Input: touchscreen - add imx6ul_tsc driver support

Freescale i.MX6UL contains a internal touchscreen controller,
this patch add a driver to support this controller.

Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt b/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt
new file mode 100644 (file)
index 0000000..853dff9
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt
@@ -0,0 +1,36 @@
+* Freescale i.MX6UL Touch Controller
+
+Required properties:
+- compatible: must be "fsl,imx6ul-tsc".
+- reg: this touch controller address and the ADC2 address.
+- interrupts: the interrupt of this touch controller and ADC2.
+- clocks: the root clock of touch controller and ADC2.
+- clock-names; must be "tsc" and "adc".
+- xnur-gpio: the X- gpio this controller connect to.
+  This xnur-gpio returns to low once the finger leave the touch screen (The
+  last touch event the touch controller capture).
+
+Optional properties:
+- measure-delay-time: the value of measure delay time.
+  Before X-axis or Y-axis measurement, the screen need some time before
+  even potential distribution ready.
+  This value depends on the touch screen.
+- pre-charge-time: the touch screen need some time to precharge.
+  This value depends on the touch screen.
+
+Example:
+       tsc: tsc@02040000 {
+               compatible = "fsl,imx6ul-tsc";
+               reg = <0x02040000 0x4000>, <0x0219c000 0x4000>;
+               interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
+                            <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
+               clocks = <&clks IMX6UL_CLK_IPG>,
+                        <&clks IMX6UL_CLK_ADC2>;
+               clock-names = "tsc", "adc";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_tsc>;
+               xnur-gpio = <&gpio1 3 GPIO_ACTIVE_LOW>;
+               measure-delay-time = <0xfff>;
+               pre-charge-time = <0xffff>;
+               status = "okay";
+       };

diff --cc drivers/input/touchscreen/Kconfig
Simple merge

diff --cc drivers/input/touchscreen/Makefile
Simple merge

diff --cc drivers/input/touchscreen/imx6ul_tsc.c
Simple merge