linux-kernel - Re: [PATCH v4 12/16] pinctrl: starfive: Add pinctrl driver for StarFive SoCs

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Date:   Mon, 22 Nov 2021 00:35:26 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Emil Renner Berthing <kernel@...il.dk>
Cc:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-serial@...r.kernel.org, Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Maximilian Luz <luzmaximilian@...il.com>,
        Sagar Kadam <sagar.kadam@...ive.com>,
        Drew Fustini <drew@...gleboard.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michael Zhu <michael.zhu@...rfivetech.com>,
        Fu Wei <tekkamanninja@...il.com>,
        Anup Patel <anup.patel@....com>,
        Atish Patra <atish.patra@....com>,
        Matteo Croce <mcroce@...rosoft.com>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        Huan Feng <huan.feng@...rfivetech.com>
Subject: Re: [PATCH v4 12/16] pinctrl: starfive: Add pinctrl driver for
 StarFive SoCs

On Tue, Nov 16, 2021 at 4:02 PM Emil Renner Berthing <kernel@...il.dk> wrote:

> Add a combined pinctrl and GPIO driver for the JH7100 RISC-V SoC by
> StarFive Ltd. This is a test chip for their upcoming JH7110 SoC, which
> is said to feature only minor changes to these pinctrl/GPIO parts.
>
> For each "GPIO" there are two registers for configuring the output and
> output enable signals which may come from other peripherals. Among these
> are two special signals that are constant 0 and constant 1 respectively.
> Controlling the GPIOs from software is done by choosing one of these
> signals. In other words the same registers are used for both pin muxing
> and controlling the GPIOs, which makes it easier to combine the pinctrl
> and GPIO driver in one.
>
> I wrote the pinconf and pinmux parts, but the GPIO part of the code is
> based on the GPIO driver in the vendor tree written by Huan Feng with
> cleanups and fixes by Drew and me.
>
> Datasheet: https://github.com/starfive-tech/JH7100_Docs/blob/main/JH7100%20Data%20Sheet%20V01.01.04-EN%20(4-21-2021).pdf
> Co-developed-by: Huan Feng <huan.feng@...rfivetech.com>
> Signed-off-by: Huan Feng <huan.feng@...rfivetech.com>
> Signed-off-by: Emil Renner Berthing <kernel@...il.dk>
> Co-developed-by: Drew Fustini <drew@...gleboard.org>
> Signed-off-by: Drew Fustini <drew@...gleboard.org>

Overall there is nothing wrong with this, and it is in nice shape.
Let's merge it:
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij