rtc: pcf85063: add RTC_VL_READ/RTC_VL_CLR support
Allow reading the oscillator status bit. Also allow clearing it even if that makes little sense and can't be done in a race free way. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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@ -277,11 +277,45 @@ static int pcf85063_set_offset(struct device *dev, long offset)
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return regmap_write(pcf85063->regmap, PCF85063_REG_OFFSET, reg);
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}
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static int pcf85063_ioctl(struct device *dev, unsigned int cmd,
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unsigned long arg)
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{
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struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
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int status, ret = 0;
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switch (cmd) {
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case RTC_VL_READ:
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ret = regmap_read(pcf85063->regmap, PCF85063_REG_SC, &status);
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if (ret < 0)
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return ret;
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if (status & PCF85063_REG_SC_OS)
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dev_warn(&pcf85063->rtc->dev, "Voltage low, data loss detected.\n");
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status &= PCF85063_REG_SC_OS;
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if (copy_to_user((void __user *)arg, &status, sizeof(int)))
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return -EFAULT;
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return 0;
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case RTC_VL_CLR:
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ret = regmap_update_bits(pcf85063->regmap, PCF85063_REG_SC,
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PCF85063_REG_SC_OS, 0);
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return ret;
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default:
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return -ENOIOCTLCMD;
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}
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}
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static const struct rtc_class_ops pcf85063_rtc_ops = {
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.read_time = pcf85063_rtc_read_time,
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.set_time = pcf85063_rtc_set_time,
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.read_offset = pcf85063_read_offset,
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.set_offset = pcf85063_set_offset,
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.ioctl = pcf85063_ioctl,
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};
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static const struct rtc_class_ops pcf85063_rtc_ops_alarm = {
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@ -292,6 +326,7 @@ static const struct rtc_class_ops pcf85063_rtc_ops_alarm = {
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.read_alarm = pcf85063_rtc_read_alarm,
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.set_alarm = pcf85063_rtc_set_alarm,
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.alarm_irq_enable = pcf85063_rtc_alarm_irq_enable,
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.ioctl = pcf85063_ioctl,
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};
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static int pcf85063_nvmem_read(void *priv, unsigned int offset,
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