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rtc: pcf85063: keep the divider chain in reset during set_time

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Sync from upstream linux v6.19.

Reviewed-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Signed-off-by: Alexander Feilke <alexander.feilke@ew.tq-group.com>
This commit is contained in:
Alexander Feilke
2026-06-05 10:14:24 -06:00
committed by Tom Rini
parent 49754d293e
commit 2b6de25797
1 changed files with 24 additions and 1 deletions
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drivers/rtc/pcf85063.c
+24 -1
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@@ -68,12 +68,25 @@ static int pcf85063_get_time(struct udevice *dev, struct rtc_time *tm)
static int pcf85063_set_time(struct udevice *dev, const struct rtc_time *tm)
{
u8 regs[7];
int rc;
if (tm->tm_year < 2000 || tm->tm_year > 2099) {
dev_err(dev, "Year must be between 2000 and 2099.\n");
return -EINVAL;
}
/*
* to accurately set the time, reset the divider chain and keep it in
* reset state until all time/date registers are written
*/
rc = dm_i2c_reg_clrset(dev, PCF85063_REG_CTRL1,
PCF85063_REG_CTRL1_EXT_TEST |
PCF85063_REG_CTRL1_STOP,
PCF85063_REG_CTRL1_STOP);
if (rc)
return rc;
/* hours, minutes and seconds */
regs[0] = bin2bcd(tm->tm_sec) & (~PCF85063_REG_SC_OS);
@@ -91,7 +104,17 @@ static int pcf85063_set_time(struct udevice *dev, const struct rtc_time *tm)
/* adjust register to match rtc_time spec */
regs[6] = bin2bcd(tm->tm_year % 100);
return dm_i2c_write(dev, PCF85063_REG_SC, regs, sizeof(regs));
rc = dm_i2c_write(dev, PCF85063_REG_SC, regs, sizeof(regs));
if (rc)
return rc;
/*
* Write the control register as a separate action since the size of
* the register space is different between the PCF85063TP and
* PCF85063A devices. The rollover point can not be used.
*/
return dm_i2c_reg_clrset(dev, PCF85063_REG_CTRL1,
PCF85063_REG_CTRL1_STOP, 0);
}
static int pcf85063_reset(struct udevice *dev)