rk3288: add watchdot support

arch/arm/boot/dts/rk3288.dtsi

@@ -231,6 +231,19 @@
 		rockchip,count-up = <1>;
 	};
 
+	watchdog:wdt@2004c000 {
+		compatible = "rockchip,watch dog";
+		reg = <0xff800000 0x100>;
+		clocks = <&pclk_pd_alive>;
+		clock-names = "pclk_wdt";
+		interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
+		rockchip,irq = <0>;
+		rockchip,timeout = <60>;
+		rockchip,atboot = <1>;
+		rockchip,debug = <0>;
+		status = "disable";
+	};
+
     amba {
 		#address-cells = <1>;
 		#size-cells = <1>;

drivers/watchdog/Kconfig

@@ -107,31 +107,6 @@ config WM8350_WATCHDOG
 
 # ARM Architecture
 
-config RK29_WATCHDOG
-	tristate "RK29 watchdog"
-	help
-	  Watchdog timer embedded into RK29xx chips. This will reboot your
-	  system when the timeout is reached.
-
-config RK29_FEED_DOG_BY_INTE
-	bool "feed watchdog by interrupt"
-	depends on RK29_WATCHDOG
-
-config RK29_WATCHDOG_ATBOOT
-	bool "start watchdog at system boot"
-	depends on RK29_WATCHDOG
-
-config RK29_WATCHDOG_DEFAULT_TIME
-	int "set watchdog time out value (unit second)"
-	default 0
-	depends on RK29_WATCHDOG
-	help
-	  the real time out value is two times more than the setting value
-
-config RK29_WATCHDOG_DEBUG
-	bool "enable watchdog debug"
-	depends on RK29_WATCHDOG
-
 config ARM_SP805_WATCHDOG
 	tristate "ARM SP805 Watchdog"
 	depends on ARM && ARM_AMBA

drivers/watchdog/Makefile

@@ -50,7 +50,7 @@ obj-$(CONFIG_ORION_WATCHDOG) += orion_wdt.o
 obj-$(CONFIG_COH901327_WATCHDOG) += coh901327_wdt.o
 obj-$(CONFIG_STMP3XXX_RTC_WATCHDOG) += stmp3xxx_rtc_wdt.o
 obj-$(CONFIG_NUC900_WATCHDOG) += nuc900_wdt.o
-obj-$(CONFIG_RK29_WATCHDOG) += rk29_wdt.o
+obj-$(CONFIG_ARCH_ROCKCHIP) += rk29_wdt.o
 obj-$(CONFIG_TS72XX_WATCHDOG) += ts72xx_wdt.o
 obj-$(CONFIG_IMX2_WDT) += imx2_wdt.o
 obj-$(CONFIG_UX500_WATCHDOG) += ux500_wdt.o

drivers/watchdog/rk29_wdt.c

@@ -75,7 +75,7 @@
 */
 
 static int nowayout	= WATCHDOG_NOWAYOUT;
-static int tmr_margin	= CONFIG_RK29_WATCHDOG_DEFAULT_TIME;
+static int tmr_margin	= 100;//CONFIG_RK29_WATCHDOG_DEFAULT_TIME;
 #ifdef CONFIG_RK29_WATCHDOG_ATBOOT
 static int tmr_atboot	= 1;
 #else