RTC : support DS1307

Change-Id: I3d247ccc639ea0648dac6988daf9ecb0fc2a8fbc
Reviewed-on: https://tp-biosrd-v02/gerrit/81357
Reviewed-by: Scorpio Chang(張志賢) <Scorpio_Chang@asus.com>
Tested-by: Scorpio Chang(張志賢) <Scorpio_Chang@asus.com>

Author: scorpiochang

arch/arm/boot/dts/overlays/Makefile

@@ -10,6 +10,7 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
 	pps-gpio.dtbo \
 	w1-gpio.dtbo \
 	pitft35-resistive-tinker.dtbo \
+	ds1307.dtbo \
 
 targets += dtbs dtbs_install
 targets += $(dtbo-y)

arch/arm/boot/dts/overlays/ds1307-overlay.dts

@@ -0,0 +1,17 @@
+// Definitions for ds1307
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "rockchip,rk3288-miniarm", "rockchip,rk3288";
+
+	fragment@0 {
+		target = <&i2c1>;
+		__overlay__ {
+			rtc: ds1307@68 {
+				compatible = "dallas,ds1307";
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm/boot/dts/rk3288-miniarm.dts

@@ -599,6 +599,11 @@
 
 &i2c1 {
 	status = "okay";
+	rtc: ds1307@68 {
+		compatible = "dallas,ds1307";
+		reg = <0x68>;
+		status = "disabled";
+	};
 };
 
 &i2c3 {

arch/arm/configs/miniarm-rk3288_defconfig

@@ -791,4 +791,4 @@ CONFIG_W1_MASTER_GPIO=y
 CONFIG_W1_SLAVE_THERM=y
 CONFIG_RK_CHAR_DRIVERS=y
 CONFIG_RK3288_DEVGPIOMEM=y
-
+CONFIG_RTC_DRV_DS1307=m