[PATCH v1 2/2] dt-bindings: input: colibri-vf50-ts: Improve documentation

Francesco Dolcini
2022-07-12T10:16:33Z

From: Max Krummenacher <max.krummenacher@toradex.com>

Clarify properties definition, drop unused pinctrl-2 state 'gpio'.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
.../input/touchscreen/colibri-vf50-ts.txt | 16 ++++++++--------
1 file 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 2e1490a8fe74..ca304357c374 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt
@@ -3,15 +3,16 @@
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-
-- 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:
@@ -26,9 +27,8 @@ Example:
ym-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
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-names = "idle","default";
+ pinctrl-0 = <&pinctrl_touchctrl_idle>, <&pinctrl_touchctrl_gpios>;
+ pinctrl-1 = <&pinctrl_touchctrl_default>, <&pinctrl_touchctrl_gpios>;
vf50-ts-min-pressure = <200>;
};
--
2.25.1