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Blackfin: only initialize the RTC when actually used

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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2008-10-06 03:39:07 -04:00
parent 621e579b81
commit 3c87989834
2 changed files with 10 additions and 13 deletions
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19
drivers/rtc/bfin_rtc.c
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@ -26,10 +26,17 @@
#define NUM_SECS_IN_HR HRS_TO_SECS(1) #define NUM_SECS_IN_HR HRS_TO_SECS(1)
#define NUM_SECS_IN_DAY DAYS_TO_SECS(1) #define NUM_SECS_IN_DAY DAYS_TO_SECS(1)
/* Enable the RTC prescaler enable register */
static void rtc_init(void)
{
if (!(bfin_read_RTC_PREN() & 0x1))
bfin_write_RTC_PREN(0x1);
}
/* Our on-chip RTC has no notion of "reset" */ /* Our on-chip RTC has no notion of "reset" */
void rtc_reset(void) void rtc_reset(void)
{ {
return; rtc_init();
} }
/* Wait for pending writes to complete */ /* Wait for pending writes to complete */
@ -42,14 +49,6 @@ static void wait_for_complete(void)
bfin_write_RTC_ISTAT(WRITE_COMPLETE); bfin_write_RTC_ISTAT(WRITE_COMPLETE);
} }
/* Enable the RTC prescaler enable register */
int rtc_init(void)
{
pr_stamp();
bfin_write_RTC_PREN(0x1);
return 0;
}
/* Set the time. Get the time_in_secs which is the number of seconds since Jan 1970 and set the RTC registers /* Set the time. Get the time_in_secs which is the number of seconds since Jan 1970 and set the RTC registers
* based on this value. * based on this value.
*/ */
@ -64,6 +63,7 @@ int rtc_set(struct rtc_time *tmp)
return -1; return -1;
} }
rtc_init();
wait_for_complete(); wait_for_complete();
/* Calculate number of seconds this incoming time represents */ /* Calculate number of seconds this incoming time represents */
@ -100,6 +100,7 @@ int rtc_get(struct rtc_time *tmp)
return -1; return -1;
} }
rtc_init();
wait_for_complete(); wait_for_complete();
/* Read the RTC_STAT register */ /* Read the RTC_STAT register */

4
lib_blackfin/board.c
View file

@ -250,7 +250,6 @@ void init_cplbtables(void)
extern int exception_init(void); extern int exception_init(void);
extern int irq_init(void); extern int irq_init(void);
extern int rtc_init(void);
extern int timer_init(void); extern int timer_init(void);
void board_init_f(ulong bootflag) void board_init_f(ulong bootflag)
@ -313,9 +312,6 @@ void board_init_f(ulong bootflag)
display_banner(); display_banner();
checkboard(); checkboard();
#if defined(CONFIG_RTC_BFIN) && defined(CONFIG_CMD_DATE)
rtc_init();
#endif
timer_init(); timer_init();
printf("Clock: VCO: %lu MHz, Core: %lu MHz, System: %lu MHz\n", printf("Clock: VCO: %lu MHz, Core: %lu MHz, System: %lu MHz\n",