From: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> commit 71ac13457d9d1007effde65b54818106b2c2b525 upstream. Most boards using the pcf2127 chip (in my bubble) don't make use of the watchdog functionality and the respective output is not connected. The effect on such a board is that there is a watchdog device provided that doesn't work. So only register the watchdog if the device tree has a "reset-source" property. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> [RV: s/has-watchdog/reset-source/] Signed-off-by: Rasmus Villemoes <rasmus.villemoes@xxxxxxxxx> Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20201218101054.25416-3-rasmus.villemoes@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/rtc/rtc-pcf2127.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/rtc/rtc-pcf2127.c +++ b/drivers/rtc/rtc-pcf2127.c @@ -336,7 +336,8 @@ static int pcf2127_watchdog_init(struct u32 wdd_timeout; int ret; - if (!IS_ENABLED(CONFIG_WATCHDOG)) + if (!IS_ENABLED(CONFIG_WATCHDOG) || + !device_property_read_bool(dev, "reset-source")) return 0; pcf2127->wdd.parent = dev;
