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authorGao Pan <pandy.gao@nxp.com>2017-03-16 16:31:56 +0800
committerLeonard Crestez <leonard.crestez@nxp.com>2018-08-24 12:41:33 +0300
commitc5f5a64314fda9d46efe919522de54dd0559ebd7 (patch)
tree68b41e7c0d123c0ca8ce1a45263ef15baff45c1b /Documentation
parente04e96cd7abf06f8e6af5efb0b29aafaccb711ed (diff)
MLK-14392-1 input: touch: add focaltech touch screen support
add focaltech touch screen support Signed-off-by: Gao Pan <pandy.gao@nxp.com> (cherry-pick from 595cefbee5586e77ceb9ad900c256177a98367c7)
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/input/touchscreen/focaltech-ts.txt46
1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/focaltech-ts.txt b/Documentation/devicetree/bindings/input/touchscreen/focaltech-ts.txt
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+FocalTech touch controller
+
+The focaltech controller is connected to host processor via i2c.
+The controller generates interrupts when the user touches the panel.
+The host controller is expected to read the touch coordinates over
+i2c and pass the coordinates to the rest of the system.
+
+Required properties:
+ - compatible : should be "focaltech,fts"
+ - reg : i2c slave address of the device, should be <0x38>
+ - interrupt-parent : parent of interrupt
+ - interrupts : irq gpio, "0x02" stands for that the irq triggered by falling edge.
+ - focaltech,irq-gpio : irq gpio, same as "interrupts" node.
+ - focaltech,reset-gpio : reset gpio
+ - focaltech,num-max-touches : maximum number of touches support
+ - focaltech,display-coords : display resolution in pixels. A four tuple consisting of minX, minY, maxX and maxY.
+
+Optional properties:
+ - focaltech,have-key : specify if virtual keys are supported
+ - focaltech,key-number : number of keys
+ - focaltech,keys : virtual key codes mapping to the coords
+ - focaltech,key-y-coord : constant y coordinate of keys, depends on the y resolution
+ - focaltech,key-x-coords : constant x coordinates of keys, depends on the x resolution
+ - focaltech,swap-xy : swap x-y coordinates
+
+
+Example:
+ i2c@f9927000 {
+ focaltech@38{
+ compatible = "focaltech,fts";
+ reg = <0x38>;
+ interrupt-parent = <&msm_gpio>;
+ interrupts = <13 0x02>;
+ focaltech,reset-gpio = <&msm_gpio 12 0x01>;
+ focaltech,irq-gpio = <&msm_gpio 13 0x02>;
+ focaltech,max-touch-number = <5>;
+ focaltech,display-coords = <0 0 1080 1920>;
+
+ focaltech,have-key;
+ focaltech,key-number = <3>;
+ focaltech,keys = <139 102 158>;
+ focaltech,key-y-coord = <2000>;
+ focaltech,key-x-coords = <200 600 800>;
+ focaltech,swap-xy;
+ };
+ };