If WATCHDOG_CORE is not set, build fails: drivers/rtc/rtc-pcf2127.o: In function `pcf2127_probe.isra.6': drivers/rtc/rtc-pcf2127.c:478: undefined reference to `devm_watchdog_register_device' Add WATCHDOG_CORE Kconfig dependency to fix this. Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Fixes: bbc597561ce1 ("rtc: pcf2127: add watchdog feature support") Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx> --- drivers/rtc/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 25af63d..9dce7dc 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -886,6 +886,8 @@ config RTC_DRV_DS3232_HWMON config RTC_DRV_PCF2127 tristate "NXP PCF2127" depends on RTC_I2C_AND_SPI + depends on WATCHDOG + select WATCHDOG_CORE help If you say yes here you get support for the NXP PCF2127/29 RTC chips with integrated quartz crystal for industrial applications. -- 2.7.4