[rtc-linux] [PATCH 2/2] rtc: m41t80: add suspend handlers for alarm IRQ
From: Stefan Christ <hidden>
Date: 2016-07-05 11:53:18
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
Allow the alarm IRQ of RTC to be used as a wakeup source for the system suspend. Signed-off-by: Stefan Christ <redacted> --- drivers/rtc/rtc-m41t80.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 04e8577..4f09089 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c@@ -337,6 +337,30 @@ static struct rtc_class_ops m41t80_rtc_ops = { .proc = m41t80_rtc_proc, }; +#ifdef CONFIG_PM_SLEEP +static int m41t80_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + if (client->irq >= 0 && device_may_wakeup(dev)) + enable_irq_wake(client->irq); + + return 0; +} + +static int m41t80_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + if (client->irq >= 0 && device_may_wakeup(dev)) + disable_irq_wake(client->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(m41t80_pm, m41t80_suspend, m41t80_resume); + static ssize_t flags_show(struct device *dev, struct device_attribute *attr, char *buf) {
@@ -873,6 +897,7 @@ static int m41t80_remove(struct i2c_client *client) static struct i2c_driver m41t80_driver = { .driver = { .name = "rtc-m41t80", + .pm = &m41t80_pm, }, .probe = m41t80_probe, .remove = m41t80_remove,
--
1.9.1
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