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linux/drivers/rtc
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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
..
class.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-12-05 16:53:43 -08:00
hctosys.c
interface.c RTC: Avoid races between RTC alarm wakeup and suspend. 2012-08-08 20:49:16 +02:00
Kconfig Merge branch 'akpm' (Andrew's patch-bomb) 2012-07-30 17:25:34 -07:00
Makefile rtc: Add rtc support to 88PM80X PMIC 2012-07-09 15:17:43 +02:00
rtc-88pm80x.c rtc/rtc-88pm80x: remove unneed devm_kfree 2012-07-31 18:42:50 -07:00
rtc-88pm860x.c Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
rtc-ab3100.c
rtc-ab8500.c drivers/rtc/rtc-ab8500.c: remove fix for AB8500 ED version 2012-07-30 17:25:18 -07:00
rtc-at32ap700x.c
rtc-at91rm9200.c ARM: at91: fix new build errors 2012-07-04 13:56:48 +02:00
rtc-at91sam9.c ARM: at91: fix rtc-at91sam9 irq issue due to sparse irq support 2012-08-23 14:55:45 +02:00
rtc-au1xxx.c
rtc-bfin.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-bq32k.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-bq4802.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-cmos.c RTC: Avoid races between RTC alarm wakeup and suspend. 2012-08-08 20:49:16 +02:00
rtc-coh901331.c drivers/rtc/rtc-coh901331.c: use devm allocation 2012-07-30 17:25:17 -07:00
rtc-core.h
rtc-da9052.c rtc/rtc-da9052: remove unneed devm_kfree call 2012-07-30 17:25:18 -07:00
rtc-davinci.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-dev.c
rtc-dm355evm.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-ds1216.c
rtc-ds1286.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-ds1302.c
rtc-ds1305.c rtc: convert rtc spi drivers to module_spi_driver 2012-03-23 16:58:39 -07:00
rtc-ds1307.c rtc: ds1307: add trickle charger support 2012-05-29 16:22:33 -07:00
rtc-ds1374.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-ds1390.c rtc: convert rtc spi drivers to module_spi_driver 2012-03-23 16:58:39 -07:00
rtc-ds1511.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-ds1553.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-ds1672.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-ds1742.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-ds3232.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-ds3234.c rtc: convert rtc spi drivers to module_spi_driver 2012-03-23 16:58:39 -07:00
rtc-efi.c drivers/rtc/rtc-efi.c: fix section mismatch warning 2012-04-12 13:12:12 -07:00
rtc-em3027.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-ep93xx.c drivers/rtc/rtc-ep93xx.c: convert to use module_platform_driver() 2012-05-29 16:22:33 -07:00
rtc-fm3130.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-generic.c
rtc-imxdi.c rtc: imx dryice: Add missing clk_prepare 2012-04-25 17:03:44 +02:00
rtc-isl1208.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-isl12022.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-jz4740.c drivers/rtc/rtc-jz4740.c: make jz4740_rtc_driver static 2012-01-10 16:30:53 -08:00
rtc-lib.c rtc: Initialized rtc_time->tm_isdst 2011-08-26 17:26:35 -07:00
rtc-lpc32xx.c drivers/rtc/rtc-lpc32xx.c: add device tree support 2012-05-29 16:22:34 -07:00
rtc-ls1x.c MIPS: add RTC support for loongson1B 2012-03-23 16:58:39 -07:00
rtc-m41t80.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-m41t93.c drivers/rtc/rtc-m41t93.c: don't let get_time() reset M41T93_FLAG_OF 2012-05-29 16:22:33 -07:00
rtc-m41t94.c rtc: convert rtc spi drivers to module_spi_driver 2012-03-23 16:58:39 -07:00
rtc-m48t35.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-m48t59.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-m48t86.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-max6900.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-max6902.c rtc: convert rtc spi drivers to module_spi_driver 2012-03-23 16:58:39 -07:00
rtc-max8925.c mfd: Transfer rtc max8925 irq from MFD defined resources 2012-07-09 00:16:10 +02:00
rtc-max8998.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-mc13xxx.c rtc/mc13xxx: add support for the rtc in the mc34708 pmic 2012-07-30 17:25:18 -07:00
rtc-mpc5121.c rtc: Fix possible null pointer dereference in rtc-mpc5121.c 2012-04-26 11:17:01 +02:00
rtc-mrst.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-msm6242.c
rtc-mv.c ARM: Kirkwood: Replace mrvl with marvell 2012-07-25 17:06:23 +02:00
rtc-mxc.c drivers/rtc/rtc-mxc.c: fix irq enabled interrupts warning 2012-07-11 16:04:46 -07:00
rtc-nuc900.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-omap.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-pcap.c
rtc-pcf2123.c drivers/rtc/rtc-pcf2123.c: initialize dynamic sysfs attributes 2012-08-21 16:45:03 -07:00
rtc-pcf8563.c drivers/rtc/rtc-pcf8563.c: add device tree support 2012-07-30 17:25:19 -07:00
rtc-pcf8583.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-pcf50633.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-pl030.c Merge branch 'amba' of git://git.linaro.org/people/rmk/linux-arm 2012-03-23 17:36:29 -07:00
rtc-pl031.c rtc: pl031: fix up IRQ flags 2012-07-30 17:25:18 -07:00
rtc-pm8xxx.c drivers/rtc/rtc-pm8xxx.c: make pm8xxx_rtc_pm_ops static 2012-03-23 16:58:39 -07:00
rtc-proc.c
rtc-ps3.c
rtc-puv3.c rtc-puv3: solve section mismatch in rtc-puv3.c 2012-01-10 10:29:42 +08:00
rtc-pxa.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-r9701.c drivers/rtc/rtc-r9701.c: check that r9701_set_datetime() succeeded 2012-07-30 17:25:18 -07:00
rtc-rp5c01.c
rtc-rs5c313.c
rtc-rs5c348.c drivers/rtc/rtc-rs5c348.c: fix hour decoding in 12-hour mode 2012-08-21 16:45:03 -07:00
rtc-rs5c372.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-rv3029c2.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-rx8025.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-rx8581.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-s3c.c drivers/rtc/rtc-s3c.c: replace #include header files from asm/* to linux/* 2012-07-30 17:25:18 -07:00
rtc-s35390a.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00
rtc-sa1100.c ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
rtc-sh.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-spear.c drivers/rtc/rtc-spear.c: fix use-after-free in spear_rtc_remove() 2012-07-11 16:04:41 -07:00
rtc-starfire.c
rtc-stk17ta8.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-stmp3xxx.c rtc: stmp3xxx: Add simple binding for the stmp3xxx-rtc 2012-07-03 13:22:36 +08:00
rtc-sun4v.c
rtc-sysfs.c
rtc-tegra.c drivers/rtc/rtc-tegra.c: clean up probe/remove routines 2012-05-29 16:22:34 -07:00
rtc-test.c
rtc-tile.c
rtc-twl.c drivers/rtc/rtc-twl.c: ensure all interrupts are disabled during probe 2012-09-17 15:00:38 -07:00
rtc-tx4939.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-v3020.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-vr41xx.c drivers/rtc: remove IRQF_DISABLED 2012-03-23 16:58:39 -07:00
rtc-vt8500.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-wm831x.c rtc: wm831x: Feed the write counter into device_add_randomness() 2012-07-19 10:38:31 -04:00
rtc-wm8350.c rtc: convert drivers/rtc/* to use module_platform_driver() 2012-01-10 16:30:53 -08:00
rtc-x1205.c rtc: convert rtc i2c drivers to module_i2c_driver 2012-03-23 16:58:39 -07:00