diff options
Diffstat (limited to 'drivers/rtc/rtc-ds1307.c')
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 162330b9d1dc..1efa70d20968 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -16,7 +16,7 @@ #include <linux/string.h> #include <linux/rtc.h> #include <linux/bcd.h> - +#include <linux/platform_device.h> /* We can't determine type by probing, but if we expect pre-Linux code @@ -748,6 +748,17 @@ read_rtc: bin2bcd(tmp)); } + /* + * Assume that with an IRQ-line, we can wakeup the system by using it. + * But for this purpose it's required to enable the wakeup-support before + * registering the RTC (otherwise it will fail) + * (Luis Galdos) + */ + if (want_irq) { + device_init_wakeup(&client->dev, 1); + device_set_wakeup_enable(&client->dev, 0); + } + ds1307->rtc = rtc_device_register(client->name, &client->dev, &ds13xx_rtc_ops, THIS_MODULE); if (IS_ERR(ds1307->rtc)) { @@ -811,6 +822,37 @@ static int __devexit ds1307_remove(struct i2c_client *client) return 0; } +#if defined(CONFIG_PM) +static int ds1307_suspend(struct i2c_client *client, pm_message_t state) +{ + if (device_may_wakeup(&client->dev)) { + enable_irq_wake(client->irq); + } + + return 0; +} + +static int ds1307_resume(struct i2c_client *client) +{ + if (device_may_wakeup(&client->dev)) { + struct ds1307 *ds1307; + + ds1307 = i2c_get_clientdata(client); + + disable_irq_wake(client->irq); + + /* Disable the IRQ, then the work function will enable it */ + disable_irq_nosync(client->irq); + schedule_work(&ds1307->work); + } + + return 0; +} +#else +#define ds1307_suspend NULL +#define ds1307_resume NULL +#endif /* defined(CONFIG_PM) */ + static struct i2c_driver ds1307_driver = { .driver = { .name = "rtc-ds1307", @@ -818,6 +860,8 @@ static struct i2c_driver ds1307_driver = { }, .probe = ds1307_probe, .remove = __devexit_p(ds1307_remove), + .resume = ds1307_resume, + .suspend = ds1307_suspend, .id_table = ds1307_id, }; |