rtc: pcf2127: bugfix: watchdog build dependency

Disable watchdog registation when kernel is build without
watchdog functionality, and enable watchdog core otherwise.
This removes compile errors like the one below:

drivers/rtc/rtc-pcf2127.o: in function `pcf2127_probe.constprop.3':
rtc-pcf2127.c:(.text.unlikely+0x2c8): undefined reference to
`devm_watchdog_register_device'

Watchdog feature in chip will always be configured as
this is safe to do in both cases and minimize code churn.

Reported-by: Hulk Robot <hulkci@huawei.com>
Reported-by: YueHaibing <yuehaibing@huawei.com>
Fixes: bbc597561ce1 ("rtc: pcf2127: add watchdog feature support")
Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Link: https://lore.kernel.org/r/20190827143656.4734-1-bruno.thomsen@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

2 files changed, 3 insertions, 0 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 758f7a417470..da0aceb45095 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -886,6 +886,7 @@ config RTC_DRV_DS3232_HWMON
 config RTC_DRV_PCF2127
         tristate "NXP PCF2127"
         depends on RTC_I2C_AND_SPI
+        select WATCHDOG_CORE if WATCHDOG
         help
           If you say yes here you get support for the NXP PCF2127/29 RTC
           chips with integrated quartz crystal for industrial applications.
diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c
index 3ec87d320766..02b069caffd5 100644
--- a/drivers/rtc/rtc-pcf2127.c
+++ b/drivers/rtc/rtc-pcf2127.c
@@ -475,9 +475,11 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap,
                 return ret;
         }
 
+#ifdef CONFIG_WATCHDOG
         ret = devm_watchdog_register_device(dev, &pcf2127->wdd);
         if (ret)
                 return ret;
+#endif /* CONFIG_WATCHDOG */
 
         /*
          * Disable battery low/switch-over timestamp and interrupts.