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

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Message-ID: <20220712101619.326120-3-francesco.dolcini@toradex.com>
Date:   Tue, 12 Jul 2022 12:16:19 +0200
From:   Francesco Dolcini <francesco.dolcini@...adex.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC:     Max Krummenacher <max.krummenacher@...adex.com>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Francesco Dolcini <francesco.dolcini@...adex.com>
Subject: [PATCH v1 2/2] dt-bindings: input: colibri-vf50-ts: Improve documentation

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

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

Signed-off-by: Max Krummenacher <max.krummenacher@...adex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.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