linux-kernel - Re: [PATCH 07/12] gpio: msc313: use new GPIO line value setter callbacks

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Message-ID: <CAFr9PXmeYETV5FSAnEacFCo7LiS3cYBpPqraexLC7=MTzshfNg@mail.gmail.com>
Date: Thu, 12 Jun 2025 07:21:56 +0900
From: Daniel Palmer <daniel@...ngy.jp>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Linus Walleij <linus.walleij@...aro.org>, Marek Behún <kabel@...nel.org>, 
	Conor Dooley <conor.dooley@...rochip.com>, Daire McNamara <daire.mcnamara@...rochip.com>, 
	Romain Perier <romain.perier@...il.com>, Avi Fishman <avifishman70@...il.com>, 
	Tomer Maimon <tmaimon77@...il.com>, Tali Perry <tali.perry1@...il.com>, 
	Patrick Venture <venture@...gle.com>, Nancy Yuen <yuenn@...gle.com>, 
	Benjamin Fair <benjaminfair@...gle.com>, Grygorii Strashko <grygorii.strashko@...com>, 
	Santosh Shilimkar <ssantosh@...nel.org>, Kevin Hilman <khilman@...nel.org>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	linux-arm-kernel@...ts.infradead.org, openbmc@...ts.ozlabs.org, 
	linux-omap@...r.kernel.org, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH 07/12] gpio: msc313: use new GPIO line value setter callbacks

Hi Bartosz,

On Tue, 10 Jun 2025 at 21:33, Bartosz Golaszewski <brgl@...ev.pl> wrote:
>
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
>  drivers/gpio/gpio-msc313.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpio/gpio-msc313.c b/drivers/gpio/gpio-msc313.c
> index 6db9e469e0dc254e791d497b89a4c6d329d0add4..992339a89d19840fc03ccf849972a83cb86415ae 100644
> --- a/drivers/gpio/gpio-msc313.c
> +++ b/drivers/gpio/gpio-msc313.c
> @@ -486,7 +486,7 @@ struct msc313_gpio {
>         u8 *saved;
>  };
>
> -static void msc313_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
> +static int msc313_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
>  {
>         struct msc313_gpio *gpio = gpiochip_get_data(chip);
>         u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]);
> @@ -497,6 +497,8 @@ static void msc313_gpio_set(struct gpio_chip *chip, unsigned int offset, int val
>                 gpioreg &= ~MSC313_GPIO_OUT;
>
>         writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]);
> +
> +       return 0;
>  }
>
>  static int msc313_gpio_get(struct gpio_chip *chip, unsigned int offset)
> @@ -656,7 +658,7 @@ static int msc313_gpio_probe(struct platform_device *pdev)
>         gpiochip->direction_input = msc313_gpio_direction_input;
>         gpiochip->direction_output = msc313_gpio_direction_output;
>         gpiochip->get = msc313_gpio_get;
> -       gpiochip->set = msc313_gpio_set;
> +       gpiochip->set_rv = msc313_gpio_set;
>         gpiochip->base = -1;
>         gpiochip->ngpio = gpio->gpio_data->num;
>         gpiochip->names = gpio->gpio_data->names;
>
> --
> 2.48.1
>

Reviewed-by: Daniel Palmer <daniel@...ngy.jp>

Cheers,

Daniel