ARM: dts: omap3-devkit8000: Add ADS7846 Touchscreen support

This patch is the touchscreen part for LCD screens sold with devkit8000
board.

Signed-off-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/omap3-devkit8000-lcd-common.dtsi b/arch/arm/boot/dts/omap3-devkit8000-lcd-common.dtsi
index 332766d12b3a..e84184de2a4a 100644
--- a/arch/arm/boot/dts/omap3-devkit8000-lcd-common.dtsi
+++ b/arch/arm/boot/dts/omap3-devkit8000-lcd-common.dtsi
@@ -36,3 +36,38 @@
                 };
         };
 };
+
+&vio {
+        regulator-min-microvolt = <1800000>;
+        regulator-max-microvolt = <1800000>;
+};
+
+&mcspi2 {
+
+        /* touch controller */
+        ads7846@0 {
+                compatible = "ti,ads7846";
+                vcc-supply = <&vio>;
+
+                reg = <0>;                      /* CS0 */
+                spi-max-frequency = <1500000>;
+
+                interrupt-parent = <&gpio1>;
+                interrupts = <27 0>;            /* gpio_27 */
+                pendown-gpio = <&gpio1 27 0>;
+
+                ti,x-min = /bits/ 16 <0x0>;
+                ti,x-max = /bits/ 16 <0x0fff>;
+                ti,y-min = /bits/ 16 <0x0>;
+                ti,y-max = /bits/ 16 <0x0fff>;
+                ti,x-plate-ohms = /bits/ 16 <180>;
+                ti,pressure-max = /bits/ 16 <255>;
+                ti,debounce-max = /bits/ 16 <10>;
+                ti,debounce-tol = /bits/ 16 <5>;
+                ti,debounce-rep = /bits/ 16 <1>;
+                ti,keep-vref-on = <1>;
+                ti,settle-delay-usec = /bits/ 16 <150>;
+
+                linux,wakeup;
+        };
+};