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linux/arch/arm
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Jon Hunter 8c197ccfb6 ARM: OMAP4460: Workaround ABE DPLL failing to turn-on 
With the latest mainline u-boot bootloader (v2012.10), timers (5-8) in
the ABE power domain are failing to turn-on. The timers never come out
of the disabled state when setting the module-mode field to enable.

The problem was exposed when u-boot was updated to NOT configure and
lock the ABE DPLL on start-up. If the ABE DPLL is configured and locked
by u-boot the problem does not occur. However, if the ABE DPLL is in the
idle low-power bypass state and we attempt to enable a timer in the ABE
power domain, it remains stuck in the disabled state. It appears to be a
problem the timer interface clock as this comes from the ABE DPLL.

If we place the ABE DPLL in the MN-bypass state and not the idle
low-power state, then this problem is not seen.

This problem only appears to occur on OMAP4460 and not OMAP4430.

Workaround this problem by locking the ABE DPLL for OMAP4460 in the
kernel on boot. By locking the ABE DPLL, when clocks from the ABE DPLL
are not being requested the DPLL will transition into a low-power stop
mode.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2012-12-15 01:35:50 -07:00
..
boot ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
common Merge branch 'devel-stable' into for-linus 2012-12-11 10:01:53 +00:00
configs ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
crypto
include ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
kernel Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
lib
mach-at91 Sound updates for 3.8-rc1 2012-12-13 11:51:23 -08:00
mach-bcm Add support for generic BCM SoC chipsets 2012-11-19 22:39:07 -08:00
mach-bcm2835 ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
mach-clps711x ARM: clps711x: Rename board files to match functionality 2012-11-21 09:57:46 -08:00
mach-cns3xxx ARM: arm-soc: Non-critical bug fixes 2012-12-12 11:32:16 -08:00
mach-davinci Sound updates for 3.8-rc1 2012-12-13 11:51:23 -08:00
mach-dove ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
mach-ebsa110
mach-ep93xx
mach-exynos ARM: arm-soc: SoC updates, take 2 2012-12-14 14:38:28 -08:00
mach-footbridge
mach-gemini
mach-h720x
mach-highbank Merge branch 'next/cam-samsung' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc 2012-11-30 09:27:57 -08:00
mach-imx ARM: arm-soc: device tree conversions and enablement 2012-12-13 10:39:26 -08:00
mach-integrator ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-12-12 11:30:02 -08:00
mach-kirkwood ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
mach-ks8695
mach-l7200/include/mach
mach-lpc32xx
mach-mmp ARM: mmp: select pinctrl driver 2012-11-21 13:18:04 +08:00
mach-msm
mach-mv78xx0
mach-mvebu arm: mvebu: add L2 cache support 2012-11-27 15:35:05 +00:00
mach-mxs ARM: mxs: Add SchulerControl SPS1 DTS file 2012-11-20 22:09:05 +08:00
mach-netx treewide: Fix typos in various drivers 2012-12-03 11:05:04 +01:00
mach-nomadik
mach-omap1 ARM: arm-soc: power management and clock changes 2012-12-13 10:58:20 -08:00
mach-omap2 ARM: OMAP4460: Workaround ABE DPLL failing to turn-on 2012-12-15 01:35:50 -07:00
mach-orion5x arm: orion5x: convert 'LaCie Ethernet Disk mini v2' to Device Tree 2012-11-21 21:00:51 +00:00
mach-picoxcell
mach-prima2
mach-pxa Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-12-13 19:22:22 -08:00
mach-realview ARM: 7594/1: Add .smp entry for REALVIEW_EB 2012-12-11 00:19:30 +00:00
mach-rpc
mach-s3c24xx Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
mach-s3c64xx Sound updates for 3.8-rc1 2012-12-13 11:51:23 -08:00
mach-s3c2410
mach-s3c2412
mach-s3c2440
mach-s5p64x0 Sound updates for 3.8-rc1 2012-12-13 11:51:23 -08:00
mach-s5pc100 Merge remote-tracking branch 'asoc/topic/samsung' into asoc-next 2012-12-10 00:22:17 +09:00
mach-s5pv210 Sound updates for 3.8-rc1 2012-12-13 11:51:23 -08:00
mach-sa1100 ARM: move serial_sa1100.h header file to linux/platform_data 2012-11-16 11:35:29 +00:00
mach-shark
mach-shmobile ARM: arm-soc: SoC updates, take 2 2012-12-14 14:38:28 -08:00
mach-socfpga
mach-spear3xx ARM: SPEAr3xx: Shirq: Move shirq controller out of plat/ 2012-11-26 16:55:33 +05:30
mach-spear6xx
mach-spear13xx ARM: SPEAr1310: Fix AUXDATA for compact flash controller 2012-11-26 16:55:31 +05:30
mach-sunxi ARM: sunxi: add missing include for mdelay() 2012-11-30 09:56:33 -08:00
mach-tegra Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
mach-u300 ARM: arm-soc: Cleanups on various subarchitectures 2012-12-12 11:51:39 -08:00
mach-ux500 ARM: arm-soc: driver specific changes 2012-12-13 10:59:11 -08:00
mach-versatile
mach-vexpress ARM: arm-soc: driver specific changes 2012-12-13 10:59:11 -08:00
mach-vt8500 ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00
mach-w90x900
mach-zynq ARM: zynq: Remove all unused mach headers 2012-11-21 10:52:21 +01:00
mm ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-12-12 18:07:07 -08:00
nwfpe
oprofile
plat-iop
plat-mxc/devices ARM : i.MX27 : split code for allocation of ressources of camera and eMMA 2012-11-16 16:21:48 +01:00
plat-omap ARM: arm-soc: power management and clock changes 2012-12-13 10:58:20 -08:00
plat-orion ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
plat-pxa ARM: pxa: remove pxa95x support 2012-11-15 13:50:13 +01:00
plat-s3c24xx Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
plat-samsung ARM: arm-soc: SoC updates, take 2 2012-12-14 14:38:28 -08:00
plat-spear ARM: SPEAr3xx: Shirq: Move shirq controller out of plat/ 2012-11-26 16:55:33 +05:30
plat-versatile ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
tools
vfp
xen Features: 2012-12-13 14:29:16 -08:00
Kconfig ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
Kconfig-nommu
Kconfig.debug ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00
Makefile ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00