linux-kernel - Re: [PATCH net-next 04/12] net: pcs: add Renesas MII converter driver

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Date:   Wed, 20 Apr 2022 15:25:39 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Clément Léger <clement.leger@...tlin.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Herve Codina <herve.codina@...tlin.com>,
        Miquèl Raynal <miquel.raynal@...tlin.com>,
        Milan Stevanovic <milan.stevanovic@...com>,
        Jimmy Lalande <jimmy.lalande@...com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 04/12] net: pcs: add Renesas MII converter driver

Hi Clément,

Thanks for your patch!
Only cosmetic comments from me, as I'm not too familiar with MII.

On Thu, Apr 14, 2022 at 2:24 PM Clément Léger <clement.leger@...tlin.com> wrote:
> Add PCS driver for the MII converter that is present on Renesas RZ/N1

Add a ... on the ...

> SoC. This MII converter is reponsible of converting MII to RMII/RGMII

responsible for

> or act as a MII passtrough. Exposing it as a PCS allows to reuse it

pass-through

> in both the switch driver and the stmmac driver. Currently, this driver
> only allows the PCS to be used by the dual Cortex-A7 subsystem since
> the register locking system is not used.
>
> Signed-off-by: Clément Léger <clement.leger@...tlin.com>

> --- a/drivers/net/pcs/Kconfig
> +++ b/drivers/net/pcs/Kconfig
> @@ -18,4 +18,11 @@ config PCS_LYNX
>           This module provides helpers to phylink for managing the Lynx PCS
>           which is part of the Layerscape and QorIQ Ethernet SERDES.
>
> +config PCS_RZN1_MIIC
> +       tristate "Renesas RZN1 MII converter"

RZ/N1

> +       help
> +         This module provides a driver for the MII converter that is available
> +         on RZN1 SoC. This PCS convert MII to RMII/RGMII or can be in

RZ/N1

> +         passthrough mode for MII.
> +
>  endmenu

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds