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ff2516fbef
kernel_optimize_test/arch/arm
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Paul Walmsley ff2516fbef OMAP2+: wd_timer: disable on boot via hwmod postsetup mechanism 
The OMAP watchdog timer IP blocks require a specific set of register
writes to occur before they will be disabled[1], even if the device
clocks appear to be disabled in the CM_*CLKEN registers.  In the MPU
watchdog case, failure to execute this reset sequence will eventually
cause the watchdog to reset the OMAP unexpectedly.

Previously, the code to disable this watchdog was manually called from
mach-omap2/devices.c during device initialization.  This causes the
watchdog to be unconditionally disabled for a portion of kernel
initialization.  This should be controllable by the board-*.c files,
since some system integrators will want full watchdog coverage of
kernel initialization.  Also, the watchdog disable code was not
connected to the hwmod shutdown code.  This means that calling
omap_hwmod_shutdown() will not, in fact, disable the watchdog, and the
goal of omap_hwmod_shutdown() is to be able to shutdown any on-chip
OMAP device.

To resolve the latter problem, populate the pre_shutdown pointer in
the watchdog timer hwmod classes with a function that executes the
watchdog shutdown sequence.  This allows the hwmod code to fully
disable the watchdog.

Then, to allow some board files to support watchdog coverage
throughout kernel initialization, add common code to mach-omap2/io.c
to cause the MPU watchdog to be disabled on boot unless a board file
specifically requests it to remain enabled.  Board files can do this
by changing the watchdog timer hwmod's postsetup state between the
omap2_init_common_infrastructure() and omap2_init_common_devices()
function calls.

1. OMAP34xx Multimedia Device Silicon Revision 3.1.x Rev. ZH
   [SWPU222H], Section 16.4.3.6, "Start/Stop Sequence for WDTs (Using
   WDTi.WSPR Register)"

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Charulatha Varadarajan <charu@ti.com>
2010-12-21 19:57:40 -07:00
..
boot ARM: 6503/1: Thumb-2: Restore sensible zImage header layout for CONFIG_THUMB2_KERNEL 2010-11-30 13:44:26 +00:00
common ARM: 6524/1: GIC irq desciptor bug fix 2010-12-06 11:03:31 +00:00
configs omap1: Delete old defconfigs 2010-12-10 09:46:55 -08:00
include/asm Merge branches 'devel-iommu-mailbox' and 'devel-l2x0' into omap-for-linus 2010-12-20 19:13:40 -08:00
kernel ARM: 6519/1: kuser: Fix incorrect cmpxchg syscall in kuser helpers 2010-12-04 11:01:12 +00:00
lib ARM: 6482/2: Fix find_next_zero_bit and related assembly 2010-11-24 20:17:46 +00:00
mach-aaec2000 ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-at91 at91: Refactor Stamp9G20 and PControl G20 board file 2010-12-17 12:10:39 +01:00
mach-bcmring ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-clps711x ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-cns3xxx ARM: cns3xxx: Fix build with CONFIG_PCI=y 2010-11-29 19:19:15 +03:00
mach-davinci ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-dove arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-ebsa110 ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-ep93xx ARM: 6462/1: EP93xx: Document DMA M2P API 2010-11-07 16:13:30 +00:00
mach-footbridge ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-gemini arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-h720x ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-imx ARM i.MX27 eukrea: Fix compilation 2010-11-15 09:25:05 +01:00
mach-integrator ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-iop13xx ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-iop32x ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-iop33x ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-ixp4xx ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-ixp23xx ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-ixp2000 ARM: 6460/1: ixp2000: fix type of ixp2000_timer_interrupt 2010-10-27 21:40:28 +01:00
mach-kirkwood ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-ks8695 arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-l7200/include/mach arm: return both physical and virtual addresses from addruart 2010-10-20 00:27:33 -04:00
mach-lh7a40x arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-loki arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-lpc32xx Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2010-10-21 16:42:32 -07:00
mach-mmp ARM: mmp2: remove not used clk_rtc 2010-11-30 20:14:03 +08:00
mach-msm ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-mv78xx0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/nico/orion 2010-11-07 16:10:56 +00:00
mach-mx3 ARM i.MX pcm037 eet: compile fixes 2010-11-15 09:25:03 +01:00
mach-mx5 Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel-stable 2010-10-28 11:13:00 +01:00
mach-mx25 mx25: fix spi device registration typo 2010-11-15 09:25:06 +01:00
mach-mxc91231 arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-netx ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-nomadik arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-ns9xxx arm: return both physical and virtual addresses from addruart 2010-10-20 00:27:33 -04:00
mach-nuc93x arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-omap1 Merge branch 'devel-dma' into omap-for-linus 2010-12-21 16:48:20 -08:00
mach-omap2 OMAP2+: wd_timer: disable on boot via hwmod postsetup mechanism 2010-12-21 19:57:40 -07:00
mach-orion5x ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-pnx4008 ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-pxa ARM: pxa/palm: fix ifdef around gen_nand driver registration 2010-11-30 20:14:05 +08:00
mach-realview ARM: 6507/1: RealView: Correct data alignment in headsmp.S for CONFIG_THUMB2_KERNEL 2010-11-30 13:44:27 +00:00
mach-rpc ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-s3c24a0/include/mach Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable 2010-10-28 12:27:34 +01:00
mach-s3c64xx ARM: S3C64XX: fix uart clock setup for mini6410/real6410 2010-11-25 10:58:11 +09:00
mach-s3c2400
mach-s3c2410 ARM: S3C2410: Adapt h1940-bluetooth to gpiolib changes 2010-11-25 10:58:10 +09:00
mach-s3c2412 ARM S3C24XX: Fix compilation of PM code for S3C2416 2010-12-17 14:45:01 +09:00
mach-s3c2416 ARM S3C24XX: Fix compilation of PM code for S3C2416 2010-12-17 14:45:01 +09:00
mach-s3c2440 ARM: S3C24XX: Fix mess with gpio {set,get}_pull callbacks 2010-12-08 01:04:56 +00:00
mach-s3c2443 ARM: S3C2443: Select properly ARM core type 2010-11-30 08:44:09 +00:00
mach-s5p64x0 Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable 2010-10-28 12:27:34 +01:00
mach-s5p6442 Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable 2010-10-28 12:27:34 +01:00
mach-s5pc100 Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable 2010-10-28 12:27:34 +01:00
mach-s5pv210 ARM: S5PV210: update MAX8998 platform data to get rid of WARN() 2010-12-17 14:47:42 +09:00
mach-s5pv310 Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable 2010-10-28 12:27:34 +01:00
mach-sa1100 ARM: 6449/1: Fix for compiler warning of uninitialized variable. 2010-10-27 21:40:28 +01:00
mach-shark ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-shmobile ARM: mach-shmobile: INTC interrupt priority level demux fix 2010-12-17 19:42:47 +09:00
mach-spear3xx
mach-spear6xx
mach-stmp37xx arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-stmp378x arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-tcc8k arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mach-tegra ARM: io: make iounmap() a simple macro 2010-12-08 13:57:04 +00:00
mach-u300 Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6 2010-11-01 07:50:43 -04:00
mach-ux500 ARM: 6473/1: Small update to ux500 specific L2 cache code 2010-11-21 22:05:56 +00:00
mach-versatile ARM: 6484/1: fix compile warning in mm/init.c 2010-11-21 22:05:56 +00:00
mach-vexpress ARM: 6508/1: vexpress: Correct data alignment in headsmp.S for CONFIG_THUMB2_KERNEL 2010-11-30 13:44:27 +00:00
mach-w90x900 arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
mm ARM: 6535/1: V6 MPCore v6_dma_inv_range and v6_dma_flush_range RWFO fix 2010-12-14 22:23:34 +00:00
nwfpe Update broken web addresses in arch directory. 2010-10-18 11:03:21 +02:00
oprofile oprofile: Abstract the perf-events backend 2010-10-11 17:46:16 +02:00
plat-iop ARM: 6523/1: iop: ensure sched_clock() is notrace 2010-12-04 13:36:29 +00:00
plat-mxc ARM i.MX spi: fix compilation for i.MX21 2010-11-15 09:25:04 +01:00
plat-nomadik ARM: 6488/1: nomadik: prevent sched_clock() wraparound 2010-11-21 22:05:57 +00:00
plat-omap OMAP2+: hwmod: fix a warning, add some docs, remove unused fields 2010-12-21 19:55:13 -07:00
plat-orion [ARM] Kirkwood: restrict the scope of the PCIe reset workaround 2010-10-21 15:52:03 -04:00
plat-pxa mmc: sdhci: 8-bit bus width changes 2010-11-22 15:12:04 -05:00
plat-s3c24xx ARM: S3C24XX: Fix CONFIG_S3C_DEV_NAND Kconfig entry 2010-12-17 14:44:54 +09:00
plat-s5p ARM: S5P: Add initial map for GPIO2 and GPIO3 2010-10-25 16:06:22 +09:00
plat-samsung ARM: S3C24XX: Fix mess with gpio {set,get}_pull callbacks 2010-12-08 01:04:56 +00:00
plat-spear arm: return both physical and virtual addresses from addruart 2010-10-20 00:27:33 -04:00
plat-stmp3xxx arm: return both physical and virtual addresses from addruart 2010-10-20 00:27:33 -04:00
plat-tcc arm: return both physical and virtual addresses from addruart 2010-10-20 00:27:33 -04:00
plat-versatile
tools ARM: Update mach-types 2010-12-12 23:31:02 +00:00
vfp ARM: 6498/1: vfp: Correct data alignment for CONFIG_THUMB2_KERNEL 2010-11-30 13:44:23 +00:00
Kconfig ARM: 6534/1: Make CONFIG_FPE_NWFPE depend on !CONFIG_THUMB2_KERNEL 2010-12-14 22:23:34 +00:00
Kconfig-nommu
Kconfig.debug Merge branch 'devel-stable' into devel 2010-10-19 22:06:36 +01:00
Makefile Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable 2010-10-19 20:12:24 +01:00