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authorMax Krummenacher <max.krummenacher@toradex.com>2019-05-23 19:16:27 +0200
committerMax Krummenacher <max.krummenacher@toradex.com>2019-05-23 20:09:24 +0200
commitd65d0cdff3f30621ad258442230b3e8a460ecc7e (patch)
tree52dd9e2aef916614cb501b906daa7c13ab83d819
parentbf8bd47a50e853f5cf6c34dbe6186853527714fc (diff)
Input: colbri-vf50-ts: improve bindings documentation
Clarify properties. Drop unused pinctrl-2 state 'gpio'. Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
-rw-r--r--Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt16
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt b/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt
index df531b5b6a0d..8350510231eb 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt
@@ -3,16 +3,17 @@
Required Properties:
- compatible must be toradex,vf50-touchscreen
- io-channels: adc channels being used by the Colibri VF50 module
+ IIO ADC for Y-, X-, Y+, X+ connections
- xp-gpios: FET gate driver for input of X+
- xm-gpios: FET gate driver for input of X-
- yp-gpios: FET gate driver for input of Y+
- ym-gpios: FET gate driver for input of Y-
- interrupt-parent: phandle for the interrupt controller
-- interrupts: pen irq interrupt for touch detection
-- pinctrl-names: "idle", "default", "gpios"
-- pinctrl-0: pinctrl node for pen/touch detection state pinmux
+- interrupts: pen irq interrupt for touch detection, signal from X plate
+- pinctrl-names: "idle", "default"
+- pinctrl-0: pinctrl node for pen/touch detection, pinctrl must provide
+ pull-up resistor on X+, X-.
- pinctrl-1: pinctrl node for X/Y and pressure measurement (ADC) state pinmux
-- pinctrl-2: pinctrl node for gpios functioning as FET gate drivers
- vf50-ts-min-pressure: pressure level at which to stop measuring X/Y values
Example:
@@ -20,7 +21,7 @@ Example:
touchctrl: vf50_touchctrl {
compatible = "toradex,vf50-touchscreen";
io-channels = <&adc1 0>,<&adc0 0>,
- <&adc0 1>,<&adc1 2>;
+ <&adc0 1>,<&adc1 2>;
xp-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
xm-gpios = <&gpio2 29 GPIO_ACTIVE_HIGH>;
yp-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
@@ -28,8 +29,7 @@ Example:
interrupt-parent = <&gpio0>;
interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "idle","default","gpios";
- pinctrl-0 = <&pinctrl_touchctrl_idle>;
- pinctrl-1 = <&pinctrl_touchctrl_default>;
- pinctrl-2 = <&pinctrl_touchctrl_gpios>;
+ pinctrl-0 = <&pinctrl_touchctrl_idle>, <&pinctrl_touchctrl_gpios> ;
+ pinctrl-1 = <&pinctrl_touchctrl_default>, <&pinctrl_touchctrl_gpios>;
vf50-ts-min-pressure = <200>;
};