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

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Date: Mon, 22 Jan 2024 11:44:09 -0700
From: Jeffrey Hugo <quic_jhugo@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: Konrad Dybcio <konrad.dybcio@...aro.org>,
        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 1/22/2024 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.

-Jeff