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Message-ID: <0007b5ff-34d4-44c0-80bd-8277d5842c01@linaro.org>
Date:   Sat, 7 Oct 2023 01:57:55 +0200
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Subject: Re: [PATCH 2/8] phy: qcom: Introduce Super-Speed USB UNIPHY driver
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To:     Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Praveenkumar I <quic_ipkumar@quicinc.com>
Cc:     agross@kernel.org, andersson@kernel.org, vkoul@kernel.org,
        kishon@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
        gregkh@linuxfoundation.org, catalin.marinas@arm.com,
        will@kernel.org, p.zabel@pengutronix.de, geert+renesas@glider.be,
        arnd@arndb.de, neil.armstrong@linaro.org, nfraprado@collabora.com,
        u-kumar1@ti.com, peng.fan@nxp.com, quic_wcheng@quicinc.com,
        quic_varada@quicinc.com, linux-arm-msm@vger.kernel.org,
        linux-phy@lists.infradead.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, quic_kathirav@quicinc.com,
        quic_nsekar@quicinc.com, quic_srichara@quicinc.com
References: <20230929084209.3033093-1-quic_ipkumar@quicinc.com>
 <20230929084209.3033093-3-quic_ipkumar@quicinc.com>
 <412492d1-fcc9-481c-9d28-b208a644ba1d@linaro.org>
 <7975c638-29cf-45ce-9d76-b8a93d750eb7@quicinc.com>
 <CAA8EJprhQz_Tj0Bhv6zhGa7h37Ug-Fp6Tof9tNscTFyZzkbJvw@mail.gmail.com>
From:   Konrad Dybcio <konrad.dybcio@linaro.org>
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On 3.10.2023 16:54, Dmitry Baryshkov wrote:
> On Tue, 3 Oct 2023 at 17:22, Praveenkumar I <quic_ipkumar@quicinc.com> wrote:
>>
>>
>>
>> On 9/30/2023 10:48 PM, Dmitry Baryshkov wrote:
>>> On 29/09/2023 11:42, Praveenkumar I wrote:
>>>> Adds Qualcomm 22ull Super-Speed USB UNIPHY driver support which
>>>> is present in Qualcomm IPQ5332 SoC. This PHY is interfaced with
>>>> SNPS DWC3 USB and SNPS DWC PCIe. Either one of the interface
>>>> can use the it and selection is done via mux present in TCSR
>>>> register. This driver selects the PHY for DWC3 USB and handles
>>>> the reset, clocks and regulator.
>>>>
>>>> Signed-off-by: Praveenkumar I <quic_ipkumar@quicinc.com>
>>>> ---
>>>>   drivers/phy/qualcomm/Kconfig               |  11 +
>>>>   drivers/phy/qualcomm/Makefile              |   1 +
>>>>   drivers/phy/qualcomm/phy-qcom-uniphy-usb.c | 322 +++++++++++++++++++++
>>>>   3 files changed, 334 insertions(+)
>>>>   create mode 100644 drivers/phy/qualcomm/phy-qcom-uniphy-usb.c
>>>>
>>>> diff --git a/drivers/phy/qualcomm/Kconfig b/drivers/phy/qualcomm/Kconfig
>>>> index d891058b7c39..7257c8455c53 100644
>>>> --- a/drivers/phy/qualcomm/Kconfig
>>>> +++ b/drivers/phy/qualcomm/Kconfig
>>>> @@ -154,6 +154,17 @@ config PHY_QCOM_M31_USB
>>>>         management. This driver is required even for peripheral only or
>>>>         host only mode configurations.
>>>>   +config PHY_QCOM_UNIPHY_USB
>>>> +    tristate "Qualcomm USB Super-Speed UNIPHY driver"
>>>
>>> Can we please have more specific driver name? As I wrote earlier,
>>> there are two other (different) kinds of Qualcomm UNI PHY devices:
>>> - DSI / HDMI UNIPHY on apq8064 / msm8974 / msm8960 (?)
>>> - USB QMP UNI PHY drivers
>>>
>>> Adding a driver called UNIPHY, which is not related to those two kinds
>>> sounds pretty confusing to me.
>> This UNIPHY is different from above mentioned ones. This a custom
>> version for 22nm on Qualcomm IPQ5332.
>> Can we name the driver as phy-qcom-uniphy-usb-ss-22ull.c /
>> phy-qcom-usb-ss-22ull.c ?
> 
> usb-ss-22ull sounds better. Or maybe usb-ipq-ss
usb-ipq-ss is as safe as usb-msm-ss

We can not rely on the hardware never ever changing down the
product line :D

Konrad