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rtc: mv: add suspend/resume support for wakeup

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Add PM suspend/resume callbacks to enable/disable IRQ wake for the
RTC alarm interrupt. This allows the RTC alarm to wake the system
from STR (e.g. via rtcwake -m mem -s N).

Without this, the RTC IRQ is masked during suspend by the MPIC's
IRQCHIP_MASK_ON_SUSPEND behavior, preventing alarm-based wakeup.

Signed-off-by: Xue Lei <Xue.Lei@windriver.com>
Link: https://patch.msgid.link/20260611023350.1370881-1-Xue.Lei@windriver.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Xue Lei 2026-06-11 10:33:50 +08:00 committed by Alexandre Belloni
parent 3319cfeeb8
commit 851d961ff2
1 changed files with 23 additions and 0 deletions
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23
drivers/rtc/rtc-mv.c
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@ -301,6 +301,28 @@ static const struct of_device_id rtc_mv_of_match_table[] = {
MODULE_DEVICE_TABLE(of, rtc_mv_of_match_table);
#endif
#ifdef CONFIG_PM_SLEEP
static int mv_rtc_suspend(struct device *dev)
{
struct rtc_plat_data *pdata = dev_get_drvdata(dev);
if (device_may_wakeup(dev) && pdata->irq >= 0)
enable_irq_wake(pdata->irq);
return 0;
}
static int mv_rtc_resume(struct device *dev)
{
struct rtc_plat_data *pdata = dev_get_drvdata(dev);
if (device_may_wakeup(dev) && pdata->irq >= 0)
disable_irq_wake(pdata->irq);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(mv_rtc_pm_ops, mv_rtc_suspend, mv_rtc_resume);
/*
* mv_rtc_remove() lives in .exit.text. For drivers registered via
* module_platform_driver_probe() this is ok because they cannot get unbound at
@ -312,6 +334,7 @@ static struct platform_driver mv_rtc_driver __refdata = {
.driver = {
.name = "rtc-mv",
.of_match_table = of_match_ptr(rtc_mv_of_match_table),
.pm = &mv_rtc_pm_ops,
},
};