Commit 0e9b12ee authored by Akashdeep Kaur's avatar Akashdeep Kaur Committed by Alexandre Belloni
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rtc: ti-k3: Add support to resume from IO DDR low power mode 



Restore the RTC HW context which may be lost when system enters
certain low power mode (IO+DDR mode).
Check if the RTC registers are locked which would indicate loss of
context (reset) and restore the context as needed.

Signed-off-by: default avatarAkashdeep Kaur <a-kaur@ti.com>
Reviewed-by: default avatarVignesh Raghavendra <vigneshr@ti.com>
Link: https://patch.msgid.link/20260313111740.1492519-1-a-kaur@ti.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent e9f850ba

drivers/rtc/rtc-ti-k3.c

+9 −1
Original line number Diff line number Diff line
@@ -640,10 +640,18 @@ static int __maybe_unused ti_k3_rtc_suspend(struct device *dev) 
static int __maybe_unused ti_k3_rtc_resume(struct device *dev)

{

	struct ti_k3_rtc *priv = dev_get_drvdata(dev);

	int ret = 0;



	if (k3rtc_check_unlocked(priv)) {

		/* RTC locked implies low power mode exit where RTC loses context */

		ret = k3rtc_configure(dev);

		if (ret)

			return ret;

	}



	if (device_may_wakeup(dev))

		disable_irq_wake(priv->irq);

	return 0;

	return ret;

}



static SIMPLE_DEV_PM_OPS(ti_k3_rtc_pm_ops, ti_k3_rtc_suspend, ti_k3_rtc_resume);