linux-kernel - Re: [PATCH 0/2] Remove QDF2xxx pinctrl drivers

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Date: Tue, 23 Jan 2024 19:00:18 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Jeffrey Hugo <quic_jhugo@...cinc.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
 Linus Walleij <linus.walleij@...aro.org>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Marijn Suijten <marijn.suijten@...ainline.org>,
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/2] Remove QDF2xxx pinctrl drivers



On 1/22/24 20:23, Dmitry Baryshkov wrote:
> On Mon, 22 Jan 2024 at 20:44, Jeffrey Hugo <quic_jhugo@...cinc.com> wrote:
>>
>> On 1/22/2024 10:56 AM, Dmitry Baryshkov wrote:
>>> On Mon, 22 Jan 2024 at 19:43, Jeffrey Hugo <quic_jhugo@...cinc.com> wrote:
>>>>
>>>> On 1/22/2024 4:57 AM, Konrad Dybcio wrote:
>>>>> The SoC line was never productized, remove the maintenance burden.
>>>>>
>>>>> Compile-tested only.
>>>>>
>>>>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>>>>> ---
>>>>> Konrad Dybcio (2):
>>>>>          pinctrl: qcom: Remove QDF2xxx support
>>>>>          arm64: defconfig: Remove QDF24XX pinctrl
>>>>>
>>>>>     arch/arm64/configs/defconfig           |   1 -
>>>>>     drivers/pinctrl/qcom/Kconfig.msm       |   7 --
>>>>>     drivers/pinctrl/qcom/Makefile          |   1 -
>>>>>     drivers/pinctrl/qcom/pinctrl-qdf2xxx.c | 164 ---------------------------------
>>>>>     4 files changed, 173 deletions(-)
>>>>> ---
>>>>> base-commit: 319fbd8fc6d339e0a1c7b067eed870c518a13a02
>>>>> change-id: 20240122-topic-qdf_cleanup_pinctrl-98e17cdb375b
>>>>>
>>>>> Best regards,
>>>>
>>>> NACK.
>>>>
>>>> This was productized, there are some out in the wild, and the platform
>>>> is still in (limited) use.
>>>>
>>>> I'd like to see support hang around for a few more years yet.
>>>
>>> The problem is that... its support is pretty strange. I can see
>>> pinctrl, ethernet and quirks for the platform in GIC-ITS and PL011
>>> drivers. Is this enough to get the platform into the useful state? I
>>> can imagine that "QCOM2430" ACPI handle was used for USB hosts on that
>>> platform, but I don't remember when we last tested DWC3 with the ACPI.
>>>
>>> So, all this boils down to the question whether mainline (or something
>>> close by, LTS for example) is actually used and tested on these
>>> devices?
>>
>> Its an ACPI system, so you won't see all of the fun DTisms of a MSM chip.
>>
>> The platform was fully functional upstream, and had an Ubuntu
>> certification.  I run Ubuntu on the two that I have in my office.  I
>> haven't strictly checked out mainline in a while, but I could.  I still
>> have access to the documentation.
>>
>> There is a small, but active set of users including myself.  From what
>> I've seen, they've been happy with things.
> 
> Thanks for the information! It looks like it has a small but stable
> user base. I think we should keep it, maybe ensuring that we are able
> to test the kernel.

Alright, please make sure it still boots etc. then!

Konrad