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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: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220426071056.1187235-3-s.hauer@pengutronix.de
This commit is contained in:
Ahmad Fatoum 2022-04-26 09:10:53 +02:00 committed by Alexandre Belloni
parent 8c798e1ec1
commit f8176e0bb8
1 changed files with 13 additions and 0 deletions
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13
drivers/rtc/rtc-rv8803.c
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@ -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));