diff options
Diffstat (limited to 'drivers/rtc/rtc-rv3029c2.c')
| -rw-r--r-- | drivers/rtc/rtc-rv3029c2.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c index 2985c0f44d53..f4c6d6e3b165 100644 --- a/drivers/rtc/rtc-rv3029c2.c +++ b/drivers/rtc/rtc-rv3029c2.c @@ -459,6 +459,35 @@ static int rv3029_set_time(struct device *dev, struct rtc_time *tm) RV3029_STATUS_PON, 0); } +static int rv3029_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct rv3029_data *rv3029 = dev_get_drvdata(dev); + unsigned long vl = 0; + int sr, ret = 0; + + switch (cmd) { + case RTC_VL_READ: + ret = regmap_read(rv3029->regmap, RV3029_STATUS, &sr); + if (ret < 0) + return ret; + + if (sr & RV3029_STATUS_VLOW1) + vl = RTC_VL_ACCURACY_LOW; + + if (sr & (RV3029_STATUS_VLOW2 | RV3029_STATUS_PON)) + vl |= RTC_VL_DATA_INVALID; + + return put_user(vl, (unsigned int __user *)arg); + + case RTC_VL_CLR: + return regmap_update_bits(rv3029->regmap, RV3029_STATUS, + RV3029_STATUS_VLOW1, 0); + + default: + return -ENOIOCTLCMD; + } +} + static const struct rv3029_trickle_tab_elem { u32 r; /* resistance in ohms */ u8 conf; /* trickle config bits */ @@ -672,6 +701,7 @@ static void rv3029_hwmon_register(struct device *dev, const char *name) static struct rtc_class_ops rv3029_rtc_ops = { .read_time = rv3029_read_time, .set_time = rv3029_set_time, + .ioctl = rv3029_ioctl, }; static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq, |