linux-kernel - Re: [PATCH 1/6] ARM: dts: stm32: Add sdio pins definition for stm32f7

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Date:   Thu, 1 Mar 2018 10:51:01 +0100
From:   Alexandre Torgue <alexandre.torgue@...com>
To:     <patrice.chotard@...com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <linux@...linux.org.uk>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <lee.jones@...aro.org>
CC:     <mcoquelin.stm32@...il.com>
Subject: Re: [PATCH 1/6] ARM: dts: stm32: Add sdio pins definition for stm32f7

Hi Patrice

On 03/01/2018 10:43 AM, patrice.chotard@...com wrote:
> From: Patrice Chotard <patrice.chotard@...com>
> 
> Add sdio pins definition for the 2 sdio instances embeds in stm32f746.
> 
> Signed-off-by: Patrice Chotard <patrice.chotard@...com>
> ---
>   arch/arm/boot/dts/stm32f7-pinctrl.dtsi | 62 ++++++++++++++++++++++++++++++++++
>   1 file changed, 62 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/stm32f7-pinctrl.dtsi b/arch/arm/boot/dts/stm32f7-pinctrl.dtsi
> index f518de184e52..fb40f0835dd4 100644
> --- a/arch/arm/boot/dts/stm32f7-pinctrl.dtsi
> +++ b/arch/arm/boot/dts/stm32f7-pinctrl.dtsi
> @@ -222,6 +222,68 @@
>   					slew-rate = <2>;
>   				};
>   			};
> +
> +			sdio_pins: sdio_pins@0 {
> +				pins {
> +					pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1 D0 */
> +						 <STM32_PINMUX('C', 9, AF12)>, /* SDMMC1 D1 */
> +						 <STM32_PINMUX('C', 10, AF12)>, /* SDMMC1 D2 */
> +						 <STM32_PINMUX('C', 11, AF12)>, /* SDMMC1 D3 */
> +						 <STM32_PINMUX('C', 12, AF12)>, /* SDMMC1 CLK */
> +						 <STM32_PINMUX('D', 2, AF12)>; /* SDMMC1 CMD */
> +					drive-push-pull;
> +					slew-rate = <2>;
> +				};
> +			};

if you have 2 pins groups, please use '_a' for the first one. You could 
have something like:

sdio_pins_a
sdio_od_pins_a

and

sdio_pins_b
sdio_od_pins_b

> +			sdio_pins_od: sdio_pins_od@0 {
> +				pins1 {
> +					pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1 D0 */
> +						 <STM32_PINMUX('C', 9, AF12)>, /* SDMMC1 D1 */
> +						 <STM32_PINMUX('C', 10, AF12)>, /* SDMMC1 D2 */
> +						 <STM32_PINMUX('C', 11, AF12)>, /* SDMMC1 D3 */
> +						 <STM32_PINMUX('C', 12, AF12)>; /* SDMMC1 CLK */
> +					drive-push-pull;
> +					slew-rate = <2>;
> +				};
> +
> +				pins2 {
> +					pinmux = <STM32_PINMUX('D', 2, AF12)>; /* SDMMC1 CMD */
> +					drive-open-drain;
> +					slew-rate = <2>;
> +				};
> +			};
> +
> +			sdio_pins_b: sdio_pins_b@0 {
> +				pins {
> +					pinmux = <STM32_PINMUX('G', 9, AF11)>, /* SDMMC2 D0 */
> +						 <STM32_PINMUX('G', 10, AF11)>, /* SDMMC2 D1 */
> +						 <STM32_PINMUX('B', 3, AF10)>, /* SDMMC2 D2 */
> +						 <STM32_PINMUX('B', 4, AF10)>, /* SDMMC2 D3 */
> +						 <STM32_PINMUX('D', 6, AF11)>, /* SDMMC2 CLK */
> +						 <STM32_PINMUX('D', 7, AF11)>; /* SDMMC2 CMD */
> +					drive-push-pull;
> +					slew-rate = <2>;
> +				};
> +			};
> +
> +			sdio_pins_od_b: sdio_pins_od_b@0 {
> +				pins1 {
> +					pinmux = <STM32_PINMUX('G', 9, AF11)>, /* SDMMC2 D0 */
> +						 <STM32_PINMUX('G', 10, AF11)>, /* SDMMC2 D1 */
> +						 <STM32_PINMUX('B', 3, AF10)>, /* SDMMC2 D2 */
> +						 <STM32_PINMUX('B', 4, AF10)>, /* SDMMC2 D3 */
> +						 <STM32_PINMUX('D', 6, AF11)>; /* SDMMC2 CLK */
> +					drive-push-pull;
> +					slew-rate = <2>;
> +				};
> +
> +				pins2 {
> +					pinmux = <STM32_PINMUX('D', 7, AF11)>; /* SDMMC2 CMD */
> +					drive-open-drain;
> +					slew-rate = <2>;
> +				};
> +			};
>   		};
>   	};
>   };
>