On czw, 2014-06-19 at 20:20 +0200, Javier Martinez Canillas wrote:
> From: Doug Anderson <diand...@chromium.org>
>
> The max77686 includes an RTC that keeps power during suspend. It's
> convenient to be able to use it as a wakeup source.
>
> Signed-off-by: Doug Anderson <diand...@chromium.org>
> ---
> drivers/rtc/rtc-max77686.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
> index d20a7f0..c1c6055 100644
> --- a/drivers/rtc/rtc-max77686.c
> +++ b/drivers/rtc/rtc-max77686.c
> @@ -583,6 +583,33 @@ static void max77686_rtc_shutdown(struct platform_device
> *pdev)
> #endif /* MAX77686_RTC_WTSR_SMPL */
> }
>
> +#ifdef CONFIG_PM_SLEEP
> +static int max77686_rtc_suspend(struct device *dev)
> +{
> + if (device_may_wakeup(dev)) {
> + struct max77686_rtc_info *info = dev_get_drvdata(dev);
> +
> + return enable_irq_wake(info->virq);
> + }
> +
> + return 0;
> +}
> +
> +static int max77686_rtc_resume(struct device *dev)
> +{
> + if (device_may_wakeup(dev)) {
> + struct max77686_rtc_info *info = dev_get_drvdata(dev);
> +
> + return disable_irq_wake(info->virq);
> + }
> +
> + return 0;
> +}
> +#endif
Haven't you noticed un-acked interrupts after first resume? Does the
alarm IRQ works after first suspend-resume?
This happens quite often (at least on boards with max14577, max77836 and
s2m/s5m). The drivers implementing own irq_chip often just call irq
worker thread (see max77693_irq_resume [1]). With regmap_irq_chip you
can disable/enable the IRQ [2][3].
P.S. Sorry for late reply. I was on holidays.
[1] http://lxr.free-electrons.com/source/drivers/mfd/max77693-irq.c#L233
[2] http://lxr.free-electrons.com/source/drivers/mfd/max14577.c#L181
[2] http://lxr.free-electrons.com/source/drivers/mfd/sec-core.c#L444
Best regards,
Krzysztof
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