diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-pcf2127.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c index 68160d857ac1..9cfc869b4f21 100644 --- a/drivers/rtc/rtc-pcf2127.c +++ b/drivers/rtc/rtc-pcf2127.c @@ -26,6 +26,7 @@ /* Control register 1 */ #define PCF2127_REG_CTRL1 0x00 +#define PCF2127_BIT_CTRL1_POR_OVRD BIT(3) #define PCF2127_BIT_CTRL1_TSF1 BIT(4) /* Control register 2 */ #define PCF2127_REG_CTRL2 0x01 @@ -608,6 +609,13 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap, } /* + * The "Power-On Reset Override" facility prevents the RTC to do a reset + * after power on. For normal operation the PORO must be disabled. + */ + regmap_clear_bits(pcf2127->regmap, PCF2127_REG_CTRL1, + PCF2127_BIT_CTRL1_POR_OVRD); + + /* * Watchdog timer enabled and reset pin /RST activated when timed out. * Select 1Hz clock source for watchdog timer. * Note: Countdown timer disabled and not available. |