linux-kernel - Re: [PATCH v5 0/7] gpio: update i.MX93/8ULP and support i.MX95

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Message-ID: <CAMRc=MeNmEuXNgyw9eWCBoVLyo59UTB+45rMUY1uUk+0K_bYUw@mail.gmail.com>
Date:   Thu, 5 Oct 2023 19:54:08 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andy@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Stefan Agner <stefan@...er.ch>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Marco Felsch <m.felsch@...gutronix.de>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Peng Fan <peng.fan@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v5 0/7] gpio: update i.MX93/8ULP and support i.MX95

On Sun, Oct 1, 2023 at 10:23 AM Peng Fan (OSS) <peng.fan@....nxp.com> wrote:
>
> From hardware perspective:
> - i.MX8ULP/93 GPIO supports two interrupts, 1st for Trustzone non-secure irq,
>   2nd for Trustzone secure irq.
> - i.MX8ULP/93 only has one register base
>
> The current linux gpio-vf610.c could work with i.MX8ULP/i.MX93, it is
> because some trick did in device tree node with offset added to base:
>   reg = <0x2d010080 0x1000>, <0x2d010040 0x40>;
> But actually the register base should be 0x2d010000.
>
> So i.MX8ULP/93 is not HW compatible with i.MX7ULP.
>
> i.MX93 GPIO is directly derived from i.MX8ULP, so make i.MX93 compatible
> with i.MX8ULP. i.MX95 GPIO is same as i.MX93, so also compatible with
> i.MX8ULP
>
> There maybe dtbs_check failure if only test the 1st patch. After
> the patchset applied, no failure.
>
> To make avoid break old bindings from work, update the driver
> to support both old/new bindings.
>
> ---
> Changes in v5:
> - Add R-b for patch 1, 2
> - Simplify code a bit more in patch 4 pPer Marco's comments
> - Update patch 5 to only drop port->sdata check, since patch 4 is changed.
> - Link to v4: https://lore.kernel.org/r/20230926-vf610-gpio-v4-0-b57b7f6e8368@nxp.com
>
> Changes in v4:
>  Change to minItems for allOf: else: interrupts
>  Update commit log for patch 4/6
>  Follow Marco's comments for patch 4/6
>  Add a new patch 5/6 Per Marco's comments.
>
> Changes in v3:
> Update patch v2 2/6
> Update commit log in patch v2 5/6
> Add A-b from DT maintainer for patch v2 1/6, 3/6
> - Link to v2: https://lore.kernel.org/r/20230916-vf610-gpio-v2-0-40823da788d7@nxp.com
>
> Changes in v2:
> - Update bindings with describe items, add one reg base for i.MX8ULP/93
> - Update driver to support one reg base, support both new/old bindings
> - Add a new patch 1 to update gpio-ranges found in dtbs_check
> - Link to v1: https://lore.kernel.org/r/20230914-vf610-gpio-v1-0-3ed418182a6a@nxp.com
>
> ---
> Peng Fan (7):
>       dt-bindings: gpio: vf610: update gpio-ranges
>       dt-bindings: gpio: vf610: correct i.MX8ULP and i.MX93
>       dt-bindings: gpio: vf610: add i.MX95 compatible
>       gpio: vf610: add i.MX8ULP of_device_id entry
>       gpio: vf610: simplify code by dropping data check
>       arm64: dts: imx8ulp: update gpio node
>       arm64: dts: imx93: update gpio node
>
>  .../devicetree/bindings/gpio/gpio-vf610.yaml       | 40 +++++++++++++---
>  arch/arm64/boot/dts/freescale/imx8ulp.dtsi         | 21 +++++----
>  arch/arm64/boot/dts/freescale/imx93.dtsi           | 28 +++++++-----
>  drivers/gpio/gpio-vf610.c                          | 53 ++++++++++++++++++----
>  4 files changed, 105 insertions(+), 37 deletions(-)
> ---
> base-commit: e143016b56ecb0fcda5bb6026b0a25fe55274f56
> change-id: 20230914-vf610-gpio-46edacd2b513
>
> Best regards,
> --
> Peng Fan <peng.fan@....com>
>

This looks good enough. I applied patches 1-5. If you could send a
follow-up with a comment clarification for patch 4/5, that would be
great.

Thanks,
Bart