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rtc: rx8111: handle VLOW flag

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Allow userspace to get battery status information and be able to warn when
battery is low and has to be replaced.

Tested-by: Waqar Hameed <waqar.hameed@axis.com>
Reviewed-by: Waqar Hameed <waqar.hameed@axis.com>
Link: https://lore.kernel.org/r/20240417191937.33790-2-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2024-04-17 21:19:36 +02:00
parent b7ff9efebc
commit eca1b3c2e7
1 changed files with 12 additions and 0 deletions
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12
drivers/rtc/rtc-rx8111.c
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@ -95,6 +95,9 @@ enum rx8111_regfield {
RX8111_REGF_INIEN,
RX8111_REGF_CHGEN,
/* RX8111_REG_STATUS_MON. */
RX8111_REGF_VLOW,
/* Sentinel value. */
RX8111_REGF_MAX
};
@ -129,6 +132,8 @@ static const struct reg_field rx8111_regfields[] = {
[RX8111_REGF_SWSEL1] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 3, 3),
[RX8111_REGF_INIEN] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 6, 6),
[RX8111_REGF_CHGEN] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 7, 7),
[RX8111_REGF_VLOW] = REG_FIELD(RX8111_REG_STATUS_MON, 1, 1),
};
static const struct regmap_config rx8111_regmap_config = {
@ -276,6 +281,13 @@ static int rx8111_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
vlval = regval ? RTC_VL_DATA_INVALID : 0;
ret = regmap_field_read(data->regfields[RX8111_REGF_VLOW],
&regval);
if (ret)
return ret;
vlval |= regval ? RTC_VL_BACKUP_LOW : 0;
return put_user(vlval, (typeof(vlval) __user *)arg);
default:
return -ENOIOCTLCMD;