ARM: DT: Add DT entry for PWMs and Backlight

Add DT entry for PWM controller and Backlight for NVIDIA's
Tegra 114,124 SoCs.It has 4 PWM controllers.

Bug 1256106

Change-Id: Ia927d3231db1a07490b5027c1f23d8e736173f30
Signed-off-by: Ajay Nandakumar <anandakumarm@nvidia.com>
Reviewed-on: http://git-master/r/299035
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>

13 files changed, 83 insertions, 1 deletions

diff --git a/arch/arm/boot/dts/tegra114-dalmore.dts b/arch/arm/boot/dts/tegra114-dalmore.dts
index 5dc5b14cde6e..12862916790d 100644
--- a/arch/arm/boot/dts/tegra114-dalmore.dts
+++ b/arch/arm/boot/dts/tegra114-dalmore.dts
@@ -12,6 +12,13 @@
 		};
 	};
 
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 1000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
+
 	pinmux {
 		pinctrl-names = "default";
 		pinctrl-0 = <&state_default>;
diff --git a/arch/arm/boot/dts/tegra114-macallan.dts b/arch/arm/boot/dts/tegra114-macallan.dts
index 44707e7394ac..30100aa245bf 100644
--- a/arch/arm/boot/dts/tegra114-macallan.dts
+++ b/arch/arm/boot/dts/tegra114-macallan.dts
@@ -12,6 +12,13 @@
 		};
 	};
 
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 1000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
+
 	pinmux {
 		pinctrl-names = "default";
 		pinctrl-0 = <&state_default>;
diff --git a/arch/arm/boot/dts/tegra114-pluto.dts b/arch/arm/boot/dts/tegra114-pluto.dts
index 161f1e4514f4..7a18b2e9d9b8 100644
--- a/arch/arm/boot/dts/tegra114-pluto.dts
+++ b/arch/arm/boot/dts/tegra114-pluto.dts
@@ -23,6 +23,13 @@
 		};
 	};
 
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 1000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
+
 	pinmux {
 		pinctrl-names = "default";
 		pinctrl-0 = <&state_default>;
diff --git a/arch/arm/boot/dts/tegra114-roth.dts b/arch/arm/boot/dts/tegra114-roth.dts
index dbeb7ccab374..8436eb75142d 100644
--- a/arch/arm/boot/dts/tegra114-roth.dts
+++ b/arch/arm/boot/dts/tegra114-roth.dts
@@ -25,6 +25,13 @@
 		};
 	};
 
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 40000>;
+		max-brightness = <255>;
+		default-brightness = <77>;
+	};
+
 	pmc {
 		status = "okay";
 		nvidia,invert-interrupt;
diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
index 3067aef87abc..a25c62bdc50d 100644
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@@ -291,7 +291,6 @@
 		reg = <0x7000a000 0x100>;
 		#pwm-cells = <2>;
 		clocks = <&tegra_car 17>;
-		status = "disabled";
 	};
 
 	i2c1: i2c@7000c000 {
diff --git a/arch/arm/boot/dts/tegra124-ardbeg.dts b/arch/arm/boot/dts/tegra124-ardbeg.dts
index 8ed179dd5269..d942372a7a45 100644
--- a/arch/arm/boot/dts/tegra124-ardbeg.dts
+++ b/arch/arm/boot/dts/tegra124-ardbeg.dts
@@ -92,4 +92,11 @@
 		pout-gpio = <&gpio 190 0>;
 		tout-gpio = <&gpio 112 0>;
 	};
+
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 1000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
 };
diff --git a/arch/arm/boot/dts/tegra124-bonaire.dts b/arch/arm/boot/dts/tegra124-bonaire.dts
index 50098f7eb660..ebc01dc25bbf 100644
--- a/arch/arm/boot/dts/tegra124-bonaire.dts
+++ b/arch/arm/boot/dts/tegra124-bonaire.dts
@@ -19,4 +19,11 @@
 		device_type = "memory";
 		reg = <0x80000000 0x20000000>;
 	};
+
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 2 5000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
 };
diff --git a/arch/arm/boot/dts/tegra124-bonaire_sim.dts b/arch/arm/boot/dts/tegra124-bonaire_sim.dts
index 5e4b57bb371b..4383048beb51 100644
--- a/arch/arm/boot/dts/tegra124-bonaire_sim.dts
+++ b/arch/arm/boot/dts/tegra124-bonaire_sim.dts
@@ -18,4 +18,11 @@
 		device_type = "memory";
 		reg = <0x80000000 0x20000000>;
 	};
+
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 1000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
 };
diff --git a/arch/arm/boot/dts/tegra124-laguna.dts b/arch/arm/boot/dts/tegra124-laguna.dts
index 2d24324b348c..00ae376f3d12 100644
--- a/arch/arm/boot/dts/tegra124-laguna.dts
+++ b/arch/arm/boot/dts/tegra124-laguna.dts
@@ -85,4 +85,11 @@
 		nvidia,core-power-req-active-high;
 		nvidia,sys-clock-req-active-high;
 	};
+
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 1000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
 };
diff --git a/arch/arm/boot/dts/tegra124-loki.dts b/arch/arm/boot/dts/tegra124-loki.dts
index 5ae9d8e5aad4..2f604675d1a5 100644
--- a/arch/arm/boot/dts/tegra124-loki.dts
+++ b/arch/arm/boot/dts/tegra124-loki.dts
@@ -85,4 +85,11 @@
 		nvidia,core-power-req-active-high;
 		nvidia,sys-clock-req-active-high;
 	};
+
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 40000>;
+		max-brightness = <255>;
+		default-brightness = <77>;
+	};
 };
diff --git a/arch/arm/boot/dts/tegra124-soc.dtsi b/arch/arm/boot/dts/tegra124-soc.dtsi
index 53d4b2d87d31..26920ebed2ac 100644
--- a/arch/arm/boot/dts/tegra124-soc.dtsi
+++ b/arch/arm/boot/dts/tegra124-soc.dtsi
@@ -41,6 +41,13 @@
 		#clock-cells = <1>;
 	};
 
+	pwm: pwm {
+		compatible = "nvidia,tegra124-pwm", "nvidia,tegra20-pwm";
+		reg = <0x7000a000 0x100>;
+		#pwm-cells = <2>;
+		clocks = <&tegra_car 17>;
+	};
+
 	apbdma: dma@60020000 {
 		compatible = "nvidia,tegra124-apbdma";
 		reg = <0x60020000 0x1400>;
diff --git a/arch/arm/boot/dts/tegra124-tn8.dts b/arch/arm/boot/dts/tegra124-tn8.dts
index d97c4fab0a0b..b1c74497a64a 100644
--- a/arch/arm/boot/dts/tegra124-tn8.dts
+++ b/arch/arm/boot/dts/tegra124-tn8.dts
@@ -147,5 +147,11 @@
 
 /include/ "tegra124-tn8-generic.dtsi"
 
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 1000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
 };
 
diff --git a/arch/arm/boot/dts/tegra124-vcm30_t124.dts b/arch/arm/boot/dts/tegra124-vcm30_t124.dts
index cfbbe1146bb5..c2ff8a5ba69c 100644
--- a/arch/arm/boot/dts/tegra124-vcm30_t124.dts
+++ b/arch/arm/boot/dts/tegra124-vcm30_t124.dts
@@ -42,4 +42,11 @@
 			status = "okay";
 		};
 	};
+
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 1 1000000>;
+		max-brightness = <255>;
+		default-brightness = <224>;
+	};
 };