Thanks help from Aubrey. We can fix this bug in platform gpio driver instead of modifying general gpio_keys.c.
BRs Zheng Qi PEG->IPG->EIG SH IO/LPSS team -----Original Message----- From: Li, Aubrey Sent: Friday, October 9, 2015 10:48 AM To: Zheng, Qi <[email protected]>; Dmitry Torokhov <[email protected]>; Linus Walleij <[email protected]> Cc: Zha, Qipeng <[email protected]>; Linux Input <[email protected]> Subject: RE: [PATCH] input:gpio-key: set IRQF_NO_SUSPEND for wake capable key On Friday, October 09, 2015 10:14 AM, Zheng, Qi wrote: > > Hi, > > "enable_irq_wake" is to enable/disable power-management wake-on of an > IRQ. > It is wake-on control not interrupt enable control. > In my opinion, to make sure the keys press working when system > suspend, both wake-on and interrupt should be enabled. > Besides, for many platforms, the gpio irq chip don't implement the > method "enable_irq_wake" by setting "IRQCHIP_SKIP_SET_WAKE". > So, I think "IRQF_NO_SUSPEND" is necessary for this case. We had a discussion on this before. Here is the thread: https://lkml.org/lkml/2014/7/8/970 device_init_wakeup() is a general interface and supposed to be used to enable wakeup for the wakeup sources. How gpio keys probe and call device_init_wakeup() is a good reference for your case. Thanks, -Aubrey > > BRs > > Zheng Qi > PEG->IPG->EIG SH IO/LPSS team > > -----Original Message----- > From: Dmitry Torokhov [mailto:[email protected]] > Sent: Saturday, October 3, 2015 1:42 AM > To: Linus Walleij <[email protected]> > Cc: Zha, Qipeng <[email protected]>; Linux Input > <[email protected]>; Zheng, Qi <[email protected]>; Li, > Aubrey <[email protected]> > Subject: Re: [PATCH] input:gpio-key: set IRQF_NO_SUSPEND for wake > capable key > > On Fri, Oct 02, 2015 at 03:26:27AM -0700, Linus Walleij wrote: > > On Thu, Sep 17, 2015 at 9:06 AM, Qipeng Zha <[email protected]> > wrote: > > > > > When wakeup attribute is set, GPIO key is supposed to wake up the > > > system from system sleep state, So set IRQF_NO_SUSPEND flag to > > > keep IRQ enabled during suspend. > > > > > > Signed-off-by: Qi Zheng <[email protected]> > > > Signed-off-by: Aubrey Li <[email protected]> > > > Signed-off-by: Qipeng Zha <[email protected]> > > > > Reviewed-by: Linus Walleij <[email protected]> > > > > Should this not be tagged for stable? > > I do not believe we need this at all. Otherwise every single driver > for devices that might be wakeup sources needs this flag set. Which > would basically means it is a noop and we should not suspend IRQ threads by > default. > > The dirver correctly calls enable_irq_wake() and platform should do > whatever it needs to make sure wakeup interrupt will be serviced. > > Thanks. > > -- > Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
