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RTC Fix: Clear OS bit in RTC register after low voltage condition #18

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RTC Fix: Clear OS bit in RTC register after low voltage condition #18

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8 changes: 8 additions & 0 deletions drivers/rtc/rtc-pcf85063.c
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Original file line number Diff line number Diff line change
Expand Up @@ -585,7 +585,15 @@ static int pcf85063_probe(struct i2c_client *client)
dev_err(&client->dev, "RTC chip is not present\n");
return err;
}
ret = regmap_read(pcf85063->regmap, PCF85063_REG_SC, &tmp);
if (ret < 0)
return ret;

// cleat the OS Bit if it is set
if ((tmp & (1 << (8 - 1)))) {
tmp = tmp & (~(1 << (8 - 1)));
regmap_write(pcf85063->regmap, PCF85063_REG_SC, tmp);
}
pcf85063->rtc = devm_rtc_allocate_device(&client->dev);
if (IS_ERR(pcf85063->rtc))
return PTR_ERR(pcf85063->rtc);
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