On śro, 2014-06-25 at 21:03 +0200, Javier Martinez Canillas wrote:
> From: Doug Anderson <dianders@xxxxxxxxxxxx>
>
> The max77686 includes an RTC that keeps power during suspend. It's
> convenient to be able to use it as a wakeup source.
>
> NOTE: due to wakeup ordering problems this patch alone doesn't work so
> well on exynos5250-snow. You also need something that brings the i2c
> bus up before the max77686 wakeup runs.
>
> Signed-off-by: Doug Anderson <dianders@xxxxxxxxxxxx>
> Reviewed-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
> ---
>
> Changes since v3:
> - Keep the note that this patch needs another change due wakeup
> ordering problems.
>
> drivers/rtc/rtc-max77686.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Best regards,
Krzysztof
> 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
> +
> +static SIMPLE_DEV_PM_OPS(max77686_rtc_pm_ops,
> + max77686_rtc_suspend, max77686_rtc_resume);
> +
> static const struct platform_device_id rtc_id[] = {
> { "max77686-rtc", 0 },
> {},
> @@ -592,6 +619,7 @@ static struct platform_driver max77686_rtc_driver = {
> .driver = {
> .name = "max77686-rtc",
> .owner = THIS_MODULE,
> + .pm = &max77686_rtc_pm_ops,
> },
> .probe = max77686_rtc_probe,
> .shutdown = max77686_rtc_shutdown,
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