linux-kernel - Re: [PATCH v12 net-next 2/9] net: mdio: mscc-miim: add ability to be used in a non-mmio configuration

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Date:   Fri, 1 Jul 2022 22:24:46 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Colin Foster <colin.foster@...advantage.com>
Cc:     devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Wolfram Sang <wsa@...nel.org>,
        Terry Bowman <terry.bowman@....com>,
        katie.morris@...advantage.com
Subject: Re: [PATCH v12 net-next 2/9] net: mdio: mscc-miim: add ability to be
 used in a non-mmio configuration

On Fri, Jul 1, 2022 at 9:26 PM Colin Foster
<colin.foster@...advantage.com> wrote:
>
> There are a few Ocelot chips that contain the logic for this bus, but are
> controlled externally. Specifically the VSC7511, 7512, 7513, and 7514. In
> the externally controlled configurations these registers are not
> memory-mapped.
>
> Add support for these non-memory-mapped configurations.

...

> +       phy_regmap = ocelot_regmap_from_resource_optional(pdev, 1,
> +                                                &mscc_miim_phy_regmap_config);
> +       if (IS_ERR(phy_regmap)) {
> +               dev_err(dev, "Unable to create phy register regmap\n");
> +               return PTR_ERR(phy_regmap);

return dev_err_probe(...); ?

>         }

-- 
With Best Regards,
Andy Shevchenko