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rtc: pcf8523: return meaningful value for RTC_VL_READ 

REG_CONTROL3_BLF indicates the battery is low and needs to be replaced
soon.

Link: https://lore.kernel.org/r/20191214220259.621996-6-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2019-12-14 23:02:47 +01:00
parent af4273116d
commit 244cf8f0ed
1 changed files with 3 additions and 3 deletions
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6
drivers/rtc/rtc-pcf8523.c
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@ -282,11 +282,11 @@ static int pcf8523_rtc_ioctl(struct device *dev, unsigned int cmd,
ret = pcf8523_voltage_low(client);
if (ret < 0)
return ret;
if (ret)
ret = RTC_VL_BACKUP_LOW;
if (copy_to_user((void __user *)arg, &ret, sizeof(int)))
return -EFAULT;
return put_user(ret, (unsigned int __user *)arg);
return 0;
default:
return -ENOIOCTLCMD;
}