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| author |  Alexandre Belloni <alexandre.belloni@bootlin.com>
| 2024-04-17 21:19:36 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com>
| 2024-05-07 23:40:10 +0200 |
| commit | eca1b3c2e7ff2364628fc6b1a136d341b8670823 (patch) | |
| tree | 486c216cb47f11b339e4d2658ec922fa5a0b808b /drivers/rtc | |
| parent | rtc: rx8111: demote warnings to debug level (diff) | |
| download | linux-eca1b3c2e7ff2364628fc6b1a136d341b8670823.tar.gz linux-eca1b3c2e7ff2364628fc6b1a136d341b8670823.tar.bz2 linux-eca1b3c2e7ff2364628fc6b1a136d341b8670823.zip | |
rtc: rx8111: handle VLOW flag
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>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-rx8111.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-rx8111.c b/drivers/rtc/rtc-rx8111.c index 4a35bd921b33..8450d9f0b566 100644 --- a/drivers/rtc/rtc-rx8111.c +++ b/drivers/rtc/rtc-rx8111.c @@ -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], + ®val); + if (ret) + return ret; + + vlval |= regval ? RTC_VL_BACKUP_LOW : 0; + return put_user(vlval, (typeof(vlval) __user *)arg); default: return -ENOIOCTLCMD; |