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android_kernel_motorola_sm6225/arch/arm/mach-omap2
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Paul Walmsley 3c82e229f0 OMAP3 clock: correct module IDLEST bits: SSI; DSS; USBHOST; HSOTGUSB 
Fix two bugs in the OMAP3 clock tree pertaining to the SSI, DSS,
USBHOST, and HSOTGUSB devices.  These devices are both interconnect
initiators and targets.  Without this patch, clk_enable()s on clocks for
these modules can be very high latency (potentially up to ~200
milliseconds) and message such as the following are generated:

    Clock usbhost_48m_fck didn't enable in 100000 tries

Two bugs are fixed by this patch.  First, OMAP hardware only supports
target CM_IDLEST register bits on ES2+ chips and beyond.  ES1 chips
should not wait for these clocks to enable.  So, split the appropriate
clocks into ES1 and ES2+ variants, so that kernels running on ES1
devices won't try to wait.

Second, the current heuristic in omap2_clk_dflt_find_idlest() will
fail for these clocks.  It assumes that the CM_IDLEST bit to wait upon
is the same as the CM_*CLKEN bit, which is false[1].  Fix by
implementing custom clkops .find_idlest function pointers for the
appropriate clocks that return the correct slave IDLEST bit shift.

This was originally fixed in the linux-omap kernel during 2.6.29 in a
slightly different manner[2][3].

In the medium-term future, all of the module IDLEST code will
eventually be moved to the omap_hwmod code.

Problem reported by Jarkko Nikula <jhnikula@gmail.com>:

    http://marc.info/?l=linux-omap&m=124306184903679&w=2

...

1. See for example 34xx TRM Revision P Table 4-213 and 4-217 (for the
   DSS case).

2. http://www.spinics.net/lists/linux-omap/msg05512.html et seq.

3. http://lkml.indiana.edu/hypermail/linux/kernel/0901.3/01498.html


Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Jarkko Nikula <jhnikula@gmail.com>
2009-07-24 20:10:36 -06:00
..
board-2430sdp.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
board-3430sdp.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
board-4430sdp.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
board-apollon.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
board-generic.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
board-h4.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
board-ldp.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
board-omap3beagle.c OMAP3: Setup MUX settings for SDRC CKE signals 2009-07-24 19:43:25 -06:00
board-omap3evm.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
board-omap3pandora.c OMAP3: Setup MUX settings for SDRC CKE signals 2009-07-24 19:43:25 -06:00
board-overo.c OMAP3: Setup MUX settings for SDRC CKE signals 2009-07-24 19:43:25 -06:00
board-rx51-peripherals.c OMAP3: RX51: Use OneNAND sync read / write 2009-06-23 13:30:25 +03:00
board-rx51.c OMAP3: Setup MUX settings for SDRC CKE signals 2009-07-24 19:43:25 -06:00
board-zoom-debugboard.c ARM: OMAP3: Add support for OMAP3 Zoom2 board 2009-05-28 14:04:04 -07:00
board-zoom2.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
clock.c OMAP2/3 clock: split, rename omap2_wait_clock_ready() 2009-07-24 20:10:35 -06:00
clock.h OMAP2/3 clock: split, rename omap2_wait_clock_ready() 2009-07-24 20:10:35 -06:00
clock24xx.c OMAP2 clock: 2430 I2CHS uses non-standard CM_IDLEST register 2009-07-24 20:10:36 -06:00
clock24xx.h OMAP2 clock: 2430 I2CHS uses non-standard CM_IDLEST register 2009-07-24 20:10:36 -06:00
clock34xx.c OMAP3 clock: correct module IDLEST bits: SSI; DSS; USBHOST; HSOTGUSB 2009-07-24 20:10:36 -06:00
clock34xx.h OMAP3 clock: correct module IDLEST bits: SSI; DSS; USBHOST; HSOTGUSB 2009-07-24 20:10:36 -06:00
clockdomain.c [ARM] omap: ensure that failing power domain lookups produce errors 2009-02-23 14:55:34 +00:00
clockdomains.h OMAP3: PM: D2D clockdomain supports SW supervised transitions 2009-05-28 10:59:08 -07:00
cm-regbits-24xx.h [ARM] OMAP2 PRCM: clean up CM_IDLEST bits 2009-02-08 17:50:37 +00:00
cm-regbits-34xx.h OMAP3: PM: Add D2D clocks and auto-idle setup to PRCM init 2009-05-28 10:59:07 -07:00
cm.h ARM: OMAP2/3: Remove OMAP_CM_REGADDR 2009-05-25 11:26:46 -07:00
control.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
devices.c ARM: OMAP2: Fix SPI driver failure on 2420 when running multi-omap config 2009-05-12 11:20:30 -07:00
gpmc-onenand.c OMAP2/3: gpmc-onenand: correct use of async timings 2009-06-23 13:30:24 +03:00
gpmc-smc91x.c ARM: OMAP2/3: Add generic smc91x support when connected to GPMC 2009-05-28 13:23:52 -07:00
gpmc.c ARM: OMAP4: Add minimal support for omap4 2009-05-28 14:16:04 -07:00
id.c OMAP2/3: Add omap_type() for determining GP/EMU/HS 2009-06-23 13:30:23 +03:00
io.c OMAP3 SDRC: add support for 2 SDRAM chip selects 2009-07-24 19:43:25 -06:00
iommu2.c omap iommu: omap2 architecture specific functions 2009-05-05 14:52:39 +03:00
irq.c OMAP: Add new function to check wether there is irq pending 2009-05-28 10:59:04 -07:00
Kconfig ARM: OMAP4: Add support for 4430 SDP 2009-05-28 14:16:05 -07:00
mailbox.c OMAP2/3: omap mailbox: platform_get_irq() error ignored 2009-06-23 13:30:22 +03:00
Makefile ARM: OMAP4: SMP: Enable SMP support for OMAP4430 2009-06-09 13:04:06 +05:30
Makefile.boot [ARM] 3145/1: OMAP 3a/5: Add support for omap24xx 2005-11-10 14:26:51 +00:00
mcbsp.c [ARM] omap: mcbsp: convert to use fck/ick clocks directly 2009-02-08 17:50:19 +00:00
mmc-twl4030.c OMAP2/3: mmc-twl4030: use correct controller in twl_mmc23_set_power 2009-06-23 13:30:22 +03:00
mmc-twl4030.h ARM: OMAP3: mmc-twl4030 uses regulator framework 2009-05-28 14:04:03 -07:00
mux.c OMAP3: Setup MUX settings for SDRC CKE signals 2009-07-24 19:43:25 -06:00
omap-headsmp.S ARM: OMAP4: SMP: Add OMAP4430 SMP board files 2009-06-09 13:03:50 +05:30
omap-smp.c ARM: OMAP4: SMP: Add OMAP4430 SMP board files 2009-06-09 13:03:50 +05:30
omap3-iommu.c omap iommu: add MPU_BRIDGE_IOMMU for tidspbridge migration 2009-05-22 10:17:02 +03:00
pm-debug.c OMAP2/3: PM: push core PM code from linux-omap 2009-05-28 10:58:50 -07:00
pm.h OMAP2/3: PM: push core PM code from linux-omap 2009-05-28 10:58:50 -07:00
pm24xx.c OMAP3: PM: UART: disable clocks when idle and off-mode support 2009-05-28 10:59:06 -07:00
pm34xx.c OMAP3: PM: prevent module wakeups from waking IVA2 2009-05-28 10:59:10 -07:00
powerdomain.c OMAP2 clock/powerdomain: off by 1 error in loop timeout comparisons 2009-06-19 19:09:32 -06:00
powerdomains.h [ARM] OMAP3 powerdomains: make USBTLL SAR only available on ES3.1 and beyond 2009-02-23 14:52:51 +00:00
powerdomains24xx.h ARM: OMAP2: Powerdomain: Add OMAP2 powerdomains 2008-08-19 11:08:42 +03:00
powerdomains34xx.h [ARM] OMAP3 powerdomains: make USBTLL SAR only available on ES3.1 and beyond 2009-02-23 14:52:51 +00:00
prcm-common.h OMAP2/3: PM: push core PM code from linux-omap 2009-05-28 10:58:50 -07:00
prcm.c OMAP2/3 clock: split, rename omap2_wait_clock_ready() 2009-07-24 20:10:35 -06:00
prm-regbits-24xx.h ARM: OMAP2: Powerdomain: Add OMAP2 powerdomains 2008-08-19 11:08:42 +03:00
prm-regbits-34xx.h ARM: OMAP3: Fix HW SAVEANDRESTORE shift define 2009-05-16 08:28:17 -07:00
prm.h OMAP3: PM: prevent module wakeups from waking IVA2 2009-05-28 10:59:10 -07:00
sdram-micron-mt46h32m32lf-6.h ARM: OMAP3: SDRC: add timing data for Micron MT46H32M32LF-6, v2 2009-05-28 14:03:59 -07:00
sdram-qimonda-hyb18m512160af-6.h ARM: OMAP3: SDRC: add timing data for Qimonda HYB18M512160AF-6 2009-05-28 14:03:59 -07:00
sdrc.c OMAP2/3 SDRC: don't set SDRC_POWER.PWDENA on boot 2009-07-24 19:44:01 -06:00
sdrc.h [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
sdrc2xxx.c ARM: OMAP2/3: Remove OMAP_PRM_REGADDR and OMAP2_PRM_BASE 2009-05-25 11:26:42 -07:00
serial.c Merge branch 'omap4' into for-next 2009-05-28 15:45:14 -07:00
sleep24xx.S OMAP2/3: PM: push core PM code from linux-omap 2009-05-28 10:58:50 -07:00
sleep34xx.S OMAP2/3: PM: push core PM code from linux-omap 2009-05-28 10:58:50 -07:00
sram34xx.S OMAP3 SDRC: Move the clk stabilization delay to the right place 2009-07-24 20:10:35 -06:00
sram242x.S ARM: OMAP2/3: Remove OMAP_PRM_REGADDR and OMAP2_PRM_BASE 2009-05-25 11:26:42 -07:00
sram243x.S ARM: OMAP2/3: Remove OMAP_PRM_REGADDR and OMAP2_PRM_BASE 2009-05-25 11:26:42 -07:00
timer-gp.c ARM: OMAP4: SMP: Add mpu timer support for OMAP4430 2009-06-09 13:03:59 +05:30
timer-mpu.c ARM: OMAP4: SMP: Add mpu timer support for OMAP4430 2009-06-09 13:03:59 +05:30
usb-musb.c OMAP3: PM: Ensure MUSB block can idle when driver not loaded 2009-05-28 10:59:09 -07:00
usb-tusb6010.c ARM: OMAP2: Fix tusb6010 init error and compilation warning 2009-05-12 11:20:02 -07:00