Re: [PATCH v4 3/4] gpio: brcmstb: support wakeup from S5 cold boot

From: Linus Walleij
Date: Thu Aug 13 2015 - 07:12:37 EST

On Sat, Aug 1, 2015 at 3:17 AM, Gregory Fong <gregory.0xf0@xxxxxxxxx> wrote:

> For wake from S5, we need to:
> - register a reboot handler
> - set wakeup capability before requesting IRQ so wakeup count is
> incremented
> - mask all GPIO IRQs and clear any pending interrupts during driver
> probe to since no driver will yet be registered to handle any IRQs
> carried over from boot at that time, and it's possible that the
> booted kernel does not request the same IRQ anyway.
> This means that /sys/.../power/wakeup_count is valid at boot time, and
> we can properly account for S5 wakeup stats. e.g.:
> ### After waking from S5 from a GPIO key
> # cat /sys/bus/platform/drivers/brcmstb-gpio/f04172c0.gpio/power/wakeup
> enabled
> # cat /sys/bus/platform/drivers/brcmstb-gpio/f04172c0.gpio/power/wakeup_count
> 1
> Signed-off-by: Gregory Fong <gregory.0xf0@xxxxxxxxx>
> ---
> v4: rename __brcmstb_gpio_irq_set_wake() to brcmstb_gpio_priv_set_wake().

Patch applied.

Linus Walleij
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