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From:   Peter Geis <pgwipeout@gmail.com>
Date:   Sat, 9 Apr 2022 11:26:01 -0400
Message-ID: <CAMdYzYpK-RTf_8FVte2QLJawCKCjU6efgkRjsBj6quWGSSE6xA@mail.gmail.com>
Subject: Re: Re: Re: Re: [PATCH] arm64: dts: rockchip: Fix clocks for rk356x usb
To:     Frank Wunderlich <frank-w@public-files.de>
Cc:     Heiko Stuebner <heiko@sntech.de>, Dan Johansen <strit@manjaro.org>,
        Frank Wunderlich <linux@fw-web.de>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@lists.infradead.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzk+dt@kernel.org>,
        Michael Riesch <michael.riesch@wolfvision.net>,
        devicetree <devicetree@vger.kernel.org>,
        arm-mail-list <linux-arm-kernel@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Precedence: bulk

On Sat, Apr 9, 2022 at 7:56 AM Frank Wunderlich <frank-w@public-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.