diff options
Diffstat (limited to 'drivers/rtc/rtc-rv8803.c')
| -rw-r--r-- | drivers/rtc/rtc-rv8803.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-rv8803.c b/drivers/rtc/rtc-rv8803.c index 09ab5cb1fa8a..24c688eec527 100644 --- a/drivers/rtc/rtc-rv8803.c +++ b/drivers/rtc/rtc-rv8803.c @@ -223,11 +223,21 @@ static int rv8803_set_time(struct device *dev, struct rtc_time *tm) { struct rv8803_data *rv8803 = dev_get_drvdata(dev); u8 date[7]; - int flags, ret; + int ctrl, flags, ret; if ((tm->tm_year < 100) || (tm->tm_year > 199)) return -EINVAL; + ctrl = rv8803_read_reg(rv8803->client, RV8803_CTRL); + if (ctrl < 0) + return ctrl; + + /* Stop the clock */ + ret = rv8803_write_reg(rv8803->client, RV8803_CTRL, + ctrl | RV8803_CTRL_RESET); + if (ret) + return ret; + date[RV8803_SEC] = bin2bcd(tm->tm_sec); date[RV8803_MIN] = bin2bcd(tm->tm_min); date[RV8803_HOUR] = bin2bcd(tm->tm_hour); @@ -240,6 +250,12 @@ static int rv8803_set_time(struct device *dev, struct rtc_time *tm) if (ret) return ret; + /* Restart the clock */ + ret = rv8803_write_reg(rv8803->client, RV8803_CTRL, + ctrl & ~RV8803_CTRL_RESET); + if (ret) + return ret; + mutex_lock(&rv8803->flags_lock); flags = rv8803_read_reg(rv8803->client, RV8803_FLAG); |