diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2023-06-15 12:58:23 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2023-08-16 01:27:01 +0200 |
| commit | eccebd813874b748ac4e79a9fe4c7290117ad3be (patch) | |
| tree | 4681880861e2005aada4c68f7848dcac32357db4 /drivers/rtc/rtc-isl12022.c | |
| parent | 2caeb566baabb65add7d99ca6d8bfd566fe91582 (diff) | |
rtc: isl12022: implement RTC_VL_READ ioctl
Hook up support for reading the values of the SR_LBAT85 and SR_LBAT75
bits. Translate the former to "battery low", and the latter to
"battery empty or not-present".
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/r/20230615105826.411953-6-linux@rasmusvillemoes.dk
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc/rtc-isl12022.c')
| -rw-r--r-- | drivers/rtc/rtc-isl12022.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c index a50eed4e4028..0ed28b57bcd8 100644 --- a/drivers/rtc/rtc-isl12022.c +++ b/drivers/rtc/rtc-isl12022.c @@ -204,7 +204,34 @@ static int isl12022_rtc_set_time(struct device *dev, struct rtc_time *tm) return regmap_bulk_write(regmap, ISL12022_REG_SC, buf, sizeof(buf)); } +static int isl12022_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct regmap *regmap = dev_get_drvdata(dev); + u32 user, val; + int ret; + + switch (cmd) { + case RTC_VL_READ: + ret = regmap_read(regmap, ISL12022_REG_SR, &val); + if (ret) + return ret; + + user = 0; + if (val & ISL12022_SR_LBAT85) + user |= RTC_VL_BACKUP_LOW; + + if (val & ISL12022_SR_LBAT75) + user |= RTC_VL_BACKUP_EMPTY; + + return put_user(user, (u32 __user *)arg); + + default: + return -ENOIOCTLCMD; + } +} + static const struct rtc_class_ops isl12022_rtc_ops = { + .ioctl = isl12022_rtc_ioctl, .read_time = isl12022_rtc_read_time, .set_time = isl12022_rtc_set_time, }; |