Suppot pps-gpio overlay

Change-Id: I90a51ba3dbefed5d955716b9340f2b9470a19147
Reviewed-on: https://tp-biosrd-v02/gerrit/80802
Reviewed-by: Yuehtsang Li(李岳蒼) <[email protected]>
Tested-by: Yuehtsang Li(李岳蒼) <[email protected]>

Author: ennice_yang

arch/arm/boot/dts/overlays/Makefile

@@ -7,6 +7,7 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
 	iqaudio-dacplus.dtbo \
 	waveshare35a-tinker.dtbo \
 	waveshare32b-tinker.dtbo \
+	pps-gpio.dtbo \
 
 targets += dtbs dtbs_install
 targets += $(dtbo-y)

arch/arm/boot/dts/overlays/pps-gpio-overlay.dts

@@ -0,0 +1,28 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+    compatible = "rockchip,rk3288-miniarm", "rockchip,rk3288";
+    fragment@0 {
+        target-path = "/";
+        __overlay__ {
+        pps: pps {
+            compatible = "pps-gpio";
+            pinctrl-names = "default";
+            pinctrl-0 = <&pps_pins>;
+            gpios = <&gpio5 19 0>;
+            status = "okay";
+        };
+        };
+    };
+
+    fragment@1 {
+        target = <&gpio5>;
+        __overlay__ {
+        pps_pins: pps_pins {
+            rockchip,pins = <5 19 0 &pcfg_pull_none>;
+        };
+        };
+    };
+};
+

arch/arm/configs/miniarm-rk3288_defconfig

@@ -776,3 +776,4 @@ CONFIG_TEXTSEARCH=y
 CONFIG_TEXTSEARCH_KMP=y
 CONFIG_TEXTSEARCH_BM=y
 CONFIG_TEXTSEARCH_FSM=y
+CONFIG_PPS_CLIENT_GPIO=y