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rtc: sysfs: Use time64_t variables to set time/alarm 

Use time64_t variables and related APIs for sysfs interfaces to
support setting time or alarm after the year 2038 on 32-bit system.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Baolin Wang 2017-11-09 15:09:20 +08:00 committed by Alexandre Belloni
parent 573e2bf054
commit 9a06da2ecc
1 changed files with 13 additions and 12 deletions
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25
drivers/rtc/rtc-sysfs.c
View File

@ -72,9 +72,10 @@ since_epoch_show(struct device *dev, struct device_attribute *attr, char *buf)
retval = rtc_read_time(to_rtc_device(dev), &tm);
if (retval == 0) {
unsigned long time;
rtc_tm_to_time(&tm, &time);
retval = sprintf(buf, "%lu\n", time);
time64_t time;
time = rtc_tm_to_time64(&tm);
retval = sprintf(buf, "%lld\n", time);
}
return retval;
@ -132,7 +133,7 @@ static ssize_t
wakealarm_show(struct device *dev, struct device_attribute *attr, char *buf)
{
ssize_t retval;
unsigned long alarm;
time64_t alarm;
struct rtc_wkalrm alm;
/* Don't show disabled alarms. For uniformity, RTC alarms are
@ -145,8 +146,8 @@ wakealarm_show(struct device *dev, struct device_attribute *attr, char *buf)
*/
retval = rtc_read_alarm(to_rtc_device(dev), &alm);
if (retval == 0 && alm.enabled) {
rtc_tm_to_time(&alm.time, &alarm);
retval = sprintf(buf, "%lu\n", alarm);
alarm = rtc_tm_to_time64(&alm.time);
retval = sprintf(buf, "%lld\n", alarm);
}
return retval;
@ -157,8 +158,8 @@ wakealarm_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t n)
{
ssize_t retval;
unsigned long now, alarm;
unsigned long push = 0;
time64_t now, alarm;
time64_t push = 0;
struct rtc_wkalrm alm;
struct rtc_device *rtc = to_rtc_device(dev);
const char *buf_ptr;
@ -170,7 +171,7 @@ wakealarm_store(struct device *dev, struct device_attribute *attr,
retval = rtc_read_time(rtc, &alm.time);
if (retval < 0)
return retval;
rtc_tm_to_time(&alm.time, &now);
now = rtc_tm_to_time64(&alm.time);
buf_ptr = buf;
if (*buf_ptr == '+') {
@ -181,7 +182,7 @@ wakealarm_store(struct device *dev, struct device_attribute *attr,
} else
adjust = 1;
}
retval = kstrtoul(buf_ptr, 0, &alarm);
retval = kstrtos64(buf_ptr, 0, &alarm);
if (retval)
return retval;
if (adjust) {
@ -197,7 +198,7 @@ wakealarm_store(struct device *dev, struct device_attribute *attr,
return retval;
if (alm.enabled) {
if (push) {
rtc_tm_to_time(&alm.time, &push);
push = rtc_tm_to_time64(&alm.time);
alarm += push;
} else
return -EBUSY;
@ -212,7 +213,7 @@ wakealarm_store(struct device *dev, struct device_attribute *attr,
*/
alarm = now + 300;
}
rtc_time_to_tm(alarm, &alm.time);
rtc_time64_to_tm(alarm, &alm.time);
retval = rtc_set_alarm(rtc, &alm);
return (retval < 0) ? retval : n;