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| author | Fabien Lahoudere <fabien.lahoudere@collabora.co.uk> | 2017-07-05 10:02:30 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-07-31 00:17:44 +0200 |
| commit | 7a1fe407fc2a4bbe32a8473c92e2988bc9d25fc3 (patch) | |
| tree | 38141c826d827dd7204d8af99caa67b69e89f61d /drivers/rtc | |
| parent | 16486d0c1c659d4ab502c5bea408654287edcb74 (diff) | |
| download | linux-7a1fe407fc2a4bbe32a8473c92e2988bc9d25fc3.tar.bz2 | |
rtc: s35390a: implement ioctls
Implements RTC_VL_READ and RTC_VL_CLR ioctls.
Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.co.uk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-s35390a.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c index 3aec3b225bc4..7067bca5c20d 100644 --- a/drivers/rtc/rtc-s35390a.c +++ b/drivers/rtc/rtc-s35390a.c @@ -404,12 +404,42 @@ static int s35390a_rtc_set_time(struct device *dev, struct rtc_time *tm) return s35390a_set_datetime(to_i2c_client(dev), tm); } +static int s35390a_rtc_ioctl(struct device *dev, unsigned int cmd, + unsigned long arg) +{ + struct i2c_client *client = to_i2c_client(dev); + struct s35390a *s35390a = i2c_get_clientdata(client); + char sts; + int err; + + switch (cmd) { + case RTC_VL_READ: + /* s35390a_reset set lowvoltage flag and init RTC if needed */ + err = s35390a_read_status(s35390a, &sts); + if (err < 0) + return err; + if (copy_to_user((void __user *)arg, &err, sizeof(int))) + return -EFAULT; + break; + case RTC_VL_CLR: + /* update flag and clear register */ + err = s35390a_init(s35390a); + if (err < 0) + return err; + break; + default: + return -ENOIOCTLCMD; + } + + return 0; +} + static const struct rtc_class_ops s35390a_rtc_ops = { .read_time = s35390a_rtc_read_time, .set_time = s35390a_rtc_set_time, .set_alarm = s35390a_rtc_set_alarm, .read_alarm = s35390a_rtc_read_alarm, - + .ioctl = s35390a_rtc_ioctl, }; static struct i2c_driver s35390a_driver; |