linux-kernel - Re: [PATCH v4 00/18] Add support for Mobileye EyeQ5 system controller

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Date: Thu, 01 Feb 2024 11:30:46 +0100
From: Théo Lebrun <theo.lebrun@...tlin.com>
To: "Linus Walleij" <linus.walleij@...aro.org>
Cc: "Gregory CLEMENT" <gregory.clement@...tlin.com>, "Michael Turquette"
 <mturquette@...libre.com>, "Stephen Boyd" <sboyd@...nel.org>, "Rob Herring"
 <robh+dt@...nel.org>, "Krzysztof Kozlowski"
 <krzysztof.kozlowski+dt@...aro.org>, "Conor Dooley" <conor+dt@...nel.org>,
 "Thomas Bogendoerfer" <tsbogend@...ha.franken.de>,
 Rafał Miłecki <rafal@...ecki.pl>, "Philipp Zabel"
 <p.zabel@...gutronix.de>, "Vladimir Kondratiev"
 <vladimir.kondratiev@...ileye.com>, <linux-mips@...r.kernel.org>,
 <linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, "Thomas Petazzoni"
 <thomas.petazzoni@...tlin.com>, "Tawfik Bayouk"
 <tawfik.bayouk@...ileye.com>, <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v4 00/18] Add support for Mobileye EyeQ5 system
 controller

Hello Linus,

On Wed Jan 31, 2024 at 9:44 PM CET, Linus Walleij wrote:
> thanks for your patches!
>
> A *new* MIPS platform, not every day I see this!

Indeed! According the Wikipedia it got released to market on 2021, which
does sound recent from a MIPS standpoint. (The same year MIPS announced
the architecture would stop being developed in favor of RISC-V.)

> On Wed, Jan 31, 2024 at 5:27 PM Théo Lebrun <theo.lebrun@...tlin.com> wrote:
>
> > Pin control is about controlling bias, drive strength and muxing. The
> > latter allows two functions per pin; the first function is always GPIO
> > while the second one is pin-dependent. There exists two banks, each
> > handled in a separate driver instance. Each pin maps to one pin group.
> > That makes pin & group indexes the same, simplifying logic.
>
> Can the three pin control patches be merged separately? (It looks like.)

That is the goal. There are two dependencies in this series:

 - MIPS stuff depends on the base platform support series by Grégory,
   for devicetree stuff & MAINTAINERS mostly.
 - "dt-bindings: soc: mobileye: add EyeQ5 OLB system controller" depends
   on the three dt-bindings for the controllers (clk+reset+pinctrl) as
   it references them.

That means clk+reset+pinctrl can go in separately. At least that is the
goal, hoping I have not messed up along the way.

Thanks,

--
Théo Lebrun, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com