Input: tsc2005 - add DT support

This adds DT support to the tsc2005 touchscreen driver. It also adds
regulator support to the driver if booted via DT.

Reviewed-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
new file mode 100644
index 000000000000..4b641c7bf1c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
@@ -0,0 +1,42 @@
+* Texas Instruments tsc2005 touchscreen controller
+
+Required properties:
+ - compatible                 : "ti,tsc2005"
+ - reg                        : SPI device address
+ - spi-max-frequency          : Maximal SPI speed
+ - interrupts                 : IRQ specifier
+ - reset-gpios                : GPIO specifier
+ - vio-supply                 : Regulator specifier
+
+Optional properties:
+ - ti,x-plate-ohms            : integer, resistance of the touchscreen's X plates
+                                in ohm (defaults to 280)
+ - ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
+                                the configured time (in milli seconds), the driver
+                                will reset it. This is disabled by default.
+ - properties defined in touchscreen.txt
+
+Example:
+
+&mcspi1 {
+        tsc2005@0 {
+                compatible = "ti,tsc2005";
+                spi-max-frequency = <6000000>;
+                reg = <0>;
+
+                vio-supply = <&vio>;
+
+                reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>; /* 104 */
+                interrupts-extended = <&gpio4 4 IRQ_TYPE_EDGE_RISING>; /* 100 */
+
+                touchscreen-fuzz-x = <4>;
+                touchscreen-fuzz-y = <7>;
+                touchscreen-fuzz-pressure = <2>;
+                touchscreen-max-x = <4096>;
+                touchscreen-max-y = <4096>;
+                touchscreen-max-pressure = <2048>;
+
+                ti,x-plate-ohms = <280>;
+                ti,esd-recovery-timeout-ms = <8000>;
+        };
+}