[Letux-kernel] [PATCH] mfd: twl-core: disable irq while suspended
lee.jones at linaro.org
Tue Apr 2 05:52:44 CEST 2019
On Sat, 23 Feb 2019, Andreas Kemnade wrote:
> Since commit
> 6e2bd956936 ("i2c: omap: Use noirq system sleep pm ops to idle device for suspend")
> on gta04 we have handle_twl4030_pih() called in situations where pm_runtime_get()
> in i2c-omap.c returns -EACCES.
> [ 86.474365] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done.
> [ 86.485473] printk: Suspending console(s) (use no_console_suspend to debug)
> [ 86.555572] Disabling non-boot CPUs ...
> [ 86.555664] Successfully put all powerdomains to target state
> [ 86.563720] twl: Read failed (mod 1, reg 0x01 count 1)
> [ 86.563751] twl4030: I2C error -13 reading PIH ISR
> [ 86.563812] twl: Read failed (mod 1, reg 0x01 count 1)
> [ 86.563812] twl4030: I2C error -13 reading PIH ISR
> [ 86.563873] twl: Read failed (mod 1, reg 0x01 count 1)
> [ 86.563903] twl4030: I2C error -13 reading PIH ISR
> This happens when we wakeup via something behing twl4030
> (powerbutton or rtc alarm).
> This goes on for minutes until the system is finally resumed.
> Disable the irq on suspend and enable it on resume to avoid
> having i2c access problems when the irq registers are checked.
> Signed-off-by: Andreas Kemnade <andreas at kemnade.info>
> drivers/mfd/twl-core.c | 23 +++++++++++++++++++++++
> 1 file changed, 23 insertions(+)
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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