linux-kernel - Re: [PATCH v2 4/6] arm64: dts: qcom: sc8280xp: Add reference device

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Message-ID: <b2c9faf0-95a8-772f-c211-f1599b35f8f8@linaro.org>
Date:   Wed, 22 Jun 2022 16:48:17 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Johan Hovold <johan@...nel.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Jassi Brar <jassisinghbrar@...il.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/6] arm64: dts: qcom: sc8280xp: Add reference device

On 22/06/2022 16:36, Konrad Dybcio wrote:
> 
> 
> On 22.06.2022 15:43, Johan Hovold wrote:
>> On Wed, Jun 22, 2022 at 02:33:02PM +0200, Konrad Dybcio wrote:
>>> On 22.06.2022 06:12, Bjorn Andersson wrote:
>>
>>>> +&qup2_i2c5 {
>>>> +	clock-frequency = <400000>;
>>>> +
>>>> +	pinctrl-names = "default";
>>>> +	pinctrl-0 = <&qup2_i2c5_default>, <&kybd_default>, <&tpad_default>;
>>>> +
>>>> +	status = "okay";
>>>> +
>>> I think all device DTs generally have 'status = "okay"' at the beginning. Should we change that?
>>>
>>
>> No, quite the opposite, status go at the end.
> Then all other device DTs should be updated, as in dts/qcom/
> everybody keeps it first in non-SoC/PMIC files.

The word "should" is a bit too much here, but I agree, we can update all
of them to match one, chosen approach.

However the location for "status" property is more important for the
definition of nodes in DTSI, because it's the least important piece
there and also kind of expected - here go properties + I disable it. For
me this is more important.

For node redefinition in DTS, I see benefits in two approaches:
1. Let me first enable the node and then configure it.
2. Let me configure the node and enable it.

Best regards,
Krzysztof