ARM64: dts: bcm2710-rpi-3-b: Adds buttons for speaker profile

Tizen Speaker Profile uses a keypad that consists of 5 buttons for
up/down/left/right/center. The buttons are connected to GPIO pins as
follows.

GPIO16 : KEY_VOLUMEUP
GPIO13 : KEY_VOLUMEDOWN
GPIO6 : KEY_FASTFORWARD
GPIO12 : KEY_REWIND
GPIO26 : KEY_PLAYPAUSE

gpio=6,12,13,16,26=ip,pu at config.txt means that 6,12,13,16,26 pins are used as
input and pullup mode.

Change-Id: I8b7fe4fa360c2d17042e31270702d7abe49a5977
Signed-off-by: Jaechul Lee <jcsing.lee@samsung.com>

4 files changed, 138 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts b/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
index d9a3f6f07b70..841a361ec959 100644
--- a/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
@@ -7,6 +7,7 @@
 #include "bcm2710.dtsi"
 #include "bcm283x-rpi-lan7515.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
+#include <dt-bindings/input/input.h>
 
 / {
 	compatible = "raspberrypi,3-model-b-plus", "brcm,bcm2837";
@@ -33,6 +34,40 @@
 		firmware = <&firmware>;
 		status = "okay";
 	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		key-up {
+			lable = "up";
+			linux,code = <KEY_VOLUMEUP>;
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		key-down {
+			lable = "down";
+			linux,code = <KEY_VOLUMEDOWN>;
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		key-left {
+			lable = "left";
+			linux,code = <KEY_FASTFORWARD>;
+			gpios = <&gpio 6 GPIO_ACTIVE_LOW>;
+		};
+
+		key-right {
+			lable = "right";
+			linux,code = <KEY_REWIND>;
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+		};
+
+		key-center {
+			lable = "center";
+			linux,code = <KEY_PLAYPAUSE>;
+			gpios = <&gpio 26 GPIO_ACTIVE_LOW>;
+		};
+	};
 };
 
 &gpio {
@@ -89,6 +124,37 @@
 		brcm,pins = <40 41>;
 		brcm,function = <4>;
 	};
+
+	/* Needs to describe gpio settings at config.txt */
+	key_up: key_up {
+		brcm,pins = <16>;
+		brcm,function = <1>; /* BCM2835_FSEL_GPIO_IN */
+		brcm,pull = <2>; /* BCM2835_PUD_UP */
+	};
+
+	key_down: key_down {
+		brcm,pins = <13>;
+		brcm,function = <1>;
+		brcm,pull = <2>;
+	};
+
+	key_left: key_left {
+		brcm,pins = <6>;
+		brcm,function = <1>;
+		brcm,pull = <2>;
+	};
+
+	key_right: key_right {
+		brcm,pins = <12>;
+		brcm,function = <1>;
+		brcm,pull = <2>;
+	};
+
+	key_center: key_center {
+		brcm,pins = <26>;
+		brcm,function = <1>;
+		brcm,pull = <2>;
+	};
 };
 
 &mmcnr {
diff --git a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
index 924b29640f8e..90f33ba01ca9 100644
--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
@@ -7,6 +7,7 @@
 #include "bcm2710.dtsi"
 #include "bcm283x-rpi-smsc9514.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
+#include <dt-bindings/input/input.h>
 
 / {
 	compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
@@ -33,6 +34,40 @@
 		firmware = <&firmware>;
 		status = "okay";
 	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		key-up {
+			lable = "up";
+			linux,code = <KEY_VOLUMEUP>;
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		key-down {
+			lable = "down";
+			linux,code = <KEY_VOLUMEDOWN>;
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		key-left {
+			lable = "left";
+			linux,code = <KEY_FASTFORWARD>;
+			gpios = <&gpio 6 GPIO_ACTIVE_LOW>;
+		};
+
+		key-right {
+			lable = "right";
+			linux,code = <KEY_REWIND>;
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+		};
+
+		key-center {
+			lable = "center";
+			linux,code = <KEY_PLAYPAUSE>;
+			gpios = <&gpio 26 GPIO_ACTIVE_LOW>;
+		};
+	};
 };
 
 &gpio {
@@ -89,6 +124,37 @@
 		brcm,pins = <40 41>;
 		brcm,function = <4>;
 	};
+
+	/* Needs to describe gpio settings at config.txt */
+	key_up: key_up {
+		brcm,pins = <16>;
+		brcm,function = <1>; /* BCM2835_FSEL_GPIO_IN */
+		brcm,pull = <2>; /* BCM2835_PUD_UP */
+	};
+
+	key_down: key_down {
+		brcm,pins = <13>;
+		brcm,function = <1>;
+		brcm,pull = <2>;
+	};
+
+	key_left: key_left {
+		brcm,pins = <6>;
+		brcm,function = <1>;
+		brcm,pull = <2>;
+	};
+
+	key_right: key_right {
+		brcm,pins = <12>;
+		brcm,function = <1>;
+		brcm,pull = <2>;
+	};
+
+	key_center: key_center {
+		brcm,pins = <26>;
+		brcm,function = <1>;
+		brcm,pull = <2>;
+	};
 };
 
 &mmcnr {
diff --git a/rpi3/boot/config_32bit.txt b/rpi3/boot/config_32bit.txt
index 5874929afc52..20c5c1f57274 100644
--- a/rpi3/boot/config_32bit.txt
+++ b/rpi3/boot/config_32bit.txt
@@ -83,3 +83,6 @@ disable_camera_led=1
 
 # Minimum GPU memory for camera use
 gpu_mem=128
+
+# Set gpio pins to Input, Pullup mode.
+gpio=6,12,13,16,26=ip,pu
diff --git a/rpi3/boot/config_64bit.txt b/rpi3/boot/config_64bit.txt
index dd5ec8b2f32e..228d9459dcf4 100644
--- a/rpi3/boot/config_64bit.txt
+++ b/rpi3/boot/config_64bit.txt
@@ -83,3 +83,6 @@ disable_camera_led=1
 
 # Minimum GPU memory for camera use
 gpu_mem=128
+
+# Set gpio pins to Input, Pullup mode.
+gpio=6,12,13,16,26=ip,pu