[PATCH linux v3 3/3] arm: dts: Add dt-binding to support ASPEED AST2500 PWM output on zaius

[Jaghathiswari Rankappagounder Natarajan]

The zaius platform has 4 output fans. Add binding data to control the 4 PWM
outputs on ASPEED AST2500 on the zaius platform.

Signed-off-by: Jaghathiswari Rankappagounder Natarajan <jaghu at google.com>
---
v2:
- make the pwmX entries children of the pwm_controller entry.

v3:
- changed/removed some property names to reflect the rules in binding document.

 arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts | 40 ++++++++++++++++++++++++++++++
 arch/arm/boot/dts/aspeed-g5.dtsi           |  6 +++++
 2 files changed, 46 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts b/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
index 8ef4ece..0d5960a 100644
--- a/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
@@ -43,6 +43,46 @@
 			gpios = <&gpio ASPEED_GPIO(H, 7) GPIO_ACTIVE_LOW>;
 		};
 	};
+
+	pwm: pwm-controller at 1e786000 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0x1E786000 0x78>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_pwm1_default
+			&pinctrl_pwm2_default &pinctrl_pwm3_default>;
+		compatible = "aspeed,ast2500-pwm";
+		clocks = <&pwm_typem_clk>;
+		pwm_typem_period = <95>;
+
+		pwm_port0 {
+			pwm_port = /bits/ 8 <0x00>;
+			pwm_enable = /bits/ 8 <0x01>;
+			pwm_type = /bits/ 8 <0x00>;
+			pwm_fan_ctrl = /bits/ 8 <0xFF>;
+		};
+
+		pwm_port1 {
+			pwm_port = /bits/ 8 <0x01>;
+			pwm_enable = /bits/ 8 <0x01>;
+			pwm_type = /bits/ 8 <0x00>;
+			pwm_fan_ctrl = /bits/ 8 <0xFF>;
+		};
+
+		pwm_port2 {
+			pwm_port = /bits/ 8 <0x02>;
+			pwm_enable = /bits/ 8 <0x01>;
+			pwm_type = /bits/ 8 <0x00>;
+			pwm_fan_ctrl = /bits/ 8 <0xFF>;
+		};
+
+		pwm_port3 {
+			pwm_port = /bits/ 8 <0x03>;
+			pwm_enable = /bits/ 8 <0x01>;
+			pwm_type = /bits/ 8 <0x00>;
+			pwm_fan_ctrl = /bits/ 8 <0xFF>;
+		};
+	};
 };

 &fmc {
diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
index 433461b..017cbb7 100644
--- a/arch/arm/boot/dts/aspeed-g5.dtsi
+++ b/arch/arm/boot/dts/aspeed-g5.dtsi
@@ -967,6 +967,12 @@
 				reg = <0x1e6e202c 0x4>;
 			};

+			pwm_typem_clk: fixed_clock0 {
+				#clock-cells = <0>;
+				compatible = "fixed-clock";
+				clock-frequency = <25000>;
+			};
+
 			sram at 1e720000 {
 				compatible = "mmio-sram";
 				reg = <0x1e720000 0x9000>;	// 36K
--
2.8.0.rc3.226.g39d4020