merged before the related dts changes. This is
a result of the bcm281xx dts already containing
dummy fixed clock nodes that must be updated.
* tag 'armsoc/for-3.15/drivers' of git://github.com/broadcom/mach-bcm:
clk: bcm281xx: don't disable unused peripheral clocks
clk: bcm281xx: add initial clock framework support
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
ti/clk-divider.c does not calculate the rates consistently at the moment.
As an example, on OMAP3 we have a clock divider with a source clock of
864000000 Hz. With dividers 6, 7 and 8 the theoretical rates are:
6: 144000000
7: 123428571.428571...
8: 108000000
Calling clk_round_rate() with the rate in the first column will give the
rate in the second column:
144000000 -> 144000000
143999999 -> 123428571
123428572 -> 123428571
123428571 -> 108000000
Note how clk_round_rate() returns 123428571 for rates from 123428572 to
143999999, which is mathematically correct, but when clk_round_rate() is
called with 123428571, the returned value is surprisingly 108000000.
This means that the following code works a bit oddly:
rate = clk_round_rate(clk, 123428572);
clk_set_rate(clk, rate);
As clk_set_rate() also does clock rate rounding, the result is that the
clock is set to the rate of 108000000, not 123428571 returned by the
clk_round_rate.
This patch changes the ti/clk-divider.c to use DIV_ROUND_UP when
calculating the rate. This gives the following behavior which fixes the
inconsistency:
144000000 -> 144000000
143999999 -> 123428572
123428572 -> 123428572
123428571 -> 108000000
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
clk-divider.c does not calculate the rates consistently at the moment.
As an example, on OMAP3 we have a clock divider with a source clock of
864000000 Hz. With dividers 6, 7 and 8 the theoretical rates are:
6: 144000000
7: 123428571.428571...
8: 108000000
Calling clk_round_rate() with the rate in the first column will give the
rate in the second column:
144000000 -> 144000000
143999999 -> 123428571
123428572 -> 123428571
123428571 -> 108000000
Note how clk_round_rate() returns 123428571 for rates from 123428572 to
143999999, which is mathematically correct, but when clk_round_rate() is
called with 123428571, the returned value is surprisingly 108000000.
This means that the following code works a bit oddly:
rate = clk_round_rate(clk, 123428572);
clk_set_rate(clk, rate);
As clk_set_rate() also does clock rate rounding, the result is that the
clock is set to the rate of 108000000, not 123428571 returned by the
clk_round_rate.
This patch changes the clk-divider.c to use DIV_ROUND_UP when
calculating the rate. This gives the following behavior which fixes the
inconsistency:
144000000 -> 144000000
143999999 -> 123428572
123428572 -> 123428572
123428571 -> 108000000
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
cppcheck detected following error
[clk-master.c:245]: (error) Memory leak: characteristics
The original code forgot to free characteristics when
irq_of_parse_and_map() failed.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This patch adds support for the new v2 version of the axi-clkgen core.
Unfortunately the method of accessing the registers is quite different on v2,
while the content still stays largely the same. So the patch adds a small
abstraction layer which implements the specific read and write functions for v1
and v2 in callback functions.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Suggest by Arnd: abstract mmc tuning as clock behavior,
also because different soc have different tuning method and registers.
hi3620_mmc_clks is added to handle mmc clock specifically on hi3620.
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The PLLs can be from 3 different sources: osc1, osc2, or the f2s_ref_clk.
Update the clock driver to be able to get the correct parent.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Use 64-bit integer for calculating clock rate. Also use do_div for the
64-bit division.
Signed-off-by: Graham Moore <grmoore@altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The Nomadik debugfs screws up multiplatform boots if debugfs
is enabled on the multiplatform image, since it's a simple
initcall that is unconditionally executed and reads from certain
memory locations.
Fix this by checking that the driver has been properly
initialized, so a base offset to the Nomadik SRC controller
exists, before proceeding to register debugfs files.
Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
As we move toward multiplatform support for the Integrator family
we need to localize all <mach/*> headers. This moves the impd1.h
header down to the machine folder, copying the the three defines
only used by the clock driver down into the clock driver.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Jonathan Austin <jonathan.austin@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Do not use readl/writel directly because the whole
clk subsystem is using clk_readl/clk_writel functions.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
These variable clocks have nothing to do with MSTP gating, probably a
copy&paste leftover.
Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
cpu0 clock node has no functionality, since cpufreq-cpu0 is already
capable of picking up the clock from dts.
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Ensure clk->kref is dereferenced only when clk is not NULL.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
At probe time, a clock device may not be ready when some other device
wants to use it.
This patch lets the functions clk_get/devm_clk_get return a probe defer
when the clock is defined in the DT but not yet available.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Both the pr_err and the additional kerneldoc aim to help when debugging
errors thrown from within a clock rate-change notifier callback.
Reported-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Fixes stray access to undefined registers, use of wrong clock parents &
running clocks at wrong rates. All of these issues cause regressions in
the form of boards that are unable to boot or crash and die horrible
deaths.
Add the CLK_IGNORE_UNUSED flag when setting up a peripheral clock.
This prevents unused clocks from getting disabled, and by doing
this we can use the common clock code even before we've resolved
all the spots that need to get a reference to their clock.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Matt Porter <mporter@linaro.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
Add code for device tree support of clocks in the BCM281xx family of
SoCs. Machines in this family use peripheral clocks implemented by
"Kona" clock control units (CCUs). (Other Broadcom SoC families use
Kona style CCUs as well, but support for them is not yet upstream.)
A BCM281xx SoC has multiple CCUs, each of which manages a set of
clocks on the SoC. A Kona peripheral clock is composite clock that
may include a gate, a parent clock multiplexor, and zero, one
or two dividers. There is a variety of gate types, and many gates
implement hardware-managed gating (often called "auto-gating").
Most dividers divide their input clock signal by an integer value
(one or more). There are also "fractional" dividers which allow
division by non-integer values. To accomodate such dividers,
clock rates and dividers are generally maintained by the code in
"scaled" form, which allows integer and fractional dividers to
be handled in a uniform way.
If present, the gate for a Kona peripheral clock must be enabled
when a change is made to its multiplexor or one of its dividers.
Additionally, dividers and multiplexors have trigger registers which
must be used whenever the divider value or selected parent clock is
changed. The same trigger is often used for a divider and
multiplexor, and a BCM281xx peripheral clock occasionally has two
triggers.
The gate, dividers, and parent clock selector are treated in this
code as "components" of a peripheral clock. Their functionality is
implemented directly--e.g. the common clock framework gate
implementation is not used for a Kona peripheral clock gate. (This
has being considered though, and the intention is to evolve this
code to leverage common code as much as possible.)
The source code is divided into three general portions:
drivers/clk/bcm/clk-kona.h
drivers/clk/bcm/clk-kona.c
These implement the basic Kona clock functionality,
including the clk_ops methods and various routines to
manipulate registers and interpret their values. This
includes some functions used to set clocks to a desired
initial state (though this feature is only partially
implemented here).
drivers/clk/bcm/clk-kona-setup.c
This contains generic run-time initialization code for
data structures representing Kona CCUs and clocks. This
encapsulates the clock structure initialization that can't
be done statically. Note that there is a great deal of
validity-checking code here, making explicit certain
assumptions in the code. This is mostly useful for adding
new clock definitions and could possibly be disabled for
production use.
drivers/clk/bcm/clk-bcm281xx.c
This file defines the specific CCUs used by BCM281XX family
SoCs, as well as the specific clocks implemented by each.
It declares a device tree clock match entry for each CCU
defined.
include/dt-bindings/clock/bcm281xx.h
This file defines the selector (index) values used to
identify a particular clock provided by a CCU. It consists
entirely of C preprocessor constants, to be used by both the
C source and device tree source files.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Matt Porter <mporter@linaro.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
- mvebu (Armada 375/380/385)
- extend corediv clock driver to support new SoCs
- add core and gating clock drivers for new SoCs
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)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=Aah7
-----END PGP SIGNATURE-----
Merge tag 'clk-mvebu-3xx-3.15' of git://git.infradead.org/linux-mvebu into clk-next-mvebu
clock: mvebu new SoC changes for v3.15
- mvebu (Armada 375/380/385)
- extend corediv clock driver to support new SoCs
- add core and gating clock drivers for new SoCs
ux500_twocell_get is a local symbol.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
tegra_clk_periph_no_gate_ops is a local symbol.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add a property called clock-indices to allow clock-output-names
to be used where the index used to lookup a clock is not a 1:1
mapping to the array position in the clock-output-names
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Tegra124 does not have gr2d and gr3d clocks. They have been replaced by the
vic03 and gpu clocks respectively.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
The qspi clock divisor is incorrectly set to twice the value it should
have, possibly because it has been computed based on PLL1 as the clock
parent instead of PLL1 / 2 (the datasheets specifies the qspi nominal
frequencies, not the divisor values). Fix it.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The lb, qspi, sdh, sd0 and sd1 clocks have the PLL1 (divided by 2) as
their parent, not the main clock. Fix it.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The clk-phase property is used to represent the 2 clock phase values that is
needed for the SD/MMC driver. Add a prepare function to the clk_ops, that will
use the syscon driver to set sdmmc_clk's phase shift that is located in the
system manager.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
---
v9: none
v8: Use degrees in the clk-phase binding property
v7: Add dts property to represent the clk phase of the sdmmc_clk. Add a
prepare function to the gate clk that will toggle clock phase setting.
Remove the "altr,socfpga-sdmmc-sdr-clk" clock type.
v6: Add a new clock type "altr,socfpga-sdmmc-sdr-clk" that will be used to
set the phase shift settings.
v5: Use the "snps,dw-mshc" binding
v4: Use the sdmmc_clk prepare function to set the phase shift settings
v3: Not use the syscon driver because as of 3.13-rc1, the syscon driver is
loaded after the clock driver.
v2: Use the syscon driver
Move the different kinds of clocks into their own files. The reason is to aid
readability of the code. This also goes along with the other SoC-specific
clock drivers.
The split introduces new structs for the three types of clocks and uses them.
Other changes are not done to the code.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
The clk_name field from the socfpga_clk struct is unused.
Remove it.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
The only thing that socfpga_init_clocks was doing is setting up the smp_twd clk.
Now that twd-timer's clock phandle is populated in the DTS, we can remove
this function.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
After the patch:
"clk: socfpga: Map the clk manager base address in the clock driver"
The clk->name field in socfpga_clk_recalc_rate() was getting cleared. Replace
looking for the GPIO_DB_CLK by its divider offset instead.
Also rename the define SOCFPGA_DB_CLK_OFFSET -> SOCFPGA_GPIO_DB_CLK_OFFSET, as
this represents the GPIO_DB_CLK.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
The clk manager's base address was being mapped in SOCFPGA's arch code and
being extern'ed out to the clock driver. This method is not correct, and the
arch code was not really doing anything with that clk manager anyways.
This patch moves the mapping of the clk manager's base address in the clock
driver itself. Cleans up CLK_OF_DECLARE() into a single registration of all
the clocks.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
v2: Use a static declaration for the clk_mgr_base_addr. Clean up the
CLK_OF_DECLARE() as suggested by Arnd.
Contradicting to documenation, the notifier callbacks do receive
the original clock rate in struct clk_notifier_data.old_rate and the new
frequency struct clk_notifier_data.new_rate, independent of the
notification reason.
This behavior also seems to make more sense, since callbacks can use the
same code to deterimine whether clocks are scaled up or down. Something
which would not even possible in the post-rate-change case if the
behavior was as documented.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The Allwinner A10 compatibles were following a slightly different compatible
patterns than the rest of the SoCs for historical reasons. Add compatibles
matching the other pattern to the clock driver for consistency, and keep the
older one for backward compatibility.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
The Allwinner A20/A31 clock module controls the transmit clock source
and interface type of the GMAC ethernet controller. Model this as
a single clock for GMAC drivers to use.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
The A31 has a slightly different PLL6 clock. Add support for this new clock in
our driver.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Add register definitions for the usb-clk register found on sun4i, sun5i and
sun7i SoCs.
Signed-off-by: Roman Byshko <rbyshko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
The usb-clk register is special in that it not only contains clk gate bits,
but also has a few reset bits. This commit adds support for this by allowing
gates type sunxi clks to also register a reset controller.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
When requesting a rate less than the minimum clock rate for a divider,
use the maximum divider value instead of bailing out with an error.
This matches the behavior of the generic clock divider.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
When pll_x is the parent of cclk_lp, PLLX_DIV2_BYPASS_LP determines
whether cclk_lp output is divided by 2. Set TEGRA_DIVIDER_2 so that
the clk_super driver is aware of this.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
The sdmmc clocks on Tegra114 and Tegra124 are 3-bit wide muxes with
6 parents. Add support for tegra_clk_sdmmc*_8 and switch Tegra114
and Tegra124 to use these clocks instead.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
The host1x clock on Tegra124 is a 3-bit wide mux with 6 parents.
Change thte id to tegra_clk_host1x_8 so that the correct clock gets
registered.
Signed-off-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Set correct pll_d2_out0 divider and correct the p div values for pll_d2.
Signed-off-by: David Ung <davidu@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
PLLD was using the same mnp table as PLLP. Fix it to use its own
table which is different from PLLP's.
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
This table had settings for 216MHz, but PLLP is (and is supposed to be)
configured at 408MHz. If that table is used and PLLP_BASE_OVRRIDE is
not set, the kernel will panic in clk_pll_recalc_rate().
Signed-off-by: Gabe Black <gabeblack@google.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Add clocks required for accessing fuses on Tegra20.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Add the clock support for the new SoCs Armada 380 and Armada 385:
core clocks and gating clocks.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Add the clock support for the new SoC Armada 375: core clocks and
gating clocks.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit adds support for the Core Divider clocks of the Armada
375. Compared to Armada 370 and XP the Core Divider clocks of the 375
cannot be gated: only their ratio can be changed. This is reflected by
the fact that the enable, disable and is_enabled clock operations are
not defined, and that the enable_bit_offset field is also undefined.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit refactors the corediv clock driver so that it is capable
of handling various SOCs that have slightly different corediv clock
registers and capabilities.
It introduces a clk_corediv_soc_desc structure that encapsulates all
the SoC specific details.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
As of now, part of Exynos4 clock suspend/resume handling is located
in mach-exynos/pm.c, which is not where code accessing CMU registers
should reside.
This patch implements all the necessary suspend/resume handling code
in Exynos4 clock driver to allow dropping that old code.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Since all SoC drivers have been moved to local suspend/resume handling,
the old code can be safely dropped.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
As suspend/resume handlers are being moved to SoC specific code, due to
differencies in suspend/resume handling of particular SoCs, to minimize
code duplication this patch provides common register save/restore
helpers that save/restore given list of registers of clock controller.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This patch simplifies a bit clock initialization code by removing
remnants of non-DT clock initialization, such as reg_base and xom values
passed in function parameters.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
If the ICST clock has a parent, respect the rate of the parent
when calculating the clock frequency. As this involves modifying
the ICST parameter struct, make a cloned copy (the divisor
arrays should be safe) so we can update the .ref field.
Do not define the reference clock on the Integrator as we have
the reference clock from the device tree. Keep it everywhere
else.
Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
As we want to actually define the parent frequency in the device
tree for the ICST clocks, modify the clock registration function
to take a parent argument.
Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This atomic commit changes the Integrator clock implementation
and the machines to register clocks from the device tree and
use these instead of the previous hard-coded clocks.
In the clock implementation all hard-coded clocks and the
special initialization function call goes away, and is
replaced by two compatible strings for the two clocks
available on the core module.
Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The clk_init_data struct is allocated in the stack. All members of
this struct should be initialized before using otherwise it will
lead to unpredictable situation as it can contain garbage.
Ultimately the clk->flag field contains garbage. In my case it leads
that flag CLK_IGNORE_UNUSED is set for most of clocks. As result a
bunch of unused clocks cannot be disabled.
So initialize flags in this structure too.
Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
The clkc has its registers in the range of the slcr.
Instead of passing around the slcr base address pointer, let the clkc get the
address from the DT.
This prepares the slcr to be a real driver with multiple memory ranges
(slcr, clocks, pinctrl,...)
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Init order of CLK_OF_DECLARE'd drivers depends on compile order.
Unfortunately, clk_of_init does not allow drivers to return errors,
e.g. -EPROBE_DEFER if parent clocks have not been registered, yet.
To avoid init order woes for MVEBU clock drivers, we take care of
proper init order ourselves. This patch joins core-clk and gating-clk
init to maintain proper init order.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Init order of CLK_OF_DECLARE'd drivers depends on compile order.
Unfortunately, clk_of_init does not allow drivers to return errors,
e.g. -EPROBE_DEFER if parent clocks have not been registered, yet.
To avoid init order woes for MVEBU clock drivers, we take care of
proper init order ourselves. This patch joins core-clk and gating-clk
init to maintain proper init order.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Init order of CLK_OF_DECLARE'd drivers depends on compile order.
Unfortunately, clk_of_init does not allow drivers to return errors,
e.g. -EPROBE_DEFER if parent clocks have not been registered, yet.
To avoid init order woes for MVEBU clock drivers, we take care of
proper init order ourselves. This patch joins core-clk and gating-clk
init to maintain proper init order.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Init order of CLK_OF_DECLARE'd drivers depends on compile order.
Unfortunately, clk_of_init does not allow drivers to return errors,
e.g. -EPROBE_DEFER if parent clocks have not been registered, yet.
To avoid init order woes for MVEBU clock drivers, we take care of
proper init order ourselves. This patch joins core-clk and gating-clk
init to maintain proper init order.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Divs clocks consist of a parent factor clock with multiple outputs,
and seperate clocks for each output. Get the name of the parent
clock from the parent factor clock, instead of the DT node name.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Some factor clocks, such as the parent clock of pll5 and pll6, have
multiple output names. Add the corresponding names to factors_data
tied to compatible string.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
sunxi clock drivers use dt node name as clock name, but clock
nodes should be named clk@X, so the names would be the same.
Let the drivers read clock names from dt clock-output-names
property.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
dominated by platform support for Qualcomm's MSM SoCs, DT binding
updates for TI's OMAP-ish processors and additional support for Samsung
chips. Additionally there are other smaller clock driver changes and
several last minute fixes. This pull request also includes the HiSilicon
support that depends on the already-merged arm-soc pull request.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=WRJD
-----END PGP SIGNATURE-----
Merge tag 'clk-for-linus-3.14-part2' of git://git.linaro.org/people/mike.turquette/linux
Pull more clock framework changes from Mike Turquette:
"The second half of the clock framework pull requeust for 3.14 is
dominated by platform support for Qualcomm's MSM SoCs, DT binding
updates for TI's OMAP-ish processors and additional support for
Samsung chips.
Additionally there are other smaller clock driver changes and several
last minute fixes. This pull request also includes the HiSilicon
support that depends on the already-merged arm-soc pull request"
[ Fix up stupid compile error in the source tree with evil merge - Grumpy Linus ]
* tag 'clk-for-linus-3.14-part2' of git://git.linaro.org/people/mike.turquette/linux: (49 commits)
clk: sort Makefile
clk: sunxi: fix overflow when setting up divided factors
clk: Export more clk-provider functions
dt-bindings: qcom: Fix warning with duplicate dt define
clk: si5351: remove variant from platform_data
clk: samsung: Remove unneeded semicolon
clk: qcom: Fix modular build
ARM: OMAP3: use DT clock init if DT data is available
ARM: AM33xx: remove old clock data and link in new clock init code
ARM: AM43xx: Enable clock init
ARM: OMAP: DRA7: Enable clock init
ARM: OMAP4: remove old clock data and link in new clock init code
ARM: OMAP2+: io: use new clock init API
ARM: OMAP2+: PRM: add support for initializing PRCM clock modules from DT
ARM: OMAP3: hwmod: initialize clkdm from clkdm_name
ARM: OMAP: hwmod: fix an incorrect clk type cast with _get_clkdm
ARM: OMAP2+: clock: use driver API instead of direct memory read/write
ARM: OMAP2+: clock: add support for indexed memmaps
ARM: dts: am43xx clock data
ARM: dts: AM35xx: use DT clock data
...
Currently, we are allocating space for two pointers, when we actually
may need to store three of them (two divisors plus the original clock).
Fix this, and change sizeof(type) to sizeof(*var) to keep checkpatch.pl
happy.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Allow drivers to be compiled as modules by exporting more clock
provider functions.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Commit 9807362bfe
"clk: si5351: declare all device IDs for module loading"
removed the common i2c_device_id and introduced new ones for each variant
of the clock generator. Instead of exploiting that information in the driver,
it still depends on platform_data passing the chips .variant.
This removes the now redundant .variant from the platform_data and puts it in
i2c_device_id's .driver_data instead.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
entirely of new platform/driver support. There are some conversions of
existing drivers to the common-clock Device Tree binding, and a few
non-critical fixes to the framework.
Due to an entirely unnecessary cyclical dependency with the arm-soc tree
this pull request is broken into two pieces. The second piece will be
sent out after arm-soc sends you the pull request that merged in core
support for the HiSilicon 3620 platform. That same pull request from
arm-soc depends on this pull request to merge in those HiSilicon bits
without causing build failures.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=Hh66
-----END PGP SIGNATURE-----
Merge tag 'clk-for-linus-3.14-part1' of git://git.linaro.org/people/mike.turquette/linux
Pull clk framework changes from Mike Turquette:
"The first half of the clk framework pull request is made up almost
entirely of new platform/driver support. There are some conversions
of existing drivers to the common-clock Device Tree binding, and a few
non-critical fixes to the framework.
Due to an entirely unnecessary cyclical dependency with the arm-soc
tree this pull request is broken into two pieces. The second piece
will be sent out after arm-soc sends you the pull request that merged
in core support for the HiSilicon 3620 platform. That same pull
request from arm-soc depends on this pull request to merge in those
HiSilicon bits without causing build failures"
[ Just did the ARM SoC merges, so getting ready for the second clk tree
pull request - Linus ]
* tag 'clk-for-linus-3.14-part1' of git://git.linaro.org/people/mike.turquette/linux: (97 commits)
devicetree: bindings: Document qcom,mmcc
devicetree: bindings: Document qcom,gcc
clk: qcom: Add support for MSM8660's global clock controller (GCC)
clk: qcom: Add support for MSM8974's multimedia clock controller (MMCC)
clk: qcom: Add support for MSM8974's global clock controller (GCC)
clk: qcom: Add support for MSM8960's multimedia clock controller (MMCC)
clk: qcom: Add support for MSM8960's global clock controller (GCC)
clk: qcom: Add reset controller support
clk: qcom: Add support for branches/gate clocks
clk: qcom: Add support for root clock generators (RCGs)
clk: qcom: Add support for phase locked loops (PLLs)
clk: qcom: Add a regmap type clock struct
clk: Add set_rate_and_parent() op
reset: Silence warning in reset-controller.h
clk: sirf: re-arch to make the codes support both prima2 and atlas6
clk: composite: pass mux_hw into determine_rate
clk: shmobile: Fix MSTP clock array initialization
clk: shmobile: Fix MSTP clock index
ARM: dts: Add clock provider specific properties to max77686 node
clk: max77686: Register OF clock provider
...
Updates of SoC-near drivers and other driver updates that makes more sense to
take through our tree.
The largest part of this is a conversion of device registration for some
renesas shmobile/sh devices over to use resources. This has required
coordination with the corresponding arch/sh changes, and we've agreed
to merge the arch/sh changes through our tree.
Added in this branch is support for Trusted Foundations secure firmware,
which is what is used on many of the commercial Nvidia Tegra products
that are in the market, including the Nvidia Shield. The code is local
to arch/arm at this time since it's uncertain whether it will be shared
with arm64 longer-term, if needed we will refactor later.
A couple of new RTC drivers used on ARM boards, merged through our tree
on request by the RTC maintainer.
... plus a bunch of smaller updates across the board, gpio conversions
for davinci, etc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=JJlw
-----END PGP SIGNATURE-----
Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM driver updates from Olof Johansson:
"Updates of SoC-near drivers and other driver updates that makes more
sense to take through our tree.
The largest part of this is a conversion of device registration for
some renesas shmobile/sh devices over to use resources. This has
required coordination with the corresponding arch/sh changes, and
we've agreed to merge the arch/sh changes through our tree.
Added in this branch is support for Trusted Foundations secure
firmware, which is what is used on many of the commercial Nvidia Tegra
products that are in the market, including the Nvidia Shield. The
code is local to arch/arm at this time since it's uncertain whether it
will be shared with arm64 longer-term, if needed we will refactor
later.
A couple of new RTC drivers used on ARM boards, merged through our
tree on request by the RTC maintainer.
... plus a bunch of smaller updates across the board, gpio conversions
for davinci, etc"
* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (45 commits)
watchdog: davinci: rename platform driver to davinci-wdt
tty: serial: Limit msm_serial_hs driver to platforms that use it
mmc: msm_sdcc: Limit driver to platforms that use it
usb: phy: msm: Move mach dependent code to platform data
clk: versatile: fixup IM-PD1 clock implementation
clk: versatile: pass a name to ICST clock provider
ARM: integrator: pass parent IRQ to the SIC
irqchip: versatile FPGA: support cascaded interrupts from DT
gpio: davinci: don't create irq_domain in case of unbanked irqs
gpio: davinci: use chained_irq_enter/chained_irq_exit API
gpio: davinci: add OF support
gpio: davinci: remove unused variable intc_irq_num
gpio: davinci: convert to use irqdomain support.
gpio: introduce GPIO_DAVINCI kconfig option
gpio: davinci: get rid of DAVINCI_N_GPIO
gpio: davinci: use {readl|writel}_relaxed() instead of __raw_*
serial: sh-sci: Add OF support
serial: sh-sci: Add device tree bindings documentation
serial: sh-sci: Remove platform data mapbase and irqs fields
serial: sh-sci: Remove platform data scbrr_algo_id field
...
DT and DT-conversion-related changes for various ARM platforms. Most
of these are to enable various devices on various boards, etc, and not
necessarily worth enumerating.
New boards and systems continue to come in as new devicetree files that
don't require corresponding C changes any more, which is indicating that
the system is starting to work fairly well.
A few things worth pointing out:
* ST Ericsson ux500 platforms have made the major push to move over to fully
support the platform with DT.
* Renesas platforms continue their conversion over from legacy platform devices
to DT-based for hardware description.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=4o2d
-----END PGP SIGNATURE-----
Merge tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC DT updates from Olof Johansson:
"DT and DT-conversion-related changes for various ARM platforms. Most
of these are to enable various devices on various boards, etc, and not
necessarily worth enumerating.
New boards and systems continue to come in as new devicetree files
that don't require corresponding C changes any more, which is
indicating that the system is starting to work fairly well.
A few things worth pointing out:
* ST Ericsson ux500 platforms have made the major push to move over
to fully support the platform with DT
* Renesas platforms continue their conversion over from legacy
platform devices to DT-based for hardware description"
* tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (327 commits)
ARM: dts: SiRF: add pin group for USP0 with only RX or TX frame sync
ARM: dts: SiRF: add lost usp1_uart_nostreamctrl pin group for atlas6
ARM: dts: sirf: add lost minigpsrtc device node
ARM: dts: sirf: add clock, frequence-voltage table for CPU0
ARM: dts: sirf: add lost bus_width, clock and status for sdhci
ARM: dts: sirf: add lost clocks for cphifbg
ARM: dts: socfpga: add pl330 clock
ARM: dts: socfpga: update L2 tag and data latency
arm: sun7i: cubietruck: Enable the i2c controllers
ARM: dts: add support for EXYNOS4412 based TINY4412 board
ARM: dts: Add initial support for Arndale Octa board
ARM: bcm2835: add USB controller to device tree
ARM: dts: MSM8974: Add MMIO architected timer node
ARM: dts: MSM8974: Add restart node
ARM: dts: sun7i: external clock outputs
ARM: dts: sun7i: Change 32768 Hz oscillator node name to clk@N style
ARM: dts: sun7i: Add pin muxing options for clock outputs
ARM: dts: sun7i: Add rtp controller node
ARM: dts: sun5i: Add rtp controller node
ARM: dts: sun4i: Add rtp controller node
...
This is the branch where we usually queue up cleanup efforts, moving
drivers out of the architecture directory, header file restructuring,
etc. Sometimes they tangle with new development so it's hard to keep it
strictly to cleanups.
Some of the things included in this branch are:
* Atmel SAMA5 conversion to common clock
* Reset framework conversion for tegra platforms
- Some of this depends on tegra clock driver reworks that are shared with Mike
Turquette's clk tree.
* Tegra DMA refactoring, which are shared branches with the DMA tree.
* Removal of some header files on exynos to prepare for multiplatform
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
iQIcBAABAgAGBQJS4Vf7AAoJEIwa5zzehBx3f9UP/jwMlbfbSZHfNQ/QG0SqZ9RD
zvddyDMHY/qXnzgF3Dax+JR9BDDVy8AlQe713FCoiHJZggWRAbbavkx8gxITDrZQ
6NYaEkkuVxqyM8APl3PwMqYm8UZ8MUf4lCltlOA4jkesY9vue91AFnfyKh2CvHrn
Leg4XT6mFzf/vYDL6RbvTz/Qr253uv3KvYBxkeiRNa0Y7OXRemEXSOfgxh0YGxUl
LZ2IWQFOh/DH4kaeQI8V4G67X3ceHiFyhCnl0CPwfxaZaNBVaxvIFgIUTdetS6Sb
zcXa029tE/Dfsr55vZAv9LUHEipCSOeE5rn2EJWehTWyM7vJ42Eozqgh+zfCjXS7
Ib6g2npsvIluQit/RdITu44h5yZlrQsLgKTGJ8jjXqbT4HQ/746W8b/TP0YLtbw7
N8oqr7k4vsZyF0dAYZQtfQUZeGISz67UbFcdzl9tmYOR7HFuAYkAQYst77zkVJf8
om59BAYYTG5FNjQ4I9AKUfJzxXYveI6AKpXSCCZiahpFM2D1CJIzp9Wi0GwK1HRR
sFVWhS0dajvz63pVVC2tw5Sq4J7onRRNGIXFPoE5fkmlelm0/q0zzGjw3Z0nTqbZ
8zxuwuy2FfPJK11GbUAIhAgn1sCLYyAhl6IE+FsanGeMOSGIMrH0v5/HphAxoCXt
BvqMDogyLoGPce1Gm3pJ
=3CcT
-----END PGP SIGNATURE-----
Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
"This is the branch where we usually queue up cleanup efforts, moving
drivers out of the architecture directory, header file restructuring,
etc. Sometimes they tangle with new development so it's hard to keep
it strictly to cleanups.
Some of the things included in this branch are:
* Atmel SAMA5 conversion to common clock
* Reset framework conversion for tegra platforms
- Some of this depends on tegra clock driver reworks that are shared
with Mike Turquette's clk tree.
* Tegra DMA refactoring, which are shared branches with the DMA tree.
* Removal of some header files on exynos to prepare for
multiplatform"
* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (169 commits)
ARM: mvebu: move Armada 370/XP specific definitions to armada-370-xp.h
ARM: mvebu: remove prototypes of non-existing functions from common.h
ARM: mvebu: move ARMADA_XP_MAX_CPUS to armada-370-xp.h
serial: sh-sci: Rework baud rate calculation
serial: sh-sci: Compute overrun_bit without using baud rate algo
serial: sh-sci: Remove unused GPIO request code
serial: sh-sci: Move overrun_bit and error_mask fields out of pdata
serial: sh-sci: Support resources passed through platform resources
serial: sh-sci: Don't check IRQ in verify port operation
serial: sh-sci: Set the UPF_FIXED_PORT flag
serial: sh-sci: Remove duplicate interrupt check in verify port op
serial: sh-sci: Simplify baud rate calculation algorithms
serial: sh-sci: Remove baud rate calculation algorithm 5
serial: sh-sci: Sort headers alphabetically
ARM: EXYNOS: Kill exynos_pm_late_initcall()
ARM: EXYNOS: Consolidate selection of PM_GENERIC_DOMAINS for Exynos4
ARM: at91: switch Calao QIL-A9260 board to DT
clk: at91: fix pmc_clk_ids data type attriubte
PM / devfreq: use inclusion <mach/map.h> instead of <plat/map-s5p.h>
ARM: EXYNOS: remove <mach/regs-clock.h> for exynos
...
As usual, we have a batch of fixes that weren't considered significant
enough to warrant going into the later -rcs for previous release, so
they are queued up on this branch.
A handful of these are for various DT fixups for Samsung platforms,
and a handful of other minor things.
There are also a couple of stable-marked patches for mvebu -- they came in
quite late and we decided to keep them deferred until the first -stable
release to get more coverage instead of squeezing them into 3.13.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
iQIcBAABAgAGBQJS4VfEAAoJEIwa5zzehBx3AhIP/RSEQSF66w6/BqYI8qJSFU0g
c+4Ubb1i253ayc/bkY43CRVM1iZ9zOFw2O9chogGv6sNmYXOYgJ/R0PQQQyExduK
vbi0O+t2rqv+TeD7p3vFyExe1+oppchfDkiS2dTGchWWjqYS2qQnCYjOT4kgC3TA
zA2aBZ0oOtpa6OVPG1gAKPyHTwbzoXXkqs1PHpS1hyP0OBMYJl8yhfQfqqs0ZhdJ
fHuYjDFnZnLJ8Mm9Ow9XzxzNEioSzYRAwWT/6BY2T6AWixrPTLDZD5RB8d5k5650
O8Od8DyxwHFTSgL+XR1iKaEqe6yd5vYwPmm74Iku/ZlqBQ+7XVEyFHFtOp4xyjy8
dpYho05qTPTkSSQVYC4XO+Vz3G9BPwY4aclUAKONkIYfVQYLWi87WLKjUDY17qVx
9mKAH0f0UP7d00BsVRsM3glSMk1666btySpjDQ8fVlGH9PK1/WiRPh+37q8X9I7I
eslUuE3ykJa9i38Taxr+AN3rn0VnvlGEqkzjSDzq9oYERkoyqzYXyz1/SYM1/4kW
f6Tc3aQemUeJc50jZ8nVNZja4n9I6ChxySP5JBh1qijlQRef475y8ADa0/mXivS2
Kez5DumlajsesiQTqiGY0CClMQajxbrZTVrfUkrr2UkCEX62YLHIB7TpZtepPYXn
TrFoDWZ78CCCPOIC0M8m
=QhN9
-----END PGP SIGNATURE-----
Merge tag 'fixes-nc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC non-critical fixes from Olof Johansson:
"As usual, we have a batch of fixes that weren't considered significant
enough to warrant going into the later -rcs for previous release, so
they are queued up on this branch.
A handful of these are for various DT fixups for Samsung platforms,
and a handful of other minor things.
There are also a couple of stable-marked patches for mvebu -- they
came in quite late and we decided to keep them deferred until the
first -stable release to get more coverage instead of squeezing them
into 3.13"
* tag 'fixes-nc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (32 commits)
ARM: at91: smc: bug fix in sam9_smc_cs_read()
i2c: mv64xxx: Document the newly introduced Armada XP A0 compatible
i2c: mv64xxx: Fix bus hang on A0 version of the Armada XP SoCs
ARM: mvebu: Add quirk for i2c for the OpenBlocks AX3-4 board
ARM: mvebu: Add support to get the ID and the revision of a SoC
ARM: dts: msm: Fix gpio interrupt and reg length
irqchip: sirf: set IRQ_LEVEL status_flags
ARM: OMAP2+: gpmc: Move legacy GPMC width setting
ARM: OMAP2+: gpmc: Introduce gpmc_set_legacy()
ARM: OMAP2+: gpmc: Move initialization outside the gpmc_t condition
ARM: OMAP2+: board-generic: update SoC compatibility strings
Documentation: dt: OMAP: explicitly state SoC compatible strings
ARM: OMAP2+: enable AM33xx SOC EVM audio
ARM: OMAP2+: Select USB PHY for AM335x SoC
ARM: bcm2835: Fix grammar in help message
ARM: msm: trout: fix uninit var warning
ARM: dts: Use MSHC controller for eMMC memory for exynos4412-trats2
ARM: dts: Fix definition of MSHC device tree nodes for exynos4x12
ARM: dts: add clock provider for mshc node for Exynos4412 SOC
clk: samsung: exynos4: Fix definition of div_mmc_pre4 divider
...
Semicolon not needed after switch statement.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
According to Documentation/kbuild/makefiles.txt these symbols
should be clk-qcom-y. Otherwise the build will fail if
CONFIG_COMMON_CLK_QCOM=m. Fix it.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
clk-43xx.c now contains the clock init functionality for am43xx, including
DT clock registration and adding of static clkdev entries.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
clk-3xxx.c now contains the clock init functionality for omap3, including
DT clock registration and adding of static clkdev entries.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
OMAP3 has interface clocks in addition to functional clocks, which
require special handling for the autoidle and idle status register
offsets mainly.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
clk-33xx.c now contains the clock init functionality for am33xx, including
DT clock registration and adding of static clkdev entries.
This patch also moves the omap2_clk_enable_init_clocks declaration to
the driver include, as this is needed by the am33xx clock init code.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
clk-7xx.c now contains the clock init functionality for dra7, including
DT clock registration and adding of static clkdev entries.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The patch adds support for DRA7 PCIe APLL. The APLL
sources the optional functional clocks for PCIe module.
APLL stands for Analog PLL. This is different when comapred
with DPLL meaning Digital PLL, the phase detection is done
using an analog circuit.
Signed-off-by: J Keerthy <j-keerthy@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
USB_DPLL must be initialized and locked at boot so that
USB modules can work.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
clk-54xx.c now contains the clock init functionality for omap5, including
DT clock registration and adding of static clkdev entries.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
clk-44xx.c now contains the clock init functionality for omap4, including
DT clock registration and adding of static clkdev entries.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
ti,mux-clock provides now a binding for basic mux support. This is just
using the basic clock type.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Some OMAP clocks require knowledge about their parent clockdomain for
book keeping purposes. This patch creates a new DT binding for TI
clockdomains, which act as a collection of device clocks. Clockdomain
itself is rather misleading name for the hardware functionality, as at
least on OMAP4 / OMAP5 / DRA7 the clockdomains can be collections of either
clocks and/or IP blocks, thus idle-domain or such might be more appropriate.
For most cases on these SoCs, the kernel doesn't even need the information
and the mappings can be ignored.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This patch adds support for TI specific gate clocks. These behave as basic
gate-clock, but have different ops / hw-ops for controlling the actual
gate, for example waiting until the clock is ready. Several sub-types
are supported:
- ti,gate-clock: basic gate clock with default ops/hwops
- ti,clkdm-gate-clock: clockdomain level gate control
- ti,dss-gate-clock: gate clock with DSS specific hardware handling
- ti,am35xx-gate-clock: gate clock with AM35xx specific hardware handling
- ti,hsdiv-gate-clock: gate clock with OMAP36xx hardware errata handling
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This behaves exactly in similar manner to basic fixed-factor-clock, but
adds a few properties on top for handling clock hardware autoidling.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This patch adds support for TI divider clock binding, which simply uses
the basic clock divider to provide the features needed.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This is a multipurpose clock node, which contains support for multiple
sub-clocks. Uses basic composite clock type to implement the actual
functionality, and TI specific gate, mux and divider clocks.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
TI clk driver now routes some of the basic clocks through own
registration routine to allow autoidle support. This routine just
checks a couple of device node properties and adds autoidle support
if required, and just passes the registration forward to basic clocks.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The OMAP clock driver now supports DPLL clock type. This patch also
adds support for DT DPLL nodes.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
ti_dt_clk_init_provider() can now be used to initialize the contents of
a single clock IP block. This parses all the clocks under the IP block
and calls the corresponding init function for them.
This patch also introduces a helper function for the TI clock drivers
to get register info from DT and append the master IP info to this.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Some devices require their clocks to be available with a specific
dev-id con-id mapping. With DT, the clocks can be found by default
only with their name, or alternatively through the device node of
the consumer. With drivers, that don't support DT fully yet, add
mechanism to register specific clock names.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add a driver for the global clock controller found on MSM8660
based platforms. This should allow most non-multimedia device
drivers to probe and control their clocks.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add a driver for the global clock controller found on MSM 8974
based platforms. This should allow most multimedia device drivers
to probe and control their clocks.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add a driver for the global clock controller found on MSM 8974
based platforms. This should allow most non-multimedia device
drivers to probe and control their clocks.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add a driver for the multimedia clock controller found on MSM
8960 based platforms. This should allow multimedia device drivers
to probe and control their clocks.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add a driver for the global clock controller found on MSM8960
based platforms. This should allow most non-multimedia device
drivers to probe and control their clocks.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Reset controllers and clock controllers are combined into one IP
block on Qualcomm chipsets. Usually a reset signal is associated
with each clock branch but sometimes a reset signal is associated
with a handful of clocks. Either way the register interface is
the same; set a bit to assert a reset and clear a bit to deassert
a reset. Add support for these types of resets signals.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add support for the root clock generators on Qualcomm devices.
RCGs are highly customizable mux/divider/counter clocks that can
be used to generate almost any rate desired given some input
source that is faster than the desired rate.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add support for Qualcomm's PLLs (phase locked loops). This is
sufficient enough to be able to determine the rate the PLL is
running at. We can add rate setting support later when it's
needed.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Add a clock type that associates a regmap pointer and some
enable/disable bits with a clk_hw struct. This will be the struct
that a hw specific implementation wraps if it wants to use the
regmap helper functions.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Some of Qualcomm's clocks can change their parent and rate at the
same time with a single register write. Add support for this
hardware to the common clock framework by adding a new
set_rate_and_parent() op. When the clock framework determines
that both the parent and the rate are going to change during
clk_set_rate() it will call the .set_rate_and_parent() op if
available and fall back to calling .set_parent() followed by
.set_rate() otherwise.
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
sirfprima2 and sirfatlas6 are two different SoCs in CSR SiRF series. for
prima2 and atlas6, there are many shared clocks but there are still
some different register layout and hardware clocks, then result in
different clock table.
here we re-arch the driver to
1. clk-common.c provides common clocks for prima2 and atlas6,
2. clk-prima2.h describles registers of prima2 and clk-prima2.c provides
prima2 specific clocks and clock table.
3. clk-atlas6.h describles registers of atlas6 and clk-atlas6.c provides
atlas6 specific clocks and clock table.
4. clk.h and clk.c expose external interfaces and provide uniform entry
for both prima2 and atlas6.
so both prima2 and atlas6 will get support by drivers/clk/sirf.
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Rongjun Ying <Rongjun.Ying@csr.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The composite clock's .determine_rate implementation can call the
underyling .determine_rate callback corresponding to rate_hw or the
underlying .determine_rate callback corresponding to mux_hw. In both
cases we pass in rate_hw, which is wrong. Fixed by passing mux_hw into
the correct callback.
Reported-by: Lemon Dai <dailemon.gl@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
- a tiny fix for the recent AT91 CCF implementation
- the switch of one platform to DT with board file removal
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
iQEcBAABAgAGBQJSzV2DAAoJEAf03oE53VmQLl0H/2KFQx+lwcg1XWd6Sq05yW7h
PtVKT6bCNZxDXGiUZ1mvZLBkDlVoQn7p35gX+NM05rsad8t9ibdmEutpe4ynPohc
Es5UpQ20txhpzGoDiIIW+pWng+fajtMV1dV8xEC4pf/d4K7HSH8k/tUwZ4GrtaJb
4eUyohznKBHdroavXao1aIuvM+MJvIu2qvxCZZPYDp0LBzTxlHR+ogcCcqO80YSL
dHG2WzbGLr+XMkxpl0bJMF9bxYarg0NsHk+GPqmnOI479rNevptSncbLQRchvwGD
auEAN8I77IwQGUpTuupssKgUrSbOU9JHTwiC2pv8zkaKdoYaIBQVPXCvmyV6kAk=
=KYgN
-----END PGP SIGNATURE-----
Merge tag 'at91-cleanup2' of git://github.com/at91linux/linux-at91 into next/cleanup
From Nicolas Ferre:
Second cleanup pull-request for 3.14:
- a tiny fix for the recent AT91 CCF implementation
- the switch of one platform to DT with board file removal
* tag 'at91-cleanup2' of git://github.com/at91linux/linux-at91:
ARM: at91: switch Calao QIL-A9260 board to DT
clk: at91: fix pmc_clk_ids data type attriubte
Signed-off-by: Kevin Hilman <khilman@linaro.org>
The clks member of the clk_onecell_data structure should
point to a valid clk array (no NULL entries allowed),
and the clk_num should be equal to the number
of elements in the clks array.
The MSTP driver fails to satisfy the above conditions.
The clks array may contain NULL entries if not all
clock-indices are initialized in the device tree.
Thus, if the clock indices are interleaved we end up
with NULL pointers in-between.
The other problem is the driver uses maximum clock index
as the number of clocks, which is incorrect (less than
the actual number of clocks by 1).
Fix the first issue by pre-setting the whole clks array
with ERR_PTR(-ENOENT) pointers instead of zeros; and
use maximum clkidx + 1 as the number of clocks to fix
the other one.
This should make of_clk_src_onecell_get() return the following:
* valid clk pointers for all clocks registered;
* ERR_PTR(-EINVAL) if (idx >= clk_data->clk_num);
* ERR_PTR(-ENOENT) if the clock at the selected index was not
initialized in the device tree (and was not registered).
Changes in V2:
* removed brackets from the one-line for loop
Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Use clkidx when registering MSTP clocks instead of loop counter
since the value is then used to access the specific clock index bit
in the mstp register.
The issue was introduced by the following commit:
f94859c215 "clk: shmobile: Add MSTP clock support"
Changes in V2:
* none
Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
If max77686 chip is instantiated from device tree, it is desirable to
have an OF clock provider to allow device tree based look-up of clocks.
This patch adds OF clock provider registration to the clk-max77686
driver.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
As a prerequisite for further patch adding OF clock provider support to
the driver, this patch changes the driver to store an array of struct
clk * as driver data.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This patch fixes invalid kfree() and adds missing call to clk_unregister()
in error and remove paths in max77686_clk_probe(). While at it, error
handling is also cleaned up.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
As a preparation for further patches, this patch modifies the clock
registration helper function to return a pointer to the newly registered
clock. No functional change is done to the driver.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The function can simply return 0, without jumping to a separate label,
which does exactly the same. This patch does not introduce any
functional change, just a clean-up.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
It is usually nice to know frequency of a clock, so this patch adds a
.recalc_rate() callback returning rates of provided clocks.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Changing status of clock gates in max77686 requires i2c transfers, which
can sleep, so this is done in prepare and unprepare callbacks. Due to
this, checking whether whether the clock is ungated must be done
in is_prepared() callback as well, for consistency.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
