linux-kernel - Re: [PATCH 01/13] ARM: dts: qcom: add multiple missing pin definition for ipq8064

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Date:   Wed, 6 Jul 2022 14:48:08 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Christian Marangi <ansuelsmth@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Jonathan McDowell <noodles@...th.li>
Subject: Re: [PATCH 01/13] ARM: dts: qcom: add multiple missing pin definition
 for ipq8064



On 5.07.2022 15:39, Christian Marangi wrote:
> Add missing definition for mdio0 pins used for gpio-bitbang driver,i2c4
> pins and rgmii2 pins for ipq8064.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> Tested-by: Jonathan McDowell <noodles@...th.li>
> ---
>  arch/arm/boot/dts/qcom-ipq8064.dtsi | 34 +++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/qcom-ipq8064.dtsi b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> index 4b475d98343c..f06a17bd915a 100644
> --- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
> +++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> @@ -382,6 +382,15 @@ mux {
>  				};
>  			};
>  
Hi,
> +			i2c4_pins: i2c4_pinmux {
No underscores in node names (use them only in labels), please.

Also, please rename this to something like i2c4-default, for
example to make it clear which power state it represents (I 
suppose i2c4-sleep is going to appear sometime in the as well).


> +				mux {

Please drop the unnecessary mux{} level.

Konrad
> +					pins = "gpio12", "gpio13";
> +					function = "gsbi4";
> +					drive-strength = <12>;
> +					bias-disable;
> +				};
> +			};
> +
>  			spi_pins: spi_pins {
>  				mux {
>  					pins = "gpio18", "gpio19", "gpio21";
> @@ -424,6 +433,8 @@ mux {
>  
>  				pullups {
>  					pins = "gpio39";
> +					function = "nand";
> +					drive-strength = <10>;
>  					bias-pull-up;
>  				};
>  
> @@ -431,9 +442,32 @@ hold {
>  					pins = "gpio40", "gpio41", "gpio42",
>  					       "gpio43", "gpio44", "gpio45",
>  					       "gpio46", "gpio47";
> +					function = "nand";
> +					drive-strength = <10>;
>  					bias-bus-hold;
>  				};
>  			};
> +
> +			mdio0_pins: mdio0_pins {
> +				mux {
> +					pins = "gpio0", "gpio1";
> +					function = "mdio";
> +					drive-strength = <8>;
> +					bias-disable;
> +				};
> +			};
> +
> +			rgmii2_pins: rgmii2_pins {
> +				mux {
> +					pins = "gpio27", "gpio28", "gpio29",
> +					       "gpio30", "gpio31", "gpio32",
> +					       "gpio51", "gpio52", "gpio59",
> +					       "gpio60", "gpio61", "gpio62";
> +					function = "rgmii2";
> +					drive-strength = <8>;
> +					bias-disable;
> +				};
> +			};
>  		};
>  
>  		intc: interrupt-controller@...0000 {