linux-kernel - Re: [PATCH 1/9] dt-bindings: phy: qcom,uniphy: Rename ipq4019 usb PHY to UNIPHY

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Message-ID: <CAA8EJpofAM4deqg1H_WSh2uJavTEXQC5x=26P1FLAUgJcT7yOg@mail.gmail.com>
Date:   Thu, 31 Aug 2023 15:34:05 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Praveenkumar I <quic_ipkumar@...cinc.com>
Cc:     robert.marko@...tura.hr, luka.perkov@...tura.hr, agross@...nel.org,
        andersson@...nel.org, konrad.dybcio@...aro.org, vkoul@...nel.org,
        kishon@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        gregkh@...uxfoundation.org, catalin.marinas@....com,
        will@...nel.org, p.zabel@...gutronix.de, arnd@...db.de,
        geert+renesas@...der.be, nfraprado@...labora.com, rafal@...ecki.pl,
        peng.fan@....com, quic_wcheng@...cinc.com,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        quic_varada@...cinc.com
Subject: Re: [PATCH 1/9] dt-bindings: phy: qcom,uniphy: Rename ipq4019 usb PHY
 to UNIPHY

On Thu, 31 Aug 2023 at 15:30, Praveenkumar I <quic_ipkumar@...cinc.com> wrote:
>
>
> On 8/31/2023 5:47 PM, Dmitry Baryshkov wrote:
> > On Thu, 31 Aug 2023 at 14:54, Praveenkumar I <quic_ipkumar@...cinc.com> wrote:
> >>
> >> On 8/29/2023 7:49 PM, Dmitry Baryshkov wrote:
> >>> On Tue, 29 Aug 2023 at 16:59, Praveenkumar I <quic_ipkumar@...cinc.com> wrote:
> >>>> UNIPHY / Combo PHY used on various qualcomm SoC's are very similar to
> >>>> ipq4019 PHY. Hence renaming this dt-binding to uniphy dt-binding and
> >>>> can be used for other qualcomm SoCs which are having similar UNIPHY.
> >>>>
> >>>> Signed-off-by: Praveenkumar I <quic_ipkumar@...cinc.com>
> >>>> ---
> >>>>    .../phy/{qcom-usb-ipq4019-phy.yaml => qcom,uniphy.yaml}  | 9 +++++++--
> >>>>    1 file changed, 7 insertions(+), 2 deletions(-)
> >>>>    rename Documentation/devicetree/bindings/phy/{qcom-usb-ipq4019-phy.yaml => qcom,uniphy.yaml} (78%)
> >>>>
> >>>> diff --git a/Documentation/devicetree/bindings/phy/qcom-usb-ipq4019-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,uniphy.yaml
> >>>> similarity index 78%
> >>>> rename from Documentation/devicetree/bindings/phy/qcom-usb-ipq4019-phy.yaml
> >>>> rename to Documentation/devicetree/bindings/phy/qcom,uniphy.yaml
> >>>> index 09c614952fea..cbe2cc820009 100644
> >>>> --- a/Documentation/devicetree/bindings/phy/qcom-usb-ipq4019-phy.yaml
> >>>> +++ b/Documentation/devicetree/bindings/phy/qcom,uniphy.yaml
> >>>> @@ -1,13 +1,18 @@
> >>>>    # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> >>>>    %YAML 1.2
> >>>>    ---
> >>>> -$id: http://devicetree.org/schemas/phy/qcom-usb-ipq4019-phy.yaml#
> >>>> +$id: http://devicetree.org/schemas/phy/qcom,uniphy.yaml#
> >>>>    $schema: http://devicetree.org/meta-schemas/core.yaml#
> >>>>
> >>>> -title: Qualcom IPQ40xx Dakota HS/SS USB PHY
> >>>> +title: Qualcomm UNIPHY
> >>> We know that UNIPHY was a common design / IP block used for APQ8064
> >>> SATA and MSM8974 DSI and HDMI PHYs. Is this the same design, or was
> >>> the name reused by the Qualcomm for some other PHYs?
> >>> Several latest generations have USB QMP PHYs which are called 'uni-phy'.
> >> This PHY is build on top of QCA Uniphy 22ull. A combo PHY used between
> >> USB Gen3 / PCIe Gen3 controller.
> >> It is different from USB QMP PHYs.
> > So we have now three different items called Qualcomm uniphy. Could you
> > please add some distinctive name?
> There is one more target called IPQ5018 which is also having similar USB
> PHY built on top of
> Uniphy 28nm LP. That also can leverage this upcoming IPQ5332 USB PHY
> driver. Considering that,
> given a common name 'uniphy'.

Just to verify, do we mean the same thing, when speaking about the
28nm LP UNIPHY?
I was referencing the apq8064 SATA and msm8974 HDMI / DSI PHYs. See [1] and [2].

[1] https://patchwork.freedesktop.org/patch/544131/?series=118210&rev=2
[2] https://patchwork.freedesktop.org/patch/544125/?series=118210&rev=2

>
> - Praveenkumar
> >
> >> - Praveenkumar
> >>>>    maintainers:
> >>>>      - Robert Marko <robert.marko@...tura.hr>
> >>>> +  - Praveenkumar I <quic_ipkumar@...cinc.com>
> >>>> +
> >>>> +description:
> >>>> +  UNIPHY / COMBO PHY supports physical layer functionality for USB and PCIe on
> >>>> +  Qualcomm chipsets.
> >>>>
> >>>>    properties:
> >>>>      compatible:
> >>>> --
> >>>> 2.34.1
> >>>>
> >
> >



-- 
With best wishes
Dmitry