linux-kernel - Re: [PATCH] arm64: dts: rockchip: Fix clocks for rk356x usb

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Message-ID: <10062144.nUPlyArG6x@phil>
Date:   Sun, 10 Apr 2022 18:53:17 +0200
From:   Heiko Stuebner <heiko@...ech.de>
To:     Frank Wunderlich <frank-w@...lic-files.de>,
        Peter Geis <pgwipeout@...il.com>
Cc:     Dan Johansen <strit@...jaro.org>,
        Frank Wunderlich <linux@...web.de>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Michael Riesch <michael.riesch@...fvision.net>,
        devicetree <devicetree@...r.kernel.org>,
        arm-mail-list <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: rockchip: Fix clocks for rk356x usb

Am Samstag, 9. April 2022, 17:26:01 CEST schrieb Peter Geis:
> On Sat, Apr 9, 2022 at 7:56 AM Frank Wunderlich <frank-w@...lic-files.de> wrote:
> >
> > Hi,
> >
> > so to not break the binding and other boards the right Patch should be like this
> >
> > +++ b/drivers/usb/dwc3/core.c
> > @@ -1691,17 +1691,17 @@ static int dwc3_probe(struct platform_device *pdev)
> >                  * Clocks are optional, but new DT platforms should support all
> >                  * clocks as required by the DT-binding.
> >                  */
> > -               dwc->bus_clk = devm_clk_get_optional(dev, "bus_early");
> > +               dwc->bus_clk = devm_clk_get_optional(dev, "bus_clk");
> >                 if (IS_ERR(dwc->bus_clk))
> >                         return dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
> >                                              "could not get bus clock\n");
> >
> > -               dwc->ref_clk = devm_clk_get_optional(dev, "ref");
> > +               dwc->ref_clk = devm_clk_get_optional(dev, "ref_clk");
> >                 if (IS_ERR(dwc->ref_clk))
> >                         return dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
> >                                              "could not get ref clock\n");
> >
> > -               dwc->susp_clk = devm_clk_get_optional(dev, "suspend");
> > +               dwc->susp_clk = devm_clk_get_optional(dev, "suspend_clk");
> >                 if (IS_ERR(dwc->susp_clk))
> >                         return dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
> >                                              "could not get suspend clock\n");
> >
> > but this needs fixing dts using the new clock names
> >
> > this is a link to the series moving from bulk_clk to named clocks:
> >
> > https://patchwork.kernel.org/project/linux-usb/patch/20220127200636.1456175-3-sean.anderson@seco.com/
> >
> > regards Frank
> 
> I've submitted a fix for the backwards compatibility issue.
> https://patchwork.kernel.org/project/linux-rockchip/patch/20220409152116.3834354-1-pgwipeout@gmail.com/
> 
> This fix is standalone and necessary no matter which route we decide
> to go with this series (and the rk3328/rk3399 support as well).
> With this patch, dwc3 is functional on the rk356x as the series was
> submitted, so if we decide to fix everything all at once, that is a
> viable option.

Thanks for doing that fix.

As the usb-dt-series is actually following the rockchip,dwc3 binding,
and "just" the driver does ignore it, I've now applied the usb series
and hope for a resolution of the general problem :-)


Heiko