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

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Message-ID: <CAA8EJpr2g=b8+M9r20KJoK+VVTabgctvB9eLmwivmi5qgBddFQ@mail.gmail.com>
Date: Mon, 22 Jan 2024 21:23:51 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Jeffrey Hugo <quic_jhugo@...cinc.com>
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 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.

-- 
With best wishes
Dmitry