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linux/drivers/i2c/busses
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Neil Brown b4fde5e7ed I2C: OMAP: Fix timeout problem during suspend. 
On a board with OMAP3 processor and TWL4030 Power management,
we need to talk to the TWL4030 during late suspend but cannot
because the I2C interrupt is disabled (as late suspend disables
interrupt).

e.g. I get messages like:

[   62.161102] musb-omap2430 musb-omap2430: LATE power domain suspend
[   63.167205] omap_i2c omap_i2c.1: controller timed out
[   63.183044] twl: i2c_read failed to transfer all messages
[   64.182861] omap_i2c omap_i2c.1: controller timed out
[   64.198455] twl: i2c_write failed to transfer all messages
[   65.198455] omap_i2c omap_i2c.1: controller timed out
[   65.203765] twl: i2c_write failed to transfer all messages

The stack shows omap2430_runtime_suspend calling twl4030_set_suspend
which tries to power-down the USB PHY (twl4030_phy_suspend ->
twl4030_phy_power -> __twl4030_phy_power which as a nice WARN_ON
that helps).

Then we get the same in resume:

[   69.603912] musb-omap2430 musb-omap2430: EARLY power domain resume
[   70.610473] omap_i2c omap_i2c.1: controller timed out
[   70.626129] twl: i2c_write failed to transfer all messages
etc.

So don't disable interrupts for I2C.

Acked-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
 		2012-07-08 12:49:15 +02:00
..
Kconfig Merge branch 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux 2012-05-26 13:35:03 -07:00
Makefile i2c: ixp2000: remove driver 2012-05-12 14:28:14 +02:00
i2c-acorn.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
i2c-ali15x3.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-ali1535.c i2c-ali1535: enable SPARC support 2012-01-12 20:32:04 +01:00
i2c-ali1563.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-amd756-s4882.c
…
i2c-amd756.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-amd8111.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-at91.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-au1550.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-bfin-twi.c i2c: irq: Remove IRQF_DISABLED 2011-10-29 09:55:45 +01:00
i2c-cpm.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-davinci.c i2c: davinci: Free requested IRQ in remove 2012-05-12 20:36:24 +02:00
i2c-designware-core.c i2c: designware: Add support for 16bit register access 2012-05-12 14:28:11 +02:00
i2c-designware-core.h i2c: designware: Add support for 16bit register access 2012-05-12 14:28:11 +02:00
i2c-designware-pcidrv.c i2c: prevent spurious interrupt on Designware controllers 2012-04-10 08:09:03 -07:00
i2c-designware-platdrv.c i2c: designware: Add clk_{un}prepare() support 2012-05-12 14:28:15 +02:00
i2c-diolan-u2c.c USB: convert some miscellanies drivers to use module_usb_driver() 2011-11-18 09:52:10 -08:00
i2c-eg20t.c i2c: eg20t: don't use strcpy but strlcpy 2012-05-12 14:28:14 +02:00
i2c-elektor.c Fix common misspellings 2011-03-31 11:26:23 -03:00
i2c-gpio.c i2c: Dynamically assign adapter id if it wasn't explictly specified 2012-05-12 14:28:11 +02:00
i2c-highlander.c Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-01-14 12:32:16 -08:00
i2c-hydra.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-i801.c i2c-i801: Use usleep_range to wait for command completion 2012-03-26 21:47:19 +02:00
i2c-ibm_iic.c Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-01-14 12:32:16 -08:00
i2c-ibm_iic.h
…
i2c-imx.c Merge branch 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux 2012-05-26 13:35:03 -07:00
i2c-intel-mid.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-iop3xx.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-iop3xx.h i2c-iop3xx: add iomem annotation 2011-01-04 00:53:37 +00:00
i2c-isch.c i2c-isch: Decrease delay in command completion check loop 2012-03-26 21:47:18 +02:00
i2c-mpc.c i2c-mpc: avoid I2C abnormal after resuming from deep sleep 2012-05-12 14:28:12 +02:00
i2c-mv64xxx.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-mxs.c arm-soc: device tree conversions, part 2 2012-05-26 12:57:47 -07:00
i2c-nforce2-s4985.c
…
i2c-nforce2.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-nomadik.c Merge branches 'for-32/i2c/nomadik', 'for-32/i2c/s3c2410-dt' and 'for-32/i2c/tegra-iomem' into for-linus/i2c-3.2 2011-11-01 00:54:17 +00:00
i2c-nuc900.c i2c: Split I2C_M_NOSTART support out of I2C_FUNC_PROTOCOL_MANGLING 2012-05-30 10:55:34 +02:00
i2c-ocores.c i2c: ocores: register OF i2c devices 2012-05-12 16:49:54 +02:00
i2c-octeon.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-omap.c I2C: OMAP: Fix timeout problem during suspend. 2012-07-08 12:49:15 +02:00
i2c-parport-light.c i2c-parport: Various cleanups 2011-05-24 20:58:49 +02:00
i2c-parport.c i2c-parport: Various cleanups 2011-05-24 20:58:49 +02:00
i2c-parport.h i2c-parport: Various cleanups 2011-05-24 20:58:49 +02:00
i2c-pasemi.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-pca-isa.c i2c-pca: Fix waitforcompletion() return value 2010-09-30 14:14:22 +02:00
i2c-pca-platform.c i2c: Dynamically assign adapter id if it wasn't explictly specified 2012-05-12 14:28:11 +02:00
i2c-piix4.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-pmcmsp.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-pnx.c i2c: pnx: add device tree support 2012-05-12 14:28:14 +02:00
i2c-powermac.c i2c/powermac: Register i2c devices from device-tree 2012-04-30 15:37:17 +10:00
i2c-puv3.c i2c-puv3: using module_platform_driver() 2012-01-10 10:29:41 +08:00
i2c-pxa-pci.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-pxa.c i2c-pxa: Drop leftover comment 2012-05-12 14:28:11 +02:00
i2c-s3c2410.c i2c: Split I2C_M_NOSTART support out of I2C_FUNC_PROTOCOL_MANGLING 2012-05-30 10:55:34 +02:00
i2c-s6000.c i2c: Change mail address of Oskar Schirmer 2012-05-17 15:15:56 +02:00
i2c-s6000.h i2c: Change mail address of Oskar Schirmer 2012-05-17 15:15:56 +02:00
i2c-scmi.c i2c-scmi: Provide module aliases for automatic loading 2010-03-24 14:38:39 +01:00
i2c-sh7760.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-sh_mobile.c i2c: sh_mobile: add device tree support 2012-05-12 14:28:12 +02:00
i2c-sibyte.c i2c/mips: Fix error return codes from Sibyte i2c bus driver 2010-07-10 09:42:47 +02:00
i2c-simtec.c i2c/busses: Use module_platform_driver() 2012-01-12 20:32:04 +01:00
i2c-sirf.c i2c: add CSR SiRFprimaII on-chip I2C controllers driver 2012-03-07 19:05:04 +01:00
i2c-sis96x.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-sis630.c Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-01-14 12:32:16 -08:00
i2c-sis5595.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-stu300.c i2c: irq: Remove IRQF_DISABLED 2011-10-29 09:55:45 +01:00
i2c-stub.c i2c-stub: Expose the default functionality flags 2010-05-21 18:40:56 +02:00
i2c-taos-evm.c i2c-taos-evm: Fix log messages 2011-06-29 11:36:10 +02:00
i2c-tegra.c i2c: tegra: notify transfer-complete after clearing status. 2012-05-12 16:10:12 +02:00
i2c-tiny-usb.c USB: convert some miscellanies drivers to use module_usb_driver() 2011-11-18 09:52:10 -08:00
i2c-versatile.c i2c: Dynamically assign adapter id if it wasn't explictly specified 2012-05-12 14:28:11 +02:00
i2c-via.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
i2c-viapro.c Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-01-14 12:32:16 -08:00
i2c-xiic.c I2C: xiic: Add OF binding support 2012-05-12 14:28:18 +02:00
i2c-xlr.c i2c: Support for Netlogic XLR/XLS I2C controller. 2012-02-24 22:25:57 +01:00
scx200_acb.c i2c: Convert to DEFINE_PCI_DEVICE_TABLE 2012-01-12 20:32:04 +01:00
scx200_i2c.c i2c: Use <linux/io.h> instead of <asm/io.h> 2010-05-21 18:41:01 +02:00