linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: ipq8074: correct USB3 QMP PHY-s clock output names

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Date:   Sun, 8 Jan 2023 19:04:15 +0100
From:   Robert Marko <robimarko@...il.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        mturquette@...libre.com, sboyd@...nel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: qcom: ipq8074: correct USB3 QMP PHY-s
 clock output names

On Sun, 8 Jan 2023 at 18:32, Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
>
> On Sun, 8 Jan 2023 at 15:04, Robert Marko <robimarko@...il.com> wrote:
> >
> > It seems that clock-output-names for the USB3 QMP PHY-s where set without
> > actually checking what is the GCC clock driver expecting, so clock core
> > could never actually find the parents for usb0_pipe_clk_src and
> > usb1_pipe_clk_src clocks in the GCC driver.
> >
> > So, correct the names to be what the driver expects so that parenting
> > works.
> >
> > Before:
> > gcc_usb0_pipe_clk_src                0        0        0   125000000          0     0  50000         Y
> > gcc_usb1_pipe_clk_src                0        0        0   125000000          0     0  50000         Y
> >
> > After:
> >  usb3phy_0_cc_pipe_clk                1        1        0   125000000          0     0  50000         Y
> >     usb0_pipe_clk_src                 1        1        0   125000000          0     0  50000         Y
> >        gcc_usb0_pipe_clk              1        1        0   125000000          0     0  50000         Y
> >  usb3phy_1_cc_pipe_clk                1        1        0   125000000          0     0  50000         Y
> >     usb1_pipe_clk_src                 1        1        0   125000000          0     0  50000         Y
> >        gcc_usb1_pipe_clk              1        1        0   125000000          0     0  50000         Y
> >
> > Fixes: 5e09bc51d07b ("arm64: dts: ipq8074: enable USB support")
> > Signed-off-by: Robert Marko <robimarko@...il.com>
>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
>
> Nevertheless, could you please add .fw_name to these entries in gcc
> driver (as you did for other clocks in 35dc8e101a8e ("clk: qcom:
> ipq8074: populate fw_name for all parents")) and add all pipe clocks
> to the gcc node? This way you can drop clock-output-names from the PHY
> nodes.

As you noticed they are in the GCC patch already, after the PCI PIPE
parenting fixes
are merged I plan to add them to the GCC node to avoid global lookup.

Regards,
Robert
>
> > ---
> >  arch/arm64/boot/dts/qcom/ipq8074.dtsi | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
>
> [skipped]
>
> --
> With best wishes
> Dmitry