linux-kernel - [PATCH v3 1/2] dt-bindings: HID: i2c-hid: Document reset-related properties

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Message-ID: <20240129-x13s-touchscreen-v3-1-c4a933034145@quicinc.com>
Date: Mon, 29 Jan 2024 08:47:47 -0800
From: Bjorn Andersson <quic_bjorande@...cinc.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring
	<robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Jiri Kosina
	<jikos@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konrad.dybcio@...aro.org>,
        Johan Hovold <johan+linaro@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-input@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Konrad Dybcio
	<konrad.dybcio@...ainline.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski@...aro.org>,
        Bjorn Andersson <quic_bjorande@...cinc.com>
Subject: [PATCH v3 1/2] dt-bindings: HID: i2c-hid: Document reset-related
 properties

Some I2C HID devices has a reset pin and requires that some specified
time elapses after this reset pin is deasserted, before communication
with the device is attempted.

The Linux implementation is looking for these in the "reset-gpios" and
"post-reset-deassert-delay-ms" properties already, so use these property
names.

Reviewed-by: Johan Hovold <johan+linaro@...nel.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
---
 Documentation/devicetree/bindings/input/hid-over-i2c.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.yaml b/Documentation/devicetree/bindings/input/hid-over-i2c.yaml
index 138caad96a29..f07ff4cb3d26 100644
--- a/Documentation/devicetree/bindings/input/hid-over-i2c.yaml
+++ b/Documentation/devicetree/bindings/input/hid-over-i2c.yaml
@@ -50,6 +50,12 @@ properties:
     description: Time required by the device after enabling its regulators
       or powering it on, before it is ready for communication.
 
+  post-reset-deassert-delay-ms:
+    description: Time required by the device after reset has been deasserted,
+      before it is ready for communication.
+
+  reset-gpios: true
+
   touchscreen-inverted-x: true
 
   touchscreen-inverted-y: true

-- 
2.25.1