linux-kernel - Re: [PATCH v8 1/2] gpio: loongson: add gpio driver support

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Message-ID: <CACRpkdZoD8v6pPStaKLf14houZk5e89ZBz5wZJVQJxJ1Xq37Ug@mail.gmail.com>
Date:   Mon, 28 Nov 2022 21:35:56 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Yinbo Zhu <zhuyinbo@...ngson.cn>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        WANG Xuerui <kernel@...0n.name>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Juxin Gao <gaojuxin@...ngson.cn>,
        Bibo Mao <maobibo@...ngson.cn>,
        Yanteng Si <siyanteng@...ngson.cn>, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        loongarch@...ts.linux.dev, linux-mips@...r.kernel.org,
        Arnaud Patard <apatard@...driva.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Jianmin Lv <lvjianmin@...ngson.cn>,
        Hongchen Zhang <zhanghongchen@...ngson.cn>,
        Liu Peibao <liupeibao@...ngson.cn>
Subject: Re: [PATCH v8 1/2] gpio: loongson: add gpio driver support

On Mon, Nov 28, 2022 at 7:43 AM Yinbo Zhu <zhuyinbo@...ngson.cn> wrote:

> The Loongson platforms GPIO controller contains 60 GPIO pins in total,
> 4 of which are dedicated GPIO pins, and the remaining 56 are reused
> with other functions. Each GPIO can set input/output and has the
> interrupt capability.
>
> This driver added support for Loongson GPIO controller and support to
> use DTS or ACPI to descibe GPIO device resources.
>
> Signed-off-by: Jianmin Lv <lvjianmin@...ngson.cn>
> Signed-off-by: Hongchen Zhang <zhanghongchen@...ngson.cn>
> Signed-off-by: Liu Peibao <liupeibao@...ngson.cn>
> Signed-off-by: Juxin Gao <gaojuxin@...ngson.cn>
> Signed-off-by: Yinbo Zhu <zhuyinbo@...ngson.cn>

v8 looks really nice.

> +static int loongson_gpio_to_irq(
> +                       struct gpio_chip *chip, unsigned int offset)
> +{
> +       struct platform_device *pdev =
> +               container_of(chip->parent, struct platform_device, dev);
> +
> +       if (offset >= chip->ngpio)
> +               return -EINVAL;

You forgot to drop this.

With this fixed (and Bartosz requested fix):
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij