[PATCH v9 1/5] rtc: max77686: Allow the max77686 rtc to wakeup the system
From: Javier Martinez Canillas <hidden>
Date: 2014-08-18 08:34:56
Also in:
linux-samsung-soc, lkml
Subsystem:
maxim pmic and muic drivers for exynos based boards, real time clock (rtc) subsystem, the rest · Maintainers:
Chanwoo Choi, Krzysztof Kozlowski, Alexandre Belloni, Linus Torvalds
From: Doug Anderson <dianders@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. 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@chromium.org> Reviewed-by: Javier Martinez Canillas <redacted> Reviewed-by: Krzysztof Kozlowski <redacted> --- Changes since v6: None Changes since v5: - Fix $SUBJECT since the patch does not actually touch the mfd subsys. Suggested by Lee Jones. Changes since v4: None 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(+)
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,
--
2.0.0.rc2