ARM: dts: imx6ul-isiot-common: Add touchscreen node

Add touchscreen node as i2c1 slave device on Engicam Is.IoT MX6UL
modules, the touchscreen controlled 'st,stmpe-ts' connected via
i2c with st,stmpe811 mfd interface.

Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx6ul-isiot-common.dtsi b/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
index 9660e20eacb68e75b8ec05003661392cfe2cc53b..2beaab6e272e51df5e71a602eeceaa6bdd185ccf 100644 (file)
--- a/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
+++ b/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
@@ -40,6 +40,34 @@
  *     OTHER DEALINGS IN THE SOFTWARE.
  */
 
+&i2c1 {
+       stmpe811: gpio-expander@44 {
+               compatible = "st,stmpe811";
+               reg = <0x44>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_stmpe>;
+               interrupt-parent = <&gpio1>;
+               interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
+               interrupt-controller;
+               #interrupt-cells = <2>;
+
+               stmpe: touchscreen {
+                       compatible = "st,stmpe-ts";
+                       st,sample-time = <4>;
+                       st,mod-12b = <1>;
+                       st,ref-sel = <0>;
+                       st,adc-freq = <1>;
+                       st,ave-ctrl = <1>;
+                       st,touch-det-delay = <2>;
+                       st,settling = <2>;
+                       st,fraction-z = <7>;
+                       st,i-drive = <1>;
+               };
+       };
+};
+
 &lcdif {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_lcdif_dat
@@ -104,4 +132,10 @@
                        MX6UL_PAD_LCD_DATA17__LCDIF_DATA17  0x79
                >;
        };
+
+       pinctrl_stmpe: stmpegrp  {
+               fsl,pins = <
+                       MX6UL_PAD_UART1_CTS_B__GPIO1_IO18 0x1b0b0
+               >;
+       };
 };