ODROID-N2/C4: dtbs/dtbo: add PPS via GPIO pin #11/#12

This patch addes two device tree overlay files in order to run PPS via
GPIO pins populated in GPIO pin header #11 and #12. By adding the device
tree overlay file to 'config.ini', the driver will be enabled and PPS
will be registered.

In 'config.ini',

	overlays="pps-gpio_p12"

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Change-Id: I2e13c8de7592bd117bb311f3fe2c1bc50901785e

arch/arm64/boot/dts/amlogic/overlays/odroidc4/Makefile

@@ -20,6 +20,8 @@ dtbo-$(CONFIG_ARCH_MESON64_ODROIDC4) += spi0.dtbo		\
 					esp8089.dtbo		\
 					sdio.dtbo		\
 					fanspeed-full.dtbo	\
+					pps-gpio_p11.dtbo	\
+					pps-gpio_p12.dtbo	\
 					pwm_ab.dtbo		\
 					pwm_cd.dtbo		\
 					pwm_ef.dtbo		\

arch/arm64/boot/dts/amlogic/overlays/odroidc4/pps-gpio_p11.dts

@@ -0,0 +1,19 @@
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/meson-g12a-gpio.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	fragment@0 {
+		target-path = "/";
+
+		__overlay__ {
+			pps: pps {
+				compatible = "pps-gpio";
+				gpios = <&gpio GPIOX_3 GPIO_ACTIVE_HIGH>;
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm64/boot/dts/amlogic/overlays/odroidc4/pps-gpio_p12.dts

@@ -0,0 +1,19 @@
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/meson-g12a-gpio.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	fragment@0 {
+		target-path = "/";
+
+		__overlay__ {
+			pps: pps {
+				compatible = "pps-gpio";
+				gpios = <&gpio GPIOX_16 GPIO_ACTIVE_HIGH>;
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm64/boot/dts/amlogic/overlays/odroidn2/Makefile

@@ -18,6 +18,8 @@ dtbo-$(CONFIG_ARCH_MESON64_ODROIDN2) += spi0.dtbo		\
 					fanspeed-full.dtbo	\
 					gpio_spdif.dtbo		\
 					pcf8563.dtbo		\
+					pps-gpio_p11.dtbo	\
+					pps-gpio_p12.dtbo	\
 					pwm_cd.dtbo		\
 					pwm_ef.dtbo		\
 					pwm_c-pwmfan.dtbo	\

arch/arm64/boot/dts/amlogic/overlays/odroidn2/pps-gpio_p11.dts

@@ -0,0 +1,19 @@
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/meson-g12a-gpio.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	fragment@0 {
+		target-path = "/";
+
+		__overlay__ {
+			pps: pps {
+				compatible = "pps-gpio";
+				gpios = <&gpio GPIOX_3 GPIO_ACTIVE_HIGH>;
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm64/boot/dts/amlogic/overlays/odroidn2/pps-gpio_p12.dts

@@ -0,0 +1,19 @@
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/meson-g12a-gpio.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	fragment@0 {
+		target-path = "/";
+
+		__overlay__ {
+			pps: pps {
+				compatible = "pps-gpio";
+				gpios = <&gpio GPIOX_16 GPIO_ACTIVE_HIGH>;
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm64/configs/odroidg12_defconfig

@@ -3327,7 +3327,7 @@ CONFIG_PPS=y
 # CONFIG_PPS_CLIENT_KTIMER is not set
 # CONFIG_PPS_CLIENT_LDISC is not set
 # CONFIG_PPS_CLIENT_PARPORT is not set
-# CONFIG_PPS_CLIENT_GPIO is not set
+CONFIG_PPS_CLIENT_GPIO=y
 
 #
 # PPS generators support