ARM: dts: am57xx: cl-som-am57x: add touchscreen support

Add ADS7846 touchscreen support.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am57xx-cl-som-am57x.dts b/arch/arm/boot/dts/am57xx-cl-som-am57x.dts
index c603136..a75c382 100644 (file)
--- a/arch/arm/boot/dts/am57xx-cl-som-am57x.dts
+++ b/arch/arm/boot/dts/am57xx-cl-som-am57x.dts
@@ -43,6 +43,13 @@
                regulator-min-microvolt = <3300000>;
                regulator-max-microvolt = <3300000>;
        };
+
+       ads7846reg: fixedregulator-ads7846-reg {
+               compatible = "regulator-fixed";
+               regulator-name = "ads7846-reg";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+       };
 };
 
 &dra7_pmx_core {
@@ -183,6 +190,12 @@
                        DRA7XX_CORE_IOPAD(0x3594, PIN_INPUT | MUX_MODE15)
                >;
        };
+
+       ads7846_pins: pinmux_ads7846_pins {
+               pinctrl-single,pins = <
+                       DRA7XX_CORE_IOPAD(0x3464, PIN_INPUT_PULLDOWN | MUX_MODE14) /* gpmc_a9.gpio1_31 */
+               >;
+       };
 };
 
 &i2c1 {
@@ -451,6 +464,37 @@
                        reg = <0x100000 0x0>;
                };
        };
+
+       /* touch controller */
+       ads7846@0 {
+               pinctrl-names = "default";
+               pinctrl-0 = <&ads7846_pins>;
+
+               compatible = "ti,ads7846";
+               vcc-supply = <&ads7846reg>;
+
+               reg = <1>;                              /* CS1 */
+               spi-max-frequency = <1500000>;
+
+               interrupt-parent = <&gpio1>;
+               interrupts = <31 0>;
+               pendown-gpio = <&gpio1 31 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 <30>;
+               ti,debounce-tol = /bits/ 16 <10>;
+               ti,debounce-rep = /bits/ 16 <1>;
+
+               linux,wakeup;
+       };
 };
 
 &mac {