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rtc: m41t80: add suspend handlers for alarm IRQ 

Allow the alarm IRQ of RTC to be used as a wakeup source for the system
suspend.

Signed-off-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Stefan Christ 2016-07-05 13:53:17 +02:00 committed by Alexandre Belloni
parent e89487fef5
commit ae036af896
1 changed files with 25 additions and 0 deletions
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25
drivers/rtc/rtc-m41t80.c
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@ -335,6 +335,30 @@ static struct rtc_class_ops m41t80_rtc_ops = {
.proc = m41t80_rtc_proc, .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, static ssize_t flags_show(struct device *dev,
struct device_attribute *attr, char *buf) struct device_attribute *attr, char *buf)
{ {
@ -870,6 +894,7 @@ static int m41t80_remove(struct i2c_client *client)
static struct i2c_driver m41t80_driver = { static struct i2c_driver m41t80_driver = {
.driver = { .driver = {
.name = "rtc-m41t80", .name = "rtc-m41t80",
.pm = &m41t80_pm,
}, },
.probe = m41t80_probe, .probe = m41t80_probe,
.remove = m41t80_remove, .remove = m41t80_remove,