ARM: OMAP2+: LogicPD Torpedo: Add LCD Type 15 Support

Add basic support for Logic PD type 15 display for older development kits.
This uses GPIO for the backlight.
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts

@@ -114,6 +114,70 @@ ethernet@gpmc {
 	};
 };
 
+&vpll2 {
+	regulator-always-on;
+};
+
+&dss {
+	status = "ok";
+	vdds_dsi-supply = <&vpll2>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&dss_dpi_pins1>;
+	port {
+		dpi_out: endpoint {
+			remote-endpoint = <&lcd_in>;
+			data-lines = <16>;
+		};
+	};
+};
+
+/ {
+	aliases {
+		display0 = &lcd0;
+	};
+
+	lcd0: display@0 {
+		compatible = "panel-dpi";
+		label = "15";
+		status = "okay";
+		/* default-on; */
+		pinctrl-names = "default";
+		enable-gpios = <&gpio5 27 GPIO_ACTIVE_HIGH>;	/* gpio155, lcd INI */
+
+		port {
+			lcd_in: endpoint {
+				remote-endpoint = <&dpi_out>;
+			};
+		};
+
+		panel-timing {
+			clock-frequency = <9000000>;
+			hactive = <480>;
+			vactive = <272>;
+			hfront-porch = <3>;
+			hback-porch = <2>;
+			hsync-len = <42>;
+			vback-porch = <3>;
+			vfront-porch = <4>;
+			vsync-len = <11>;
+			hsync-active = <0>;
+			vsync-active = <0>;
+			de-active = <1>;
+			pixelclk-active = <1>;
+		};
+	};
+
+	bl: backlight {
+		compatible = "gpio-backlight";
+		pinctrl-names = "default";
+		pinctrl-0 = <&backlight_pins>;
+
+		gpios = <&gpio2 24 GPIO_ACTIVE_HIGH>, /* gpio_56 */
+			<&gpio5 26 GPIO_ACTIVE_HIGH>; /* gpio_154 */
+		default-on;
+	};
+};
+
 &mmc1 {
 	interrupts-extended = <&intc 83 &omap3_pmx_core 0x11a>;
 	pinctrl-names = "default";
@@ -149,6 +213,42 @@ OMAP3_CORE1_IOPAD(0x214c, PIN_INPUT | MUX_MODE0)	/* sdmmc1_dat2.sdmmc1_dat2 */
 			OMAP3_CORE1_IOPAD(0x214e, PIN_INPUT | MUX_MODE0)	/* sdmmc1_dat3.sdmmc1_dat3 */
 		>;
 	};
+
+	backlight_pins: pinmux_backlight_pins {
+		pinctrl-single,pins = <
+			OMAP3_CORE1_IOPAD(0x20B8, PIN_OUTPUT | MUX_MODE4)       /* gpmc_ncs5.gpio_56 */
+			OMAP3_CORE1_IOPAD(0x2188, PIN_OUTPUT | MUX_MODE4)       /* mcbsp4_dx.gpio_154 */
+		>;
+	};
+
+	dss_dpi_pins1: pinmux_dss_dpi_pins1 {
+		pinctrl-single,pins = <
+			OMAP3_CORE1_IOPAD(0x20d4, PIN_OUTPUT | MUX_MODE0)   /* dss_pclk.dss_pclk */
+			OMAP3_CORE1_IOPAD(0x20d6, PIN_OUTPUT | MUX_MODE0)   /* dss_hsync.dss_hsync */
+			OMAP3_CORE1_IOPAD(0x20d8, PIN_OUTPUT | MUX_MODE0)   /* dss_vsync.dss_vsync */
+			OMAP3_CORE1_IOPAD(0x20da, PIN_OUTPUT | MUX_MODE0)   /* dss_acbias.dss_acbias */
+
+			OMAP3_CORE1_IOPAD(0x20e8, PIN_OUTPUT | MUX_MODE0)   /* dss_data6.dss_data6 */
+			OMAP3_CORE1_IOPAD(0x20ea, PIN_OUTPUT | MUX_MODE0)   /* dss_data7.dss_data7 */
+			OMAP3_CORE1_IOPAD(0x20ec, PIN_OUTPUT | MUX_MODE0)   /* dss_data8.dss_data8 */
+			OMAP3_CORE1_IOPAD(0x20ee, PIN_OUTPUT | MUX_MODE0)   /* dss_data9.dss_data9 */
+			OMAP3_CORE1_IOPAD(0x20f0, PIN_OUTPUT | MUX_MODE0)   /* dss_data10.dss_data10 */
+			OMAP3_CORE1_IOPAD(0x20f2, PIN_OUTPUT | MUX_MODE0)   /* dss_data11.dss_data11 */
+			OMAP3_CORE1_IOPAD(0x20f4, PIN_OUTPUT | MUX_MODE0)   /* dss_data12.dss_data12 */
+			OMAP3_CORE1_IOPAD(0x20f6, PIN_OUTPUT | MUX_MODE0)   /* dss_data13.dss_data13 */
+			OMAP3_CORE1_IOPAD(0x20f8, PIN_OUTPUT | MUX_MODE0)   /* dss_data14.dss_data14 */
+			OMAP3_CORE1_IOPAD(0x20fa, PIN_OUTPUT | MUX_MODE0)   /* dss_data15.dss_data15 */
+			OMAP3_CORE1_IOPAD(0x20fc, PIN_OUTPUT | MUX_MODE0)   /* dss_data16.dss_data16 */
+			OMAP3_CORE1_IOPAD(0x20fe, PIN_OUTPUT | MUX_MODE0)   /* dss_data17.dss_data17 */
+
+			OMAP3_CORE1_IOPAD(0x2100, PIN_OUTPUT | MUX_MODE3)   /* dss_data18.dss_data0 */
+			OMAP3_CORE1_IOPAD(0x2102, PIN_OUTPUT | MUX_MODE3)   /* dss_data19.dss_data1 */
+			OMAP3_CORE1_IOPAD(0x2104, PIN_OUTPUT | MUX_MODE3)   /* dss_data20.dss_data2 */
+			OMAP3_CORE1_IOPAD(0x2106, PIN_OUTPUT | MUX_MODE3)   /* dss_data21.dss_data3 */
+			OMAP3_CORE1_IOPAD(0x2108, PIN_OUTPUT | MUX_MODE3)   /* dss_data22.dss_data4 */
+			OMAP3_CORE1_IOPAD(0x210a, PIN_OUTPUT | MUX_MODE3)   /* dss_data23.dss_data5 */
+		>;
+	};
 };
 
 &omap3_pmx_wkup {