kernel-ark/drivers
Kevin Hilman 8dcebaa9a0 drivers/rtc/rtc-twl.c: ensure all interrupts are disabled during probe
On some platforms, bootloaders are known to do some interesting RTC
programming.  Without going into the obscurities as to why this may be
the case, suffice it to say the the driver should not make any
assumptions about the state of the RTC when the driver loads.  In
particular, the driver probe should be sure that all interrupts are
disabled until otherwise programmed.

This was discovered when finding bursty I2C traffic every second on
Overo platforms.  This I2C overhead was keeping the SoC from hitting
deep power states.  The cause was found to be the RTC firing every
second on the I2C-connected TWL PMIC.

Special thanks to Felipe Balbi for suggesting to look for a rogue driver
as the source of the I2C traffic rather than the I2C driver itself.

Special thanks to Steve Sakoman for helping track down the source of the
continuous RTC interrups on the Overo boards.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Tested-by: Steve Sakoman <steve@sakoman.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Tested-by: Shubhrajyoti Datta <omaplinuxkernel@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-17 15:00:38 -07:00
..
accessibility
acpi ACPI / PM: Use KERN_DEBUG when no power resources are found 2012-09-14 20:54:44 +02:00
amba Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-07-27 15:14:26 -07:00
ata ahci: Add identifiers for ASM106x devices 2012-09-13 00:24:29 -04:00
atm drivers/atm/iphase.c: fix error return code 2012-08-06 13:29:57 -07:00
auxdisplay
base mm: cma: fix alignment requirements for contiguous regions 2012-08-28 21:01:01 +02:00
bcma bcma: BCM43228 support 2012-08-02 13:51:46 -04:00
block nbd: clear waiting_queue on shutdown 2012-09-17 15:00:37 -07:00
bluetooth Bluetooth: Add support for Apple vendor-specific devices 2012-08-27 08:36:42 -05:00
cdrom
char drm/i915: fix hsw uncached pte 2012-08-17 09:21:35 +02:00
clk clk: validate pointer in __clk_disable() 2012-07-30 17:25:13 -07:00
clocksource cs5535-clockevt: typo, it's MFGPT, not MFPGT 2012-08-21 16:45:02 -07:00
connector
cpufreq Merge branch 'imx/fixes-for-3.6' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes 2012-08-23 17:02:42 +02:00
cpuidle cpuidle: Prevent null pointer dereference in cpuidle_coupled_cpu_notify 2012-08-17 19:37:08 +02:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-09-12 07:14:17 +08:00
dca
devfreq
dio
dma dma: tegra: enable/disable dma clock 2012-08-13 10:15:22 +05:30
edac Merge branch 'devel' 2012-07-29 21:11:05 -03:00
eisa
extcon This is the remaining MFD fixes for 3.6, with 5 pending fixes: 2012-09-16 13:22:21 -07:00
firewire - Small fixes and optimizations. 2012-07-30 09:32:39 -07:00
firmware This patch series contains a major revamp of how we collect entropy 2012-07-31 19:07:42 -07:00
gpio gpio: rdc321x: Prevent removal of modules exporting active GPIOs 2012-09-01 12:52:24 +02:00
gpu drm/nouveau: fix booting with plymouth + dumb support 2012-09-14 15:45:01 +10:00
hid Merge branch 'upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2012-09-07 12:29:38 -07:00
hsi
hv This patch series contains a major revamp of how we collect entropy 2012-07-31 19:07:42 -07:00
hwmon hwmon: (ina2xx) Fix word size register read and write operations 2012-09-12 06:42:11 -07:00
hwspinlock
i2c Merge branch 'i2c-embedded/for-current' of git://git.pengutronix.de/git/wsa/linux 2012-09-14 17:55:57 -07:00
ide ide: fix generic_ide_suspend/resume Oops 2012-08-21 14:54:42 -07:00
idle intel_idle: Check cpu_idle_get_driver() for NULL before dereferencing it. 2012-08-17 19:37:14 +02:00
ieee802154
iio drivers/iio/adc/at91_adc.c: adjust inconsistent IS_ERR and PTR_ERR 2012-08-27 21:15:25 +01:00
infiniband Merge branches 'cma', 'ipoib', 'misc', 'mlx4', 'ocrdma', 'qib' and 'srp' into for-next 2012-08-16 09:38:39 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-09-08 16:20:59 -07:00
iommu iommu/amd: Fix wrong check for ARRAY_SIZE() 2012-08-10 11:34:08 +02:00
isdn mISDN: Fix wrong usage of flush_work_sync while holding locks 2012-09-13 14:58:54 -04:00
leds leds: renesas: fix error handling 2012-08-13 14:34:02 +08:00
lguest
macintosh
md md/raid10: fix problem with on-stack allocation of r10bio structure. 2012-08-18 09:51:42 +10:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-08-21 16:54:38 -07:00
memory
memstick
message drivers/message/i2o/i2o_config.c: bound allocation 2012-07-30 17:25:17 -07:00
mfd This is the remaining MFD fixes for 3.6, with 5 pending fixes: 2012-09-16 13:22:21 -07:00
misc drivers/misc/sgi-xp/xpc_uv.c: SGI XPC fails to load when cpu 0 is out of IRQ resources 2012-08-21 16:45:03 -07:00
mmc mmc: omap: fix broken PIO mode 2012-09-04 13:58:11 -04:00
mtd UBI: fix a horrible memory deallocation bug 2012-09-04 09:40:26 +03:00
net bnx2x: Add missing afex code 2012-09-13 16:37:52 -04:00
nfc
nubus
of dt: introduce for_each_available_child_of_node, of_get_next_available_child 2012-08-20 02:16:00 -07:00
oprofile
parisc
parport
pci PCI: Don't print anything while decoding is disabled 2012-08-23 10:53:08 -06:00
pcmcia Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-07-27 15:14:26 -07:00
pinctrl pinctrl/nomadik: add kp_b_2 keyboard function group list 2012-08-17 11:09:58 +02:00
platform thinkpad_acpi: buffer overflow in fan_get_status() 2012-09-13 16:46:31 -04:00
pnp
power Merge branch 'for-linus-3.6' of git://dev.laptop.org/users/dilinger/linux-olpc 2012-08-02 11:52:39 -07:00
pps pps: return PTR_ERR on error in device_create 2012-07-30 17:25:21 -07:00
ps3
ptp
pwm pwm: pwm-tiehrpwm: Fix conflicting channel period setting 2012-09-10 17:04:38 +02:00
rapidio rapidio/tsi721: fix unused variable compiler warning 2012-08-21 16:45:03 -07:00
regulator This is the remaining MFD fixes for 3.6, with 5 pending fixes: 2012-09-16 13:22:21 -07:00
remoteproc
rpmsg
rtc drivers/rtc/rtc-twl.c: ensure all interrupts are disabled during probe 2012-09-17 15:00:38 -07:00
s390 s390/dasd: fix ioctl return value 2012-08-28 10:08:31 +02:00
sbus
scsi [SCSI] Fix 'Device not ready' issue on mpt2sas 2012-08-22 09:42:54 +04:00
sfi
sh sh: intc: Handle domain association for sparseirq pre-allocated vectors. 2012-08-09 13:21:05 +09:00
sn
spi Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2012-08-25 11:45:04 -07:00
ssb
staging This is the remaining MFD fixes for 3.6, with 5 pending fixes: 2012-09-16 13:22:21 -07:00
target target: go through normal processing for zero-length REQUEST_SENSE 2012-09-07 11:32:54 -07:00
tc
thermal The tag contains just a few battery-related changes for v3.6. It's is 2012-07-31 18:08:25 -07:00
tty tty: serial: imx: don't reinit clock in imx_setup_ufcr() 2012-09-05 12:44:44 -07:00
uio
usb Merge branch 'chipidea-stable' into usb-linus 2012-09-12 11:12:31 -07:00
uwb
vfio vfio: grab vfio_device reference *before* exposing the sucker via fd_install() 2012-08-22 10:26:42 -04:00
vhost tcm_vhost: Fix vhost_scsi_target structure alignment 2012-08-20 14:52:11 -07:00
video OMAPFB: fix framebuffer console colors 2012-08-23 12:37:22 +00:00
virt
virtio
vlynq
vme
w1 1-Wire: Add support for the maxim ds1825 temperature sensor 2012-08-16 12:33:59 -07:00
watchdog watchdog: da9052: Remove duplicate inclusion of delay.h 2012-08-29 17:13:06 +02:00
xen xen/pciback: Fix proper FLR steps. 2012-09-06 09:22:02 -04:00
zorro
Kconfig vfio: VFIO core 2012-07-31 08:16:22 -06:00
Makefile vfio: VFIO core 2012-07-31 08:16:22 -06:00