netdev - Re: [net-next: PATCH v2 4/7] net: mvmdio: simplify clock handling

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Message-ID: <CAPv3WKdo_JeMRL-GtkYv7G3MUnXmyG_oJtA+=WY72-J_0jokRA@mail.gmail.com>
Date:   Thu, 17 Jun 2021 01:25:38 +0200
From:   Marcin Wojtas <mw@...ihalf.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Grzegorz Jaszczyk <jaz@...ihalf.com>,
        Grzegorz Bernacki <gjb@...ihalf.com>, upstream@...ihalf.com,
        Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@....com>,
        Jon Nettleton <jon@...id-run.com>,
        Tomasz Nowicki <tn@...ihalf.com>, rjw@...ysocki.net,
        lenb@...nel.org, Andy Shevchenko <andy.shevchenko@...il.com>
Subject: Re: [net-next: PATCH v2 4/7] net: mvmdio: simplify clock handling

śr., 16 cze 2021 o 21:48 Andrew Lunn <andrew@...n.ch> napisał(a):
>
> > +     dev->clks[0].id = "core";
> > +     dev->clks[1].id = "mg";
> > +     dev->clks[2].id = "mg_core";
> > +     dev->clks[3].id = "axi";
> > +     ret = devm_clk_bulk_get_optional(&pdev->dev, MVMDIO_CLOCK_COUNT,
> > +                                      dev->clks);
>
> Kirkwood:
>
>                 mdio: mdio-bus@...04 {
>                         compatible = "marvell,orion-mdio";
>                         #address-cells = <1>;
>                         #size-cells = <0>;
>                         reg = <0x72004 0x84>;
>                         interrupts = <46>;
>                         clocks = <&gate_clk 0>;
>                         status = "disabled";
>
> Does this work? There is no clock-names in DT.
>

Neither are the clocks in Armada 7k8k / CN913x:

                CP11X_LABEL(mdio): mdio@...200 {
                        #address-cells = <1>;
                        #size-cells = <0>;
                        compatible = "marvell,orion-mdio";
                        reg = <0x12a200 0x10>;
                        clocks = <&CP11X_LABEL(clk) 1 9>,
<&CP11X_LABEL(clk) 1 5>,
                                 <&CP11X_LABEL(clk) 1 6>,
<&CP11X_LABEL(clk) 1 18>;
                        status = "disabled";
                };

Apparently I misread the code and got convinced that contrary to
devm_clk_get_optional(), the devm_clk_get_bulk_optional() obtains the
clocks directly by index, not name (on the tested boards, the same
clocks are enabled by the other interfaces, so the problems

I will drop this patch. Thank you for spotting the issue.

Best regards,
Marcin