ARM: OMAP2+: LogicPD Torpedo: Add Touchscreen Support

The development kit uses a TSC2004 chip attached to I2C3.

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

@@ -204,6 +204,12 @@
 		>;
 	};
 
+	tsc2004_pins: pinmux_tsc2004_pins {
+		pinctrl-single,pins = <
+			OMAP3_CORE1_IOPAD(0x2186, PIN_INPUT | MUX_MODE4)	/* mcbsp4_dr.gpio_153 */
+		>;
+	};
+
 	backlight_pins: pinmux_backlight_pins {
 		pinctrl-single,pins = <
 			OMAP3_CORE1_IOPAD(0x20B8, PIN_OUTPUT | MUX_MODE4)       /* gpmc_ncs5.gpio_56 */
@@ -262,6 +268,27 @@
 	};
 };
 
+&i2c3 {
+	touchscreen: tsc2004@48 {
+		compatible = "ti,tsc2004";
+		reg = <0x48>;
+		vio-supply = <&vaux1>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&tsc2004_pins>;
+		interrupts-extended = <&gpio5 25 IRQ_TYPE_EDGE_RISING>; /* gpio 153 */
+
+		touchscreen-fuzz-x = <4>;
+		touchscreen-fuzz-y = <7>;
+		touchscreen-fuzz-pressure = <2>;
+		touchscreen-size-x = <4096>;
+		touchscreen-size-y = <4096>;
+		touchscreen-max-pressure = <2048>;
+
+		ti,x-plate-ohms = <280>;
+		ti,esd-recovery-timeout-ms = <8000>;
+	};
+};
+
 &uart1 {
 	interrupts-extended = <&intc 72 &omap3_pmx_core OMAP3_UART1_RX>;
 };