From mboxrd@z Thu Jan 1 00:00:00 1970 From: jayakumar.lkml@gmail.com (Jaya Kumar) Date: Fri, 2 Apr 2010 16:00:00 +0800 Subject: PXA168 suspend/resume issue and set_wake Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Arm friends, A quick question for you. I am experimenting with a PXA168 device and noticed some odd behaviour with resume. The device can suspend and can then be resumed, at least to serial console level after a gpio button press. But then as part of the resume, I see some messages about unbalanced IRQ wake disable. Then after that, button presses no longer generate any interrupts. The irq count remains what it was at the point of suspend. I took a quick scan at the PXA168 source code and noticed: pxa168.c: pxa_init_gpio(IRQ_PXA168_GPIOX, 0, 127, NULL); So no set_wake function, which I think explains the unbalanced IRQ wake messages since gpio-keys would have tried to enable_irq_wake on suspend which would do nothing since above has no set_wake and then on resume gpio-keys would try to disable_irq_wake and cause the unbalanced IRQ wake disable. But I haven't quite understood why the buttons fail to cause any interrupts after that. Has anyone encountered anything similar and if so any patches I could look at? Thanks, jaya