diff options
Diffstat (limited to 'drivers/rtc/rtc-pcf2127.c')
| -rw-r--r-- | drivers/rtc/rtc-pcf2127.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c index 02b069caffd5..ba5baaca47be 100644 --- a/drivers/rtc/rtc-pcf2127.c +++ b/drivers/rtc/rtc-pcf2127.c @@ -417,6 +417,7 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap, const char *name, bool has_nvmem) { struct pcf2127 *pcf2127; + u32 wdd_timeout; int ret = 0; dev_dbg(dev, "%s\n", __func__); @@ -459,7 +460,6 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap, /* * Watchdog timer enabled and reset pin /RST activated when timed out. * Select 1Hz clock source for watchdog timer. - * Timer is not started until WD_VAL is loaded with a valid value. * Note: Countdown timer disabled and not available. */ ret = regmap_update_bits(pcf2127->regmap, PCF2127_REG_WD_CTL, @@ -475,6 +475,14 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap, return ret; } + /* Test if watchdog timer is started by bootloader */ + ret = regmap_read(pcf2127->regmap, PCF2127_REG_WD_VAL, &wdd_timeout); + if (ret) + return ret; + + if (wdd_timeout) + set_bit(WDOG_HW_RUNNING, &pcf2127->wdd.status); + #ifdef CONFIG_WATCHDOG ret = devm_watchdog_register_device(dev, &pcf2127->wdd); if (ret) |