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Input: tsc2004 - add support for tsc2004

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This adds support for the i2c based tsc2004 touchscreen controller.

Signed-off-by: Michael Welling <mwelling@ieee.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Michael Welling 2015-11-02 22:54:23 -08:00 • committed by Dmitry Torokhov
parent ef3b98c2c3
commit a748941c95
4 changed files with 125 additions and 6 deletions
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34
Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
View file

@ -1,14 +1,15 @@
* Texas Instruments tsc2005 touchscreen controller
* Texas Instruments tsc2004 and tsc2005 touchscreen controllers
Required properties:
- compatible : "ti,tsc2005"
- reg : SPI device address
- spi-max-frequency : Maximal SPI speed
- compatible : "ti,tsc2004" or "ti,tsc2005"
- reg : Device address
- interrupts : IRQ specifier
- reset-gpios : GPIO specifier
- vio-supply : Regulator specifier
- spi-max-frequency : Maximum SPI clocking speed of the device
(for tsc2005)
Optional properties:
- vio-supply : Regulator specifier
- reset-gpios : GPIO specifier for the controller reset line
- 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
@ -18,6 +19,27 @@ Optional properties:
Example:
&i2c3 {
tsc2004@48 {
compatible = "ti,tsc2004";
reg = <0x48>;
vio-supply = <&vio>;
reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
touchscreen-fuzz-x = <4>;
touchscreen-fuzz-y = <7>;
touchscreen-fuzz-pressure = <2>;
touchscreen-size-x = <4096>;
touchscreen-size-y = <4096>;
touchscreen-max-pressure = <2048>;
ti,x-plate-ohms = <280>;
ti,esd-recovery-timeout-ms = <8000>;
};
}
&mcspi1 {
tsc2005@0 {
compatible = "ti,tsc2005";