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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>
hifive-unleashed-5.1
Fabien Lahoudere 2017-07-05 10:02:30 +02:00 committed by Alexandre Belloni
parent 16486d0c1c
commit 7a1fe407fc
1 changed files with 31 additions and 1 deletions
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32
drivers/rtc/rtc-s35390a.c
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@ -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;