Commit f8176e0b authored by Ahmad Fatoum's avatar Ahmad Fatoum Committed by Alexandre Belloni
Browse files

rtc: rv8803: initialize registers on post-probe voltage loss 



The driver probe currently initializes some registers to non-POR
values. These values are not reinstated if the RTC experiences voltage
loss later on. Fix this.

Signed-off-by: default avatarAhmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220426071056.1187235-3-s.hauer@pengutronix.de
parent 8c798e1e

drivers/rtc/rtc-rv8803.c

+13 −0
Original line number Diff line number Diff line
@@ -137,6 +137,13 @@ static int rv8803_write_regs(const struct i2c_client *client, 
	return ret;

}



static int rv8803_regs_configure(struct rv8803_data *rv8803);



static int rv8803_regs_reset(struct rv8803_data *rv8803)

{

	return rv8803_regs_configure(rv8803);

}



static irqreturn_t rv8803_handle_irq(int irq, void *dev_id)

{

	struct i2c_client *client = dev_id;
@@ -270,6 +277,12 @@ static int rv8803_set_time(struct device *dev, struct rtc_time *tm) 
		return flags;

	}



	if (flags & RV8803_FLAG_V2F) {

		ret = rv8803_regs_reset(rv8803);

		if (ret)

			return ret;

	}



	ret = rv8803_write_reg(rv8803->client, RV8803_FLAG,

			       flags & ~(RV8803_FLAG_V1F | RV8803_FLAG_V2F));