Add a new parameter allowing the get and set the correction using ioctls
instead of just sysfs.
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
---
drivers/rtc/dev.c | 19 +++++++++++++++++++
include/uapi/linux/rtc.h | 1 +
2 files changed, 20 insertions(+)
diff --git a/drivers/rtc/dev.c b/drivers/rtc/dev.c
index 143c097eff0f..abee1fc4705e 100644
--- a/drivers/rtc/dev.c
+++ b/drivers/rtc/dev.c
@@ -398,6 +398,16 @@ static long rtc_dev_ioctl(struct file *file,
param.uvalue = rtc->features[0];
break;
+ case RTC_PARAM_CORRECTION:
+ mutex_unlock(&rtc->ops_lock);
+ if (param.index != 0)
+ return -EINVAL;
+ err = rtc_read_offset(rtc, &offset);
+ mutex_lock(&rtc->ops_lock);
+ if (err == 0)
+ param.svalue = offset;
+ break;
+
default:
err = -EINVAL;
}
@@ -416,6 +426,15 @@ static long rtc_dev_ioctl(struct file *file,
switch(param.param) {
case RTC_PARAM_FEATURES:
+ err = -EINVAL;
+ break;
+
+ case RTC_PARAM_CORRECTION:
+ mutex_unlock(&rtc->ops_lock);
+ if (param.index != 0)
+ return -EINVAL;
+ return rtc_set_offset(rtc, param.svalue);
+
default:
err = -EINVAL;
}
diff --git a/include/uapi/linux/rtc.h b/include/uapi/linux/rtc.h
index ded2aaab7ec7..04da6c3082b3 100644
--- a/include/uapi/linux/rtc.h
+++ b/include/uapi/linux/rtc.h
@@ -136,6 +136,7 @@ struct rtc_param {
/* parameter list */
#define RTC_PARAM_FEATURES 0
+#define RTC_PARAM_CORRECTION 1
#define RTC_MAX_FREQ 8192
--
2.31.1
