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path: root/kernel/drivers/rtc/rtc-sunxi.c
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Diffstat (limited to 'kernel/drivers/rtc/rtc-sunxi.c')
-rw-r--r--kernel/drivers/rtc/rtc-sunxi.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/kernel/drivers/rtc/rtc-sunxi.c b/kernel/drivers/rtc/rtc-sunxi.c
index 6e678fa4d..52543ae37 100644
--- a/kernel/drivers/rtc/rtc-sunxi.c
+++ b/kernel/drivers/rtc/rtc-sunxi.c
@@ -269,14 +269,13 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
struct sunxi_rtc_dev *chip = dev_get_drvdata(dev);
struct rtc_time *alrm_tm = &wkalrm->time;
struct rtc_time tm_now;
- u32 alrm = 0;
- unsigned long time_now = 0;
- unsigned long time_set = 0;
- unsigned long time_gap = 0;
- unsigned long time_gap_day = 0;
- unsigned long time_gap_hour = 0;
- unsigned long time_gap_min = 0;
- int ret = 0;
+ u32 alrm;
+ time64_t diff;
+ unsigned long time_gap;
+ unsigned long time_gap_day;
+ unsigned long time_gap_hour;
+ unsigned long time_gap_min;
+ int ret;
ret = sunxi_rtc_gettime(dev, &tm_now);
if (ret < 0) {
@@ -284,14 +283,18 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
return -EINVAL;
}
- rtc_tm_to_time(alrm_tm, &time_set);
- rtc_tm_to_time(&tm_now, &time_now);
- if (time_set <= time_now) {
+ diff = rtc_tm_sub(alrm_tm, &tm_now);
+ if (diff <= 0) {
dev_err(dev, "Date to set in the past\n");
return -EINVAL;
}
- time_gap = time_set - time_now;
+ if (diff > 255 * SEC_IN_DAY) {
+ dev_err(dev, "Day must be in the range 0 - 255\n");
+ return -EINVAL;
+ }
+
+ time_gap = diff;
time_gap_day = time_gap / SEC_IN_DAY;
time_gap -= time_gap_day * SEC_IN_DAY;
time_gap_hour = time_gap / SEC_IN_HOUR;
@@ -299,11 +302,6 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
time_gap_min = time_gap / SEC_IN_MIN;
time_gap -= time_gap_min * SEC_IN_MIN;
- if (time_gap_day > 255) {
- dev_err(dev, "Day must be in the range 0 - 255\n");
- return -EINVAL;
- }
-
sunxi_rtc_setaie(0, chip);
writel(0, chip->base + SUNXI_ALRM_DHMS);
usleep_range(100, 300);