diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/rtc/rtc-pcf2127.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c index 9cfc869b4f21..33c04e1daa95 100644 --- a/drivers/rtc/rtc-pcf2127.c +++ b/drivers/rtc/rtc-pcf2127.c @@ -58,6 +58,9 @@ #define PCF2127_REG_ALARM_DM 0x0D #define PCF2127_REG_ALARM_DW 0x0E #define PCF2127_BIT_ALARM_AE BIT(7) +/* CLKOUT control register */ +#define PCF2127_REG_CLKOUT 0x0f +#define PCF2127_BIT_CLKOUT_OTPR BIT(5) /* Watchdog registers */ #define PCF2127_REG_WD_CTL 0x10 #define PCF2127_BIT_WD_CTL_TF0 BIT(0) @@ -559,6 +562,7 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap, { struct pcf2127 *pcf2127; int ret = 0; + unsigned int val; dev_dbg(dev, "%s\n", __func__); @@ -615,6 +619,19 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap, regmap_clear_bits(pcf2127->regmap, PCF2127_REG_CTRL1, PCF2127_BIT_CTRL1_POR_OVRD); + ret = regmap_read(pcf2127->regmap, PCF2127_REG_CLKOUT, &val); + if (ret < 0) + return ret; + + if (!(val & PCF2127_BIT_CLKOUT_OTPR)) { + ret = regmap_set_bits(pcf2127->regmap, PCF2127_REG_CLKOUT, + PCF2127_BIT_CLKOUT_OTPR); + if (ret < 0) + return ret; + + msleep(100); + } + /* * Watchdog timer enabled and reset pin /RST activated when timed out. * Select 1Hz clock source for watchdog timer. |