ARM: dts: cm-t3x: add ADS7846 touchscreen support

Add ADS7846 touchscreen support.

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

diff --git a/arch/arm/boot/dts/omap3-cm-t3x.dtsi b/arch/arm/boot/dts/omap3-cm-t3x.dtsi
index e4c0c56..3636fed 100644 (file)
--- a/arch/arm/boot/dts/omap3-cm-t3x.dtsi
+++ b/arch/arm/boot/dts/omap3-cm-t3x.dtsi
@@ -49,6 +49,13 @@
                compatible = "usb-nop-xceiv";
                vcc-supply = <&hsusb2_power>;
        };
+
+       ads7846reg: ads7846-reg {
+               compatible = "regulator-fixed";
+               regulator-name = "ads7846-reg";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+       };
 };
 
 &omap3_pmx_core {
@@ -115,6 +122,21 @@
                        OMAP3_CORE1_IOPAD(0x20e6, PIN_OUTPUT | MUX_MODE0)       /* dss_data5.dss_data5 */
                >;
        };
+
+       ads7846_pins: pinmux_ads7846_pins {
+               pinctrl-single,pins = <
+                       OMAP3_CORE1_IOPAD(0x20ba, PIN_INPUT_PULLUP | MUX_MODE4) /* gpmc_ncs6.gpio_57 */
+               >;
+       };
+
+       mcspi1_pins: pinmux_mcspi1_pins {
+               pinctrl-single,pins = <
+                       OMAP3_CORE1_IOPAD(0x21c8, PIN_INPUT | MUX_MODE0)        /* mcspi1_clk */
+                       OMAP3_CORE1_IOPAD(0x21ca, PIN_INPUT | MUX_MODE0)        /* mcspi1_simo */
+                       OMAP3_CORE1_IOPAD(0x21cc, PIN_INPUT | MUX_MODE0)        /* mcspi1_somi */
+                       OMAP3_CORE1_IOPAD(0x21ce, PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcspi1_cs0 */
+               >;
+       };
 };
 
 &uart3 {
@@ -147,3 +169,38 @@
 &usbhsehci {
        phys = <&hsusb1_phy &hsusb2_phy>;
 };
+
+&mcspi1 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&mcspi1_pins>;
+
+       /* touch controller */
+       ads7846@0 {
+               pinctrl-names = "default";
+               pinctrl-0 = <&ads7846_pins>;
+
+               compatible = "ti,ads7846";
+               vcc-supply = <&ads7846reg>;
+
+               reg = <0>;                      /* CS0 */
+               spi-max-frequency = <1500000>;
+
+               interrupt-parent = <&gpio2>;
+               interrupts = <25 0>;            /* gpio_57 */
+               pendown-gpio = <&gpio2 25 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;
+       };
+};