From: Geert Uytterhoeven Date: Thu, 5 Feb 2015 15:49:09 +0000 (+0100) Subject: gpio: pcf857x: Propagate wake-up setting to parent irq controller X-Git-Tag: omap-for-v4.1/fixes-rc1~104^2~56 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b80eef95beb04760629822fa130aeed54cdfafca;p=pandora-kernel.git gpio: pcf857x: Propagate wake-up setting to parent irq controller The pcf857x GPIO and interrupt controller uses dummy_irq_chip, which does not implement irq_chip.irq_set_wake() and does not set IRQCHIP_SKIP_SET_WAKE. This causes two s2ram issues if wake-up is enabled for the pcf857x GPIO pins: 1. During resume from s2ram, the following warning is printed: WARNING: CPU: 0 PID: 1046 at kernel/irq/manage.c:537 irq_set_irq_wake+0x9c/0xf8() Unbalanced IRQ 113 wake disable 2. Wake-up through the pcf857x GPIO pins may fail, as the parent interrupt controller may be suspended. Migrate the pcf857x GPIO and interrupt controller from dummy_irq_chip to its own irq_chip. This irq chip implements irq_chip.irq_set_wake() to propagate its wake-up setting to the parent interrupt controller. This fixes wake-up through gpio-keys on sh73a0/kzm9g, where the pcf857x interrupt is cascaded to irq-renesas-intc-irqpin, and the latter must not be suspended when wake-up is enabled. Signed-off-by: Geert Uytterhoeven Signed-off-by: Linus Walleij --- Reading git-diff-tree failed