[PATCH] ARM: dts: at91: sama7g5ek: disable slew rate for GMACs non MDIO pins

[Eugen.Hristev at microchip.com]

On 1/28/22 1:10 PM, Codrin Ciubotariu wrote:
> Non GMAC's MDIO pins should have slew rate disabled for R(G)MII modes. Set
> them accordingly in DT.
> 
> Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu at microchip.com>
> ---

Tested-by: Eugen Hristev <eugen.hristev at microchip.com>

>   arch/arm/dts/sama7g5ek.dts | 25 +++++++++++++++++++------
>   1 file changed, 19 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm/dts/sama7g5ek.dts b/arch/arm/dts/sama7g5ek.dts
> index 6adb044258..ac6f23f64e 100644
> --- a/arch/arm/dts/sama7g5ek.dts
> +++ b/arch/arm/dts/sama7g5ek.dts
> @@ -125,7 +125,9 @@
>   	#address-cells = <1>;
>   	#size-cells = <0>;
>   	pinctrl-names = "default";
> -	pinctrl-0 = <&pinctrl_gmac0_default &pinctrl_gmac0_txc_default>;
> +	pinctrl-0 = <&pinctrl_gmac0_default
> +		     &pinctrl_gmac0_mdio_default
> +		     &pinctrl_gmac0_txc_default>;
>   	phy-mode = "rgmii-id";
>   	status = "okay";
>   
> @@ -138,7 +140,7 @@
>   	#address-cells = <1>;
>   	#size-cells = <0>;
>   	pinctrl-names = "default";
> -	pinctrl-0 = <&pinctrl_gmac1_default>;
> +	pinctrl-0 = <&pinctrl_gmac1_default &pinctrl_gmac1_mdio_default>;
>   	phy-mode = "rmii";
>   	status = "okay";
>   
> @@ -235,14 +237,20 @@
>   			 <PIN_PA15__G0_TXEN>,
>   			 <PIN_PA30__G0_RXCK>,
>   			 <PIN_PA18__G0_RXDV>,
> -			 <PIN_PA22__G0_MDC>,
> -			 <PIN_PA23__G0_MDIO>,
>   			 <PIN_PA25__G0_125CK>;
> +		slew-rate = <0>;
> +		bias-disable;
> +	};
> +
> +	pinctrl_gmac0_mdio_default: gmac0_mdio_default {
> +		pinmux = <PIN_PA22__G0_MDC>,
> +			 <PIN_PA23__G0_MDIO>;
>   		bias-disable;
>   	};
>   
>   	pinctrl_gmac0_txc_default: gmac0_txc_default {
>   		pinmux = <PIN_PA24__G0_TXCK>;
> +		slew-rate = <0>;
>   		bias-pull-up;
>   	};
>   
> @@ -254,8 +262,13 @@
>   			 <PIN_PD25__G1_RX0>,
>   			 <PIN_PD26__G1_RX1>,
>   			 <PIN_PD27__G1_RXER>,
> -			 <PIN_PD24__G1_RXDV>,
> -			 <PIN_PD28__G1_MDC>,
> +			 <PIN_PD24__G1_RXDV>;
> +		slew-rate = <0>;
> +		bias-disable;
> +	};
> +
> +	pinctrl_gmac1_mdio_default: gmac1_mdio_default {
> +		pinmux = <PIN_PD28__G1_MDC>,
>   			 <PIN_PD29__G1_MDIO>;
>   		bias-disable;
>   	};
>