ARM: dts: imx6sl-evk: Add headphone detection for sound card

Headphone detection is triggered by GPIO, then driver can
switch between speaker and headphone.

Signed-off-by: Shengjiu Wang <[e-mail]>
Reviewed-by: Fabio Estevam <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6sl-evk.dts

···
 
 	sound {
 		compatible = "fsl,imx6sl-evk-wm8962", "fsl,imx-audio-wm8962";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_hp>;
 		model = "wm8962-audio";
 		ssi-controller = <&ssi2>;
 		audio-codec = <&codec>;
···
 			"IN3R", "AMIC";
 		mux-int-port = <2>;
 		mux-ext-port = <3>;
+		hp-det-gpio = <&gpio4 19 GPIO_ACTIVE_LOW>;
 	};
 
 	panel {
···
 				MX6SL_PAD_FEC_TXD0__GPIO4_IO24     0x3080
 				MX6SL_PAD_FEC_TXD1__GPIO4_IO16     0x3080
 				MX6SL_PAD_FEC_REF_CLK__GPIO4_IO26  0x3080
+			>;
+		};
+
+		pinctrl_hp: hpgrp {
+			fsl,pins = <
+				MX6SL_PAD_FEC_RX_ER__GPIO4_IO19	  0x1b0b0
 			>;
 		};