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[PATCH] ARM: RTC: allow driver methods to return error

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Allow RTC drivers to return error codes from their read_time
or read_alarm methods.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-04-30 12:19:28 +01:00
parent a6ad57fb4b
commit d5aa207e46
4 changed files with 35 additions and 23 deletions
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29
arch/arm/common/rtctime.c
View file

@ -141,10 +141,10 @@ void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, struct rtc
next->tm_sec = alrm->tm_sec;
}
static inline void rtc_read_time(struct rtc_ops *ops, struct rtc_time *tm)
static inline int rtc_read_time(struct rtc_ops *ops, struct rtc_time *tm)
{
memset(tm, 0, sizeof(struct rtc_time));
ops->read_time(tm);
return ops->read_time(tm);
}
static inline int rtc_set_time(struct rtc_ops *ops, struct rtc_time *tm)
@ -163,8 +163,7 @@ static inline int rtc_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
int ret = -EINVAL;
if (ops->read_alarm) {
memset(alrm, 0, sizeof(struct rtc_wkalrm));
ops->read_alarm(alrm);
ret = 0;
ret = ops->read_alarm(alrm);
}
return ret;
}
@ -283,7 +282,9 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
break;
case RTC_RD_TIME:
rtc_read_time(ops, &tm);
ret = rtc_read_time(ops, &tm);
if (ret)
break;
ret = copy_to_user(uarg, &tm, sizeof(tm));
if (ret)
ret = -EFAULT;
@ -424,15 +425,15 @@ static int rtc_read_proc(char *page, char **start, off_t off, int count, int *eo
struct rtc_time tm;
char *p = page;
rtc_read_time(ops, &tm);
p += sprintf(p,
"rtc_time\t: %02d:%02d:%02d\n"
"rtc_date\t: %04d-%02d-%02d\n"
"rtc_epoch\t: %04lu\n",
tm.tm_hour, tm.tm_min, tm.tm_sec,
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
rtc_epoch);
if (rtc_read_time(ops, &tm) == 0) {
p += sprintf(p,
"rtc_time\t: %02d:%02d:%02d\n"
"rtc_date\t: %04d-%02d-%02d\n"
"rtc_epoch\t: %04lu\n",
tm.tm_hour, tm.tm_min, tm.tm_sec,
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
rtc_epoch);
}
if (rtc_read_alarm(ops, &alrm) == 0) {
p += sprintf(p, "alrm_time\t: ");

17
arch/arm/mach-integrator/time.c
View file

@ -40,25 +40,32 @@ static int integrator_set_rtc(void)
return 1;
}
static void rtc_read_alarm(struct rtc_wkalrm *alrm)
static int rtc_read_alarm(struct rtc_wkalrm *alrm)
{
rtc_time_to_tm(readl(rtc_base + RTC_MR), &alrm->time);
return 0;
}
static int rtc_set_alarm(struct rtc_wkalrm *alrm)
static inline int rtc_set_alarm(struct rtc_wkalrm *alrm)
{
unsigned long time;
int ret;
ret = rtc_tm_to_time(&alrm->time, &time);
/*
* At the moment, we can only deal with non-wildcarded alarm times.
*/
ret = rtc_valid_tm(&alrm->time);
if (ret == 0)
ret = rtc_tm_to_time(&alrm->time, &time);
if (ret == 0)
writel(time, rtc_base + RTC_MR);
return ret;
}
static void rtc_read_time(struct rtc_time *tm)
static int rtc_read_time(struct rtc_time *tm)
{
rtc_time_to_tm(readl(rtc_base + RTC_DR), tm);
return 0;
}
/*
@ -69,7 +76,7 @@ static void rtc_read_time(struct rtc_time *tm)
* edge of the 1Hz clock, we must write the time one second
* in advance.
*/
static int rtc_set_time(struct rtc_time *tm)
static inline int rtc_set_time(struct rtc_time *tm)
{
unsigned long time;
int ret;

8
drivers/char/s3c2410-rtc.c
View file

@ -116,7 +116,7 @@ static void s3c2410_rtc_setfreq(int freq)
/* Time read/write */
static void s3c2410_rtc_gettime(struct rtc_time *rtc_tm)
static int s3c2410_rtc_gettime(struct rtc_time *rtc_tm)
{
unsigned int have_retried = 0;
@ -151,6 +151,8 @@ static void s3c2410_rtc_gettime(struct rtc_time *rtc_tm)
rtc_tm->tm_year += 100;
rtc_tm->tm_mon -= 1;
return 0;
}
@ -171,7 +173,7 @@ static int s3c2410_rtc_settime(struct rtc_time *tm)
return 0;
}
static void s3c2410_rtc_getalarm(struct rtc_wkalrm *alrm)
static int s3c2410_rtc_getalarm(struct rtc_wkalrm *alrm)
{
struct rtc_time *alm_tm = &alrm->time;
unsigned int alm_en;
@ -231,6 +233,8 @@ static void s3c2410_rtc_getalarm(struct rtc_wkalrm *alrm)
}
/* todo - set alrm->enabled ? */
return 0;
}
static int s3c2410_rtc_setalarm(struct rtc_wkalrm *alrm)

4
include/asm-arm/rtc.h
View file

@ -18,9 +18,9 @@ struct rtc_ops {
void (*release)(void);
int (*ioctl)(unsigned int, unsigned long);
void (*read_time)(struct rtc_time *);
int (*read_time)(struct rtc_time *);
int (*set_time)(struct rtc_time *);
void (*read_alarm)(struct rtc_wkalrm *);
int (*read_alarm)(struct rtc_wkalrm *);
int (*set_alarm)(struct rtc_wkalrm *);
int (*proc)(char *buf);
};