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Date: Fri, 26 Jan 2024 17:52:12 +0100
From: Johan Hovold <johan@kernel.org>
To: Bjorn Andersson <quic_bjorande@quicinc.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Benjamin Tissoires <benjamin.tissoires@redhat.com>,
	Jiri Kosina <jikos@kernel.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Johan Hovold <johan+linaro@kernel.org>,
	linux-arm-msm@vger.kernel.org, linux-input@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	Konrad Dybcio <konrad.dybcio@somainline.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: HID: i2c-hid: Document reset-related
 properties
Message-ID: <ZbPjPAyNnIurX4X5@hovoldconsulting.com>
References: <20240126-x13s-touchscreen-v2-0-5374ccc9e10d@quicinc.com>
 <20240126-x13s-touchscreen-v2-1-5374ccc9e10d@quicinc.com>
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In-Reply-To: <20240126-x13s-touchscreen-v2-1-5374ccc9e10d@quicinc.com>

On Fri, Jan 26, 2024 at 08:41:38AM -0800, Bjorn Andersson wrote:
> 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.
> 
> Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.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.

You forgot to remove the now obsolete comment from the HID driver that I
mentioned.

> +
> +  reset-gpios: true
> +
>    touchscreen-inverted-x: true
>  
>    touchscreen-inverted-y: true

Reviewed-by: Johan Hovold <johan+linaro@kernel.org>