ARM: dts: AM33XX: Add PWMSS device tree nodes

Add PWMSS device tree nodes in relation with ECAP & EHRPWM DT nodes to
AM33XX SoC family. Also populates device tree nodes for ECAP & EHRPWM by
adding necessary properties like pwm-cells, base reg & set disabled as
status.
Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>

arch/arm/boot/dts/am33xx.dtsi

@@ -346,6 +346,90 @@ usb@47400000 {
 			ti,hwmods = "usb_otg_hs";
 		};
 
+		epwmss0: epwmss@48300000 {
+			compatible = "ti,am33xx-pwmss";
+			reg = <0x48300000 0x10>;
+			ti,hwmods = "epwmss0";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			status = "disabled";
+			ranges = <0x48300100 0x48300100 0x80   /* ECAP */
+				  0x48300180 0x48300180 0x80   /* EQEP */
+				  0x48300200 0x48300200 0x80>; /* EHRPWM */
+
+			ecap0: ecap@48300100 {
+				compatible = "ti,am33xx-ecap";
+				#pwm-cells = <3>;
+				reg = <0x48300100 0x80>;
+				ti,hwmods = "ecap0";
+				status = "disabled";
+			};
+
+			ehrpwm0: ehrpwm@48300200 {
+				compatible = "ti,am33xx-ehrpwm";
+				#pwm-cells = <3>;
+				reg = <0x48300200 0x80>;
+				ti,hwmods = "ehrpwm0";
+				status = "disabled";
+			};
+		};
+
+		epwmss1: epwmss@48302000 {
+			compatible = "ti,am33xx-pwmss";
+			reg = <0x48302000 0x10>;
+			ti,hwmods = "epwmss1";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			status = "disabled";
+			ranges = <0x48302100 0x48302100 0x80   /* ECAP */
+				  0x48302180 0x48302180 0x80   /* EQEP */
+				  0x48302200 0x48302200 0x80>; /* EHRPWM */
+
+			ecap1: ecap@48302100 {
+				compatible = "ti,am33xx-ecap";
+				#pwm-cells = <3>;
+				reg = <0x48302100 0x80>;
+				ti,hwmods = "ecap1";
+				status = "disabled";
+			};
+
+			ehrpwm1: ehrpwm@48302200 {
+				compatible = "ti,am33xx-ehrpwm";
+				#pwm-cells = <3>;
+				reg = <0x48302200 0x80>;
+				ti,hwmods = "ehrpwm1";
+				status = "disabled";
+			};
+		};
+
+		epwmss2: epwmss@48304000 {
+			compatible = "ti,am33xx-pwmss";
+			reg = <0x48304000 0x10>;
+			ti,hwmods = "epwmss2";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			status = "disabled";
+			ranges = <0x48304100 0x48304100 0x80   /* ECAP */
+				  0x48304180 0x48304180 0x80   /* EQEP */
+				  0x48304200 0x48304200 0x80>; /* EHRPWM */
+
+			ecap2: ecap@48304100 {
+				compatible = "ti,am33xx-ecap";
+				#pwm-cells = <3>;
+				reg = <0x48304100 0x80>;
+				ti,hwmods = "ecap2";
+				status = "disabled";
+			};
+
+			ehrpwm2: ehrpwm@48304200 {
+				compatible = "ti,am33xx-ehrpwm";
+				#pwm-cells = <3>;
+				reg = <0x48304200 0x80>;
+				ti,hwmods = "ehrpwm2";
+				status = "disabled";
+			};
+		};
+
 		mac: ethernet@4a100000 {
 			compatible = "ti,cpsw";
 			ti,hwmods = "cpgmac0";