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rtc: sunxi: Replace deprecated rtc_tm_to_time()

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sunxi_rtc_setalarm() uses deprecated rtc_tm_to_time(),
which will overflow in year 2106 on 32-bit machines.

This patch solves this by:
- Replacing rtc_tm_to_time() with rtc_tm_sub()

Also remove the unnecessary initial zeroing of some
local variables in sunxi_rtc_setalarm().

Cc: Carlo Caione <carlo.caione@gmail.com>
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Xunlei Pang 2015-06-12 10:04:12 +08:00 committed by Alexandre Belloni
parent f118db1efd
commit 9033fd8ba7
1 changed files with 15 additions and 17 deletions
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32
drivers/rtc/rtc-sunxi.c
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@ -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);