Commit graph

21 commits

Author SHA1 Message Date
Vaibhav Hiremath
7764d0cdc3 clk: s2mps11: Use kcalloc instead of kzalloc for array allocation
This patch cleans up the driver for,

  - Use devm_kcalloc() variant instead of devm_kzalloc() for array
    allocation.
  - clk_prepare()/unprepare(), remove "ret" variable as it is not required
  - use __exit for cleanup function

As I am referring this driver as a reference for my 88pm800 clk driver,
applying same changes here as well.

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-28 11:59:32 -07:00
Axel Lin
264e3b75de clk: s2mps11: Simplify s2mps11_clk_probe unwind paths
The devm_clk_unregister() in .probe error case is not necessary as it will
be automatically called when probe fails.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-28 11:58:46 -07:00
Russell King
079ed3681d clk: s2mps11: use clkdev_create()
clkdev_create() is a shorter way to write clkdev_alloc() followed by
clkdev_add().  Use this instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-05-06 11:58:59 +01:00
Linus Torvalds
bfc7249cc2 Please consider pulling the clk framework changes toward 3.19. It is
much later than usual due to several last minute bugs that had to be
 addressed. As usual the majority of changes are new drivers and
 modifications to existing drivers. The core recieved many fixes along
 with the groundwork for several large changes coming in the future which
 will better parition clock providers from clock consumers.
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Merge tag 'clk-for-linus-3.19' of git://git.linaro.org/people/mike.turquette/linux

Pull clk framework updates from Mike Turquette:
 "This is much later than usual due to several last minute bugs that had
  to be addressed.  As usual the majority of changes are new drivers and
  modifications to existing drivers.  The core recieved many fixes along
  with the groundwork for several large changes coming in the future
  which will better parition clock providers from clock consumers"

* tag 'clk-for-linus-3.19' of git://git.linaro.org/people/mike.turquette/linux: (86 commits)
  clk: samsung: Fix Exynos 5420 pinctrl setup and clock disable failure due to domain being gated
  ARM: OMAP3: clock: fix boot breakage in legacy mode
  ARM: OMAP2+: clock: fix DPLL code to use new determine rate APIs
  clk: Really fix deadlock with mmap_sem
  clk: mmp: fix sparse non static symbol warning
  clk: Change clk_ops->determine_rate to return a clk_hw as the best parent
  clk: change clk_debugfs_add_file to take a struct clk_hw
  clk: Don't expose __clk_get_accuracy
  clk: Don't try to use a struct clk* after it could have been freed
  clk: Remove unused function __clk_get_prepare_count
  clk: samsung: Fix double add of syscore ops after driver rebind
  clk: samsung: exynos4: set parent of sclk_hdmiphy to hdmi
  clk: samsung: exynos4415: Fix build with PM_SLEEP disabled
  clk: samsung: remove unnecessary inclusion of header files from clk.h
  clk: samsung: remove unnecessary CONFIG_OF from clk.c
  clk: samsung: Spelling s/bwtween/between/
  clk: rockchip: Add support for the mmc clock phases using the framework
  clk: rockchip: add bindings for the mmc clocks
  clk: rockchip: rk3288 export i2s0_clkout for use in DT
  clk: rockchip: use clock ID for DMC (memory controller) on rk3288
  ...
2014-12-20 16:42:36 -08:00
Linus Torvalds
e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00
Michael Turquette
ffa3a37a61 Immutable branch between MFD, Regulator and Clk, due for v3.19
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Merge tag 'ib-mfd-regulator-clk-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into clk-next

Immutable branch between MFD, Regulator and Clk, due for v3.19
2014-11-28 21:11:10 -08:00
kbuild test robot
250d07d1e7 clk: clk-s2mps11: fix semicolon.cocci warnings
drivers/clk/clk-s2mps11.c:181:2-3: Unneeded semicolon

 Removes unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

CC: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-25 17:27:41 -08:00
Chanwoo Choi
f928b53d74 clk: s2mps11: Add the support for S2MPS13 PMIC clock
This patch adds the support for S2MPS13 PMIC clock which is same with existing
S2MPS14 RTC IP. But, S2MPS13 uses all of clocks (32khz_{ap|bt|cp}).

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-11-25 15:55:11 +00:00
Wolfram Sang
a4ae8f3b0f clk: drop owner assignment from platform_drivers
A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-20 16:20:22 +02:00
Mike Turquette
cdae1730d0 Merge branch 'clk-fixes' into clk-next 2014-07-03 11:55:42 -07:00
Karol Wrona
89ed7e6e68 clk: s2mps11: Fix clk_ops
s2mps11 clocks had registered callbacks for prepare ,unprepare and is_enabled.
During disabling unused clocks the lack of is_prepared caused that unused
s2mps11 clocks were not unprepared and stayed active.

Regmap_read is cached so it can be called in is_prepare callback
to achieve this information. Enabled field was removed from struct s2mps11_clk.

Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-02 09:44:47 -07:00
Krzysztof Kozlowski
2a96dfa49c clk: s2mps11: Fix double free corruption during driver unbind
After unbinding the driver memory was corrupted by double free of
clk_lookup structure. This lead to OOPS when re-binding the driver
again.

The driver allocated memory for 'clk_lookup' with devm_kzalloc. During
driver removal this memory was freed twice: once by clkdev_drop() and
second by devm code.

Kernel panic log:
[   30.839284] Unable to handle kernel paging request at virtual address 5f343173
[   30.846476] pgd = dee14000
[   30.849165] [5f343173] *pgd=00000000
[   30.852703] Internal error: Oops: 805 [#1] PREEMPT SMP ARM
[   30.858166] Modules linked in:
[   30.861208] CPU: 0 PID: 1 Comm: bash Not tainted 3.16.0-rc2-00239-g94bdf617b07e-dirty #40
[   30.869364] task: df478000 ti: df480000 task.ti: df480000
[   30.874752] PC is at clkdev_add+0x2c/0x38
[   30.878738] LR is at clkdev_add+0x18/0x38
[   30.882732] pc : [<c0350908>]    lr : [<c03508f4>]    psr: 60000013
[   30.882732] sp : df481e78  ip : 00000001  fp : c0700ed8
[   30.894187] r10: 0000000c  r9 : 00000000  r8 : c07b0e3c
[   30.899396] r7 : 00000002  r6 : df45f9d0  r5 : df421390  r4 : c0700d6c
[   30.905906] r3 : 5f343173  r2 : c0700d84  r1 : 60000013  r0 : c0700d6c
[   30.912417] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   30.919534] Control: 10c53c7d  Table: 5ee1406a  DAC: 00000015
[   30.925262] Process bash (pid: 1, stack limit = 0xdf480240)
[   30.930817] Stack: (0xdf481e78 to 0xdf482000)
[   30.935159] 1e60:                                                       00001000 df6de610
[   30.943321] 1e80: df7f4558 c0355650 c05ec6ec c0700eb0 df6de600 df7f4510 dec9d69c 00000014
[   30.951480] 1ea0: 00167b48 df6de610 c0700e30 c0713518 00000000 c0700e30 dec9d69c 00000006
[   30.959639] 1ec0: 00167b48 c02c1b7c c02c1b64 df6de610 c07aff48 c02c0420 c06fb150 c047cc20
[   30.967798] 1ee0: df6de610 df6de610 c0700e30 df6de644 c06fb150 0000000c dec9d690 c02bef90
[   30.975957] 1f00: dec9c6c0 dece4c00 df481f80 dece4c00 0000000c c02be73c 0000000c c016ca8c
[   30.984116] 1f20: c016ca48 00000000 00000000 c016c1f4 00000000 00000000 b6f18000 df481f80
[   30.992276] 1f40: df7f66c0 0000000c df480000 df480000 b6f18000 c011094c df47839c 60000013
[   31.000435] 1f60: 00000000 00000000 df7f66c0 df7f66c0 0000000c df480000 b6f18000 c0110dd4
[   31.008594] 1f80: 00000000 00000000 0000000c b6ec05d8 0000000c b6f18000 00000004 c000f2a8
[   31.016753] 1fa0: 00001000 c000f0e0 b6ec05d8 0000000c 00000001 b6f18000 0000000c 00000000
[   31.024912] 1fc0: b6ec05d8 0000000c b6f18000 00000004 0000000c 00000001 00000000 00167b48
[   31.033071] 1fe0: 00000000 bed83a80 b6e004f0 b6e5122c 60000010 00000001 ffffffff ffffffff
[   31.041248] [<c0350908>] (clkdev_add) from [<c0355650>] (s2mps11_clk_probe+0x2b4/0x3b4)
[   31.049223] [<c0355650>] (s2mps11_clk_probe) from [<c02c1b7c>] (platform_drv_probe+0x18/0x48)
[   31.057728] [<c02c1b7c>] (platform_drv_probe) from [<c02c0420>] (driver_probe_device+0x13c/0x384)
[   31.066579] [<c02c0420>] (driver_probe_device) from [<c02bef90>] (bind_store+0x88/0xd8)
[   31.074564] [<c02bef90>] (bind_store) from [<c02be73c>] (drv_attr_store+0x20/0x2c)
[   31.082118] [<c02be73c>] (drv_attr_store) from [<c016ca8c>] (sysfs_kf_write+0x44/0x48)
[   31.090016] [<c016ca8c>] (sysfs_kf_write) from [<c016c1f4>] (kernfs_fop_write+0xc0/0x17c)
[   31.098176] [<c016c1f4>] (kernfs_fop_write) from [<c011094c>] (vfs_write+0xa0/0x1c4)
[   31.105899] [<c011094c>] (vfs_write) from [<c0110dd4>] (SyS_write+0x40/0x8c)
[   31.112931] [<c0110dd4>] (SyS_write) from [<c000f0e0>] (ret_fast_syscall+0x0/0x3c)
[   31.120481] Code: e2842018 e584501c e1a00004 e885000c (e5835000)
[   31.126596] ---[ end trace efad45bfa3a61b05 ]---
[   31.131181] Kernel panic - not syncing: Fatal exception
[   31.136368] CPU1: stopping
[   31.139054] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G      D       3.16.0-rc2-00239-g94bdf617b07e-dirty #40
[   31.148697] [<c0016480>] (unwind_backtrace) from [<c0012950>] (show_stack+0x10/0x14)
[   31.156419] [<c0012950>] (show_stack) from [<c0480db8>] (dump_stack+0x80/0xcc)
[   31.163622] [<c0480db8>] (dump_stack) from [<c001499c>] (handle_IPI+0x130/0x15c)
[   31.170998] [<c001499c>] (handle_IPI) from [<c000862c>] (gic_handle_irq+0x60/0x68)
[   31.178549] [<c000862c>] (gic_handle_irq) from [<c0013480>] (__irq_svc+0x40/0x70)
[   31.186009] Exception stack(0xdf4bdf88 to 0xdf4bdfd0)
[   31.191046] df80:                   ffffffed 00000000 00000000 00000000 df4bc000 c06d042c
[   31.199207] dfa0: 00000000 ffffffed c06d03c0 00000000 c070c288 00000000 00000000 df4bdfd0
[   31.207363] dfc0: c0010324 c0010328 60000013 ffffffff
[   31.212402] [<c0013480>] (__irq_svc) from [<c0010328>] (arch_cpu_idle+0x28/0x30)
[   31.219783] [<c0010328>] (arch_cpu_idle) from [<c005f150>] (cpu_startup_entry+0x2c4/0x3f0)
[   31.228027] [<c005f150>] (cpu_startup_entry) from [<400086c4>] (0x400086c4)
[   31.234968] ---[ end Kernel panic - not syncing: Fatal exception

Fixes: 7cc560dea4 ("clk: s2mps11: Add support for s2mps11")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-01 21:56:49 -07:00
Krzysztof Kozlowski
e8b60a45a5 clk: s2mps11: Add support for S2MPS14 clocks
This patch adds support for S2MPS14 PMIC clocks (BT and AP) to the
s2mps11 clock driver.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-05-23 15:44:03 -07:00
Krzysztof Kozlowski
7002483c7b clk: s2mps11: Remove useless check for clk_table
There is no need for checking if 'clk_table' is not NULL twice (first
after allocation and second at the end of probe()). Also move allocation
of this 'clk_table' to probe from s2mps11_clk_parse_dt as this is
logical place for it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-05-23 15:44:03 -07:00
Krzysztof Kozlowski
bf416bd457 clk: s2mps11: Add missing of_node_put and of_clk_del_provider
Add of_clk_del_provider to remove previously registered clock provider.
Add of_node_put to decrement the ref count of clock nodes.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-05-23 15:44:02 -07:00
Krzysztof Kozlowski
afbd1a0c30 clk: s2mps11: Use of_get_child_by_name
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>
2014-03-24 15:11:27 -07:00
Krzysztof Kozlowski
238e14055d clk: s2mps11: Fix possible NULL pointer dereference
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>
2014-03-24 15:11:27 -07:00
Tushar Behera
e8e6b840c4 clk: clk-s2mps11: Add support for clocks in S5M8767 MFD
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>
2014-03-18 17:13:24 -07:00
Tushar Behera
64d64c3573 clk: clk-s2mps11: Refactor for including support for other MFD clocks
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>
2014-03-18 17:13:16 -07:00
Krzysztof Kozlowski
1b1ccee1e8 mfd: s2mps11: Fix build after regmap field rename in sec-core.c
Fix building of s2mps11 regulator and clock drivers after renaming
regmap field in struct sec_pmic_dev in commit:
 - "mfd/rtc: s5m: Fix register updating by adding regmap for RTC"

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-12-16 11:30:39 +00:00
Yadwinder Singh Brar
7cc560dea4 clk: s2mps11: Add support for s2mps11
This patch adds support to register three(AP/CP/BT) buffered 32.768 KHz
outputs of mfd-s2mps11 with common clock framework.

Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-08-08 15:57:33 -07:00