linux-kernel - Re: [PATCH v2 00/30] Rework Nomadik GPIO to add Mobileye EyeQ5 support

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Message-ID: <CACRpkdbK2Sa_4qp3VE0ivHP8W6F-QDkuxV-XnZYviAkO5ZBMsg@mail.gmail.com>
Date: Thu, 29 Feb 2024 10:44:33 +0100
From: Linus Walleij <linus.walleij@...aro.org>
To: Théo Lebrun <theo.lebrun@...tlin.com>
Cc: Bartosz Golaszewski <brgl@...ev.pl>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Philipp Zabel <p.zabel@...gutronix.de>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-mips@...r.kernel.org, Gregory CLEMENT <gregory.clement@...tlin.com>, 
	Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>, 
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Tawfik Bayouk <tawfik.bayouk@...ileye.com>, 
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, Stephen Warren <swarren@...dotorg.org>, 
	Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org
Subject: Re: [PATCH v2 00/30] Rework Nomadik GPIO to add Mobileye EyeQ5 support

On Wed, Feb 28, 2024 at 12:28 PM Théo Lebrun <theo.lebrun@...tlin.com> wrote:

> This patch series reworks the Nomadik GPIO driver to bring it up to date
> to current kernel standards. We then add Mobileye EyeQ5 support that
> uses the same IP block but with limited functionality. We also add
> features required by our newly supported platform:
>
>  - Dynamic GPIO ID allocation;
>  - Make clock optional;
>  - Shared IRQ (usecase: EyeQ5 has two banks using the same IRQ);
>  - Handle variadic GPIO counts (usecase: EyeQ5 has <32 GPIOs per bank);
>  - Grab optional reset at probe (usecase: EyeQ5 has a shared GPIO reset).
>
> This GPIO platform driver was previously declared & registered inside
> drivers/pinctrl/nomadik/pinctrl-nomadik.c, side-by-side with the
> pinctrl driver. Both are tightly integrated, mostly for muxing reasons.
> Now that gpio-nomadik is used for another platform, we loosen the
> relationship. The behavior should not change on already supported
> hardware but I do not have Nomadik hardware to test for that.

I have queued the relevant patches to an immutable branch in the
pinctrl tree for testing and I can also pick up some ACKs if they arrive.

When I'm confident in the branch, I will send an optional pull request
to Bartosz for it!

Yours,
Linus Walleij