ARM: dts: hummingboard: Setup pwm lines

Setup pwm lines as follows -
pwm1: In case HummingBoard base carrier; this pin drives through a serial
      capacitor the mono out of the audio jack.
      In case HummingBoard pro the this pad can be reached by wiring to
      C8 capacitors on the board.
pwm2: Setup pwm2 on gpio-1 but leave the default function of the iopad as
      a gpio.
      The user can change the io pad mux in user space and therefore use
      this function on gpio-1 (pin number 7 on the 26 pin header).

pwm3,pwm4: unused

Signed-off-by: Rabeeh Khoury <[email protected]>

arch/arm/boot/dts/imx6qdl-hummingboard.dtsi

@@ -273,6 +273,13 @@
 				MX6QDL_PAD_EIM_DA4__GPIO3_IO04 0x80000000
 			>;
 		};
+
+		pinctrl_pwm1: pwm1grp {
+			fsl,pins = <
+				MX6QDL_PAD_DISP0_DAT8__PWM1_OUT 0x1b0b1
+			>;
+		};
+
 	};
 };
 
@@ -339,3 +346,22 @@
 	no-msi;
 };
 
+&pwm1 {
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_pwm1>;
+        status = "okay";
+};
+
+&pwm2 {
+        pinctrl-names = "default";
+        status = "okay";
+};
+
+&pwm3 {
+	status = "disabled";
+};
+
+&pwm4 {
+	status = "disabled";
+};
+