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rtc: pcf2127: add error checking when disabling POR0
If PCF2127 device is absent from the I2C bus, or if there is a communication problem, disabling POR0 may fail silently and we still continue with probing the device. In that case, abort probe operation. Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com> Link: https://lore.kernel.org/r/20230728171211.3016019-1-hugo@hugovil.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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1 changed files with 3 additions and 1 deletions
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@ -1192,8 +1192,10 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap,
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* The "Power-On Reset Override" facility prevents the RTC to do a reset
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* after power on. For normal operation the PORO must be disabled.
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*/
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regmap_clear_bits(pcf2127->regmap, PCF2127_REG_CTRL1,
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ret = regmap_clear_bits(pcf2127->regmap, PCF2127_REG_CTRL1,
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PCF2127_BIT_CTRL1_POR_OVRD);
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if (ret < 0)
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return ret;
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ret = regmap_read(pcf2127->regmap, pcf2127->cfg->reg_clkout, &val);
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if (ret < 0)
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