If TS72XX_WATCHDOG is y and WATCHDOG_CORE is not enabled or its m, then building fails: drivers/watchdog/ts72xx_wdt.o: in function `ts72xx_wdt_probe': ts72xx_wdt.c:(.text+0x14c): undefined reference to \ `watchdog_init_timeout' ts72xx_wdt.c:(.text+0x15c): undefined reference to \ `devm_watchdog_register_device' Select WATCHDOG_CORE to fix this. Signed-off-by: Shyam Saini <shyam.saini@xxxxxxxxxxxxxxxxxxxx> --- drivers/watchdog/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index cec868f8db3f..62da6e903336 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -669,6 +669,7 @@ config TS4800_WATCHDOG config TS72XX_WATCHDOG tristate "TS-72XX SBC Watchdog" depends on MACH_TS72XX || COMPILE_TEST + select WATCHDOG_CORE help Technologic Systems TS-7200, TS-7250 and TS-7260 boards have watchdog timer implemented in a external CPLD chip. Say Y here -- 2.20.1