linux-kernel - Re: [PATCH v2] ARM: dts: am335x-bone: switch to new cpsw switch drv

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Message-ID: <20210805185814.2505a3ad.paul.barker@sancloud.com>
Date:   Thu, 5 Aug 2021 18:58:14 +0100
From:   Paul Barker <paul.barker@...cloud.com>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     Tony Lindgren <tony@...mide.com>, <linux-omap@...r.kernel.org>,
        Lokesh Vutla <lokeshvutla@...com>,
        <linux-kernel@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>
Subject: Re: [PATCH v2] ARM: dts: am335x-bone: switch to new cpsw switch drv

On Thu, 5 Aug 2021 20:29:54 +0300
Grygorii Strashko <grygorii.strashko@...com> wrote:

> The dual_mac mode has been preserved the same way between legacy and new
> driver, and one port devices works the same as 1 dual_mac port - it's safe
> to switch drivers.
> 
> So, Switch BeagleBone boards to use new cpsw switch driver. Those boards
> have or 2 Ext. port wired and configured in dual_mac mode by default, or
> only 1 Ext. port.
> 
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> ---
> v2: only rebase
> 
>  arch/arm/boot/dts/am335x-bone-common.dtsi     | 13 +++++---
>  .../boot/dts/am335x-boneblack-wireless.dts    |  2 +-
>  .../boot/dts/am335x-bonegreen-wireless.dts    |  2 +-
>  .../boot/dts/am335x-sancloud-bbe-common.dtsi  | 33 ++-----------------
>  4 files changed, 12 insertions(+), 38 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi
> index 34a0045b5f65..0ccdc7cd463b 100644
> --- a/arch/arm/boot/dts/am335x-bone-common.dtsi
> +++ b/arch/arm/boot/dts/am335x-bone-common.dtsi
> @@ -353,24 +353,27 @@
>  	};
>  };
>  
> -&cpsw_emac0 {
> +&cpsw_port1 {
>  	phy-handle = <&ethphy0>;
>  	phy-mode = "mii";
> +	ti,dual-emac-pvid = <1>;
>  };
>  
> -&mac {
> -	slaves = <1>;
> +&cpsw_port2 {
> +	status = "disabled";
> +};
> +
> +&mac_sw {
>  	pinctrl-names = "default", "sleep";
>  	pinctrl-0 = <&cpsw_default>;
>  	pinctrl-1 = <&cpsw_sleep>;
>  	status = "okay";
>  };
>  
> -&davinci_mdio {
> +&davinci_mdio_sw {
>  	pinctrl-names = "default", "sleep";
>  	pinctrl-0 = <&davinci_mdio_default>;
>  	pinctrl-1 = <&davinci_mdio_sleep>;
> -	status = "okay";
>  
>  	ethphy0: ethernet-phy@0 {
>  		reg = <0>;
> diff --git a/arch/arm/boot/dts/am335x-boneblack-wireless.dts b/arch/arm/boot/dts/am335x-boneblack-wireless.dts
> index 8b2b24c80670..c72b09ab8da0 100644
> --- a/arch/arm/boot/dts/am335x-boneblack-wireless.dts
> +++ b/arch/arm/boot/dts/am335x-boneblack-wireless.dts
> @@ -63,7 +63,7 @@
>  	};
>  };
>  
> -&mac {
> +&mac_sw {
>  	status = "disabled";
>  };
>  
> diff --git a/arch/arm/boot/dts/am335x-bonegreen-wireless.dts b/arch/arm/boot/dts/am335x-bonegreen-wireless.dts
> index 74db0fc39397..215f279e476b 100644
> --- a/arch/arm/boot/dts/am335x-bonegreen-wireless.dts
> +++ b/arch/arm/boot/dts/am335x-bonegreen-wireless.dts
> @@ -62,7 +62,7 @@
>  	};
>  };
>  
> -&mac {
> +&mac_sw {
>  	status = "disabled";
>  };
>  
> diff --git a/arch/arm/boot/dts/am335x-sancloud-bbe-common.dtsi b/arch/arm/boot/dts/am335x-sancloud-bbe-common.dtsi
> index bd9c21813192..2513d7cde09c 100644
> --- a/arch/arm/boot/dts/am335x-sancloud-bbe-common.dtsi
> +++ b/arch/arm/boot/dts/am335x-sancloud-bbe-common.dtsi
> @@ -40,22 +40,6 @@
>  		>;  
>  	};
>  
> -	davinci_mdio_default: davinci_mdio_default {
> -		pinctrl-single,pins = <
> -			/* MDIO */
> -			AM33XX_PADCONF(AM335X_PIN_MDIO, PIN_INPUT_PULLUP | SLEWCTRL_FAST, MUX_MODE0)
> -			AM33XX_PADCONF(AM335X_PIN_MDC, PIN_OUTPUT_PULLUP, MUX_MODE0)
> -		>;  
> -	};
> -
> -	davinci_mdio_sleep: davinci_mdio_sleep {
> -		pinctrl-single,pins = <
> -			/* MDIO reset value */
> -			AM33XX_PADCONF(AM335X_PIN_MDIO, PIN_INPUT_PULLDOWN, MUX_MODE7)
> -			AM33XX_PADCONF(AM335X_PIN_MDC, PIN_INPUT_PULLDOWN, MUX_MODE7)
> -		>;  
> -	};
> -

The commit message doesn't mention anything about why these are
dropped. I guess it's to remove duplication since
am335x-bone-common.dtsi already has the necessary elements. It'd be
good to clarify this in the commit message though.

>  	usb_hub_ctrl: usb_hub_ctrl {
>  		pinctrl-single,pins = <
>  			AM33XX_PADCONF(AM335X_PIN_RMII1_REF_CLK, PIN_OUTPUT_PULLUP, MUX_MODE7)     /* rmii1_refclk.gpio0_29 */
> @@ -63,25 +47,12 @@
>  	};
>  };
>  
> -&mac {
> -	pinctrl-names = "default", "sleep";
> +&mac_sw {
>  	pinctrl-0 = <&cpsw_default>;
>  	pinctrl-1 = <&cpsw_sleep>;
> -	status = "okay";
> -};
> -
> -&davinci_mdio {
> -	pinctrl-names = "default", "sleep";
> -	pinctrl-0 = <&davinci_mdio_default>;
> -	pinctrl-1 = <&davinci_mdio_sleep>;
> -	status = "okay";
> -
> -	ethphy0: ethernet-phy@0 {
> -		reg = <0>;
> -	};

As above, it'd be good to clarify in the commit message why these
entries are removed.

>  };
>  
> -&cpsw_emac0 {
> +&cpsw_port1 {
>  	phy-handle = <&ethphy0>;

Can we drop phy-handle here? It's set to the same value in
am335x-bone-common.dtsi.

>  	phy-mode = "rgmii-id";
>  };

Thanks,

-- 
Paul Barker
Principal Software Engineer
SanCloud Ltd

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