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rtc: m41t80: fix SQWE override when setting an alarm 

Currently setting an alarm clears the SQWE bit which means that the
clock output is disabled no matter its previous state.

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Gary Bisson 2017-04-25 16:45:14 +02:00 committed by Alexandre Belloni
parent 8066360744
commit 2de9261c18
1 changed files with 3 additions and 0 deletions
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3
drivers/rtc/rtc-m41t80.c
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@ -332,6 +332,9 @@ static int m41t80_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
return err; return err;
} }
/* Keep SQWE bit value */
alarmvals[0] |= (ret & M41T80_ALMON_SQWE);
ret = i2c_smbus_read_byte_data(client, M41T80_REG_FLAGS); ret = i2c_smbus_read_byte_data(client, M41T80_REG_FLAGS);
if (ret < 0) if (ret < 0)
return ret; return ret;