mfd: ahc1ec0-wdt: Add sub-device watchdog for Advantech embedded cont…

…roller

This is one of sub-device driver for Advantech embedded controller
AHC1EC0. This driver provide watchdog functionality for Advantech
related applications to restart the system.

Signed-off-by: Shihlun Lin <shihlun.lin@advantech.com.tw>

drivers/mfd/Kconfig

@@ -2135,5 +2135,9 @@ config MFD_AHC1EC0_HWMON
 	  driver provides the sysfs attribues for applications to monitor
 	  the system status.
 
+config MFD_AHC1EC0_WDT
+	tristate "Advantech EC Watchdog Function"
+	depends on MFD_AHC1EC0
+
 endmenu
 endif

drivers/mfd/Makefile

@@ -265,5 +265,6 @@ obj-$(CONFIG_MFD_KHADAS_MCU) 	+= khadas-mcu.o
 
 obj-$(CONFIG_SGI_MFD_IOC3)	+= ioc3.o
 
-obj-$(CONFIG_MFD_AHC1EC0) 	+= ahc1ec0.o
+obj-$(CONFIG_MFD_AHC1EC0)	+= ahc1ec0.o
 obj-$(CONFIG_MFD_AHC1EC0_HWMON)	+= ahc1ec0-hwmon.o
+obj-$(CONFIG_MFD_AHC1EC0_WDT)	+= ahc1ec0-wdt.o