ARM: dts: cm-t54: 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>

1 files changed, 61 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/omap5-cm-t54.dts b/arch/arm/boot/dts/omap5-cm-t54.dts
index 7323b7078cdd..88f3dc6f1835 100644
--- a/arch/arm/boot/dts/omap5-cm-t54.dts
+++ b/arch/arm/boot/dts/omap5-cm-t54.dts
@@ -51,6 +51,13 @@
                 enable-active-high;
         };
 
+        ads7846reg: ads7846-reg {
+                compatible = "regulator-fixed";
+                regulator-name = "ads7846-reg";
+                regulator-min-microvolt = <3300000>;
+                regulator-max-microvolt = <3300000>;
+        };
+
         /* HS USB Host PHY on PORT 2 */
         hsusb2_phy: hsusb2_phy {
                 compatible = "usb-nop-xceiv";
@@ -164,6 +171,15 @@
         };
 };
 
+&omap5_pmx_wkup {
+
+        ads7846_pins: pinmux_ads7846_pins {
+                pinctrl-single,pins = <
+                        0x02 (PIN_INPUT_PULLDOWN | MUX_MODE6)  /* llib_wakereqin.gpio1_wk15 */
+                >;
+        };
+};
+
 &omap5_pmx_core {
         pinctrl-names = "default";
         pinctrl-0 = <
@@ -300,6 +316,51 @@
                         OMAP5_IOPAD(0x013a, PIN_OUTPUT | MUX_MODE3) /* gpio6_187.dispc_data23 */
                 >;
         };
+
+        mcspi2_pins: pinmux_mcspi1_pins {
+                pinctrl-single,pins = <
+                        OMAP5_IOPAD(0x00fc, PIN_INPUT | MUX_MODE0) /* mcspi2_clk */
+                        OMAP5_IOPAD(0x00fe, PIN_INPUT | MUX_MODE0) /* mcspi2_simo */
+                        OMAP5_IOPAD(0x0100, PIN_INPUT | MUX_MODE0) /* mcspi2_somi */
+                        OMAP5_IOPAD(0x0102, PIN_INPUT | MUX_MODE0) /* mcspi2_cs0 */
+                >;
+        };
+};
+
+&mcspi2 {
+        pinctrl-names = "default";
+        pinctrl-0 = <&mcspi2_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 = <&gpio1>;
+                interrupts = <15 0>;                    /* gpio1_wk15 */
+                pendown-gpio = <&gpio1 15 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;
+        };
 };
 
 &mmc1 {