diff options
| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2008-03-26 13:02:13 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2008-03-26 15:17:42 +0100 |
| commit | da8808df7a9cef5a3d2ee286ef9ebf9de1780660 (patch) | |
| tree | ae0425036c6294d2157e502e610a788f3d117879 /drivers | |
| parent | 438a4c11260b4ea9805039b0b4f92f9df5306b02 (diff) | |
Add CFG_RTC_DS1337_NOOSC to turn off OSC output
The default settings for RTC DS1337 keeps the OSC
output, 32,768 Hz, on. This add CFG_RTC_DS1337_NOOSC to
turn it off.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/rtc/ds1337.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/rtc/ds1337.c b/drivers/rtc/ds1337.c index 50ab44690cc..69ab2bf9db4 100644 --- a/drivers/rtc/ds1337.c +++ b/drivers/rtc/ds1337.c @@ -158,11 +158,18 @@ void rtc_set (struct rtc_time *tmp) * SQW/INTB* pin and program it for 32,768 Hz output. Note that * according to the datasheet, turning on the square wave output * increases the current drain on the backup battery from about - * 600 nA to 2uA. + * 600 nA to 2uA. Define CFG_RTC_DS1337_NOOSC if you wish to turn + * off the OSC output. */ +#ifdef CFG_RTC_DS1337_NOOSC + #define RTC_DS1337_RESET_VAL \ + (RTC_CTL_BIT_INTCN | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2) +#else + #define RTC_DS1337_RESET_VAL (RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2) +#endif void rtc_reset (void) { - rtc_write (RTC_CTL_REG_ADDR, RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2); + rtc_write (RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL); } |