linux-kernel - Re: [PATCH 4/6] arm64: dts: qcom: msm8976: Declare and use SDC1 pins

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Date:   Fri, 16 Dec 2022 01:16:37 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Marijn Suijten <marijn.suijten@...ainline.org>,
        phone-devel@...r.kernel.org,
        Bjorn Andersson <andersson@...nel.org>,
        ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Luca Weiss <luca@...tu.xyz>,
        Adam Skladowski <a39.skl@...il.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/6] arm64: dts: qcom: msm8976: Declare and use SDC1 pins



On 15.12.2022 22:02, Marijn Suijten wrote:
> On 2022-12-15 22:00:12, Marijn Suijten wrote:
>> On 2022-12-15 14:19:41, Konrad Dybcio wrote:
>>>
>>>
>>> On 15.12.2022 00:20, Marijn Suijten wrote:
>>>> Add the pinctrl states for SDC1 and use them on sdhc_1.
>>>>
>>>> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
>>>> ---
>>>>  arch/arm64/boot/dts/qcom/msm8976.dtsi | 55 +++++++++++++++++++++++++++
>>>>  1 file changed, 55 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/msm8976.dtsi b/arch/arm64/boot/dts/qcom/msm8976.dtsi
>>>> index 05dcb30b0779..7d4c7548882c 100644
>>>> --- a/arch/arm64/boot/dts/qcom/msm8976.dtsi
>>>> +++ b/arch/arm64/boot/dts/qcom/msm8976.dtsi
>>>> @@ -508,6 +508,56 @@ tlmm: pinctrl@...0000 {
>>>>  			interrupt-controller;
>>>>  			#interrupt-cells = <2>;
>>>>  
>>>> +			sdc1_off_state: sdc1-off-state {
>>>> +				clk-pins {
>>>> +					pins = "sdc1_clk";
>>>> +					drive-strength = <2>;
>>>> +					bias-disable;
>>>> +				};
>>>> +
>>>> +				cmd-pins {
>>>> +					pins = "sdc1_cmd";
>>>> +					drive-strength = <2>;
>>>> +					bias-pull-up;
>>>> +				};
>>>> +
>>>> +				data-pins {
>>>> +					pins = "sdc1_data";
>>>> +					drive-strength = <2>;
>>>> +					bias-pull-up;
>>>> +				};
>>>> +
>>>> +				rclk-pins {
>>>> +					pins = "sdc1_rclk";
>>>> +					bias-pull-down;
>>>> +				};
>>>> +			};
>>>> +
>>>> +			sdc1_on_state: sdc1-on-state {
>>>> +				clk-pins {
>>>> +					pins = "sdc1_clk";
>>>> +					drive-strength = <16>;
>>>> +					bias-disable;
>>>> +				};
>>>> +
>>>> +				cmd-pins {
>>>> +					pins = "sdc1_cmd";
>>>> +					drive-strength = <10>;
>>>> +					bias-pull-up;
>>>> +				};
>>>> +
>>>> +				data-pins {
>>>> +					pins = "sdc1_data";
>>>> +					drive-strength = <10>;
>>>> +					bias-pull-up;
>>>> +				};
>>>> +
>>>> +				rclk-pins {
>>>> +					pins = "sdc1_rclk";
>>>> +					bias-pull-down;
>>>> +				};
>>>> +			};
>>>> +
>>>>  			spi1_default: spi0-default-state {
>>>>  				spi-pins {
>>>>  					pins = "gpio0", "gpio1", "gpio3";
>>>> @@ -680,6 +730,11 @@ sdhc_1: mmc@...4000 {
>>>>  				 <&gcc GCC_SDCC1_APPS_CLK>,
>>>>  				 <&rpmcc RPM_SMD_XO_CLK_SRC>;
>>>>  			clock-names = "iface", "core", "xo";
>>>> +
>>>> +			pinctrl-0 = <&sdc1_on_state>;
>>>> +			pinctrl-1 = <&sdc1_off_state>;
>>>> +			pinctrl-names = "default", "sleep";
>>> pinctrl-names usually goes before pinctrl-N
>>
>> I thought I had seen them _after_ nowadays, same for reg-names,
>> phy-names, interrupt-names and clock-names.  What is it?
>>
>> Regardless, I'd rather keep this consistent across this file (sdc2 also
>> has it after, same for other *-names)
> 
> Excuse me, I was looking at sm6125 DT while writing this, sdc2 for
> msm8976 is introduced _and used by sdhc_2 in a followup patch.
> 
> The other points still stand though, everything has -names last.
Hm, that's a good point, perhaps we should apply it to pinctrl-
too then. I like this.

Konrad
> 
> - Marijn
> 
>> and correct it at once in a
>> separate patch, if someone really cares.
>>
>> But really, we should have a checker/autoformatter for these "rules",
>> instead of all this manual back-and-forth (is this order already set in
>> stone under Documentation/ or something?).
>>
>> - Marijn