linux-kernel - Re: [PATCH RESEND] gpiolib: make gpiochip_find_by

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Date:   Tue, 20 Sep 2022 08:39:59 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Jianqun Xu <jay.xu@...k-chips.com>
Cc:     linus.walleij@...aro.org, andriy.shevchenko@...ux.intel.com,
        linux-gpio@...r.kernel.or, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org
Subject: Re: [PATCH RESEND] gpiolib: make gpiochip_find_by_name to be common function

On Tue, Sep 20, 2022 at 3:17 AM Jianqun Xu <jay.xu@...k-chips.com> wrote:
>
> Move find_chip_by_name from gpiolib to the gpio/driver.h, also rename to
> gpiochip_find_by_name, make it to be a common function.
>

Why did you resend it immediately? And what is the reason for this change?

Bart

> Signed-off-by: Jianqun Xu <jay.xu@...k-chips.com>
> ---
>  drivers/gpio/gpiolib.c      | 16 ++--------------
>  include/linux/gpio/driver.h | 12 ++++++++++++
>  2 files changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index cc9c0a12259e..c06334772c47 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -935,18 +935,6 @@ struct gpio_chip *gpiochip_find(void *data,
>  }
>  EXPORT_SYMBOL_GPL(gpiochip_find);
>
> -static int gpiochip_match_name(struct gpio_chip *gc, void *data)
> -{
> -       const char *name = data;
> -
> -       return !strcmp(gc->label, name);
> -}
> -
> -static struct gpio_chip *find_chip_by_name(const char *name)
> -{
> -       return gpiochip_find((void *)name, gpiochip_match_name);
> -}
> -
>  #ifdef CONFIG_GPIOLIB_IRQCHIP
>
>  /*
> @@ -3660,7 +3648,7 @@ void gpiod_add_hogs(struct gpiod_hog *hogs)
>                  * The chip may have been registered earlier, so check if it
>                  * exists and, if so, try to hog the line now.
>                  */
> -               gc = find_chip_by_name(hog->chip_label);
> +               gc = gpiochip_find_by_name(hog->chip_label);
>                 if (gc)
>                         gpiochip_machine_hog(gc, hog);
>         }
> @@ -3745,7 +3733,7 @@ static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id,
>                         return ERR_PTR(-EPROBE_DEFER);
>                 }
>
> -               gc = find_chip_by_name(p->key);
> +               gc = gpiochip_find_by_name(p->key);
>
>                 if (!gc) {
>                         /*
> diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
> index 6aeea1071b1b..4ed26a7d98ff 100644
> --- a/include/linux/gpio/driver.h
> +++ b/include/linux/gpio/driver.h
> @@ -618,6 +618,18 @@ extern int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip
>  extern struct gpio_chip *gpiochip_find(void *data,
>                               int (*match)(struct gpio_chip *gc, void *data));
>
> +static int gpiochip_match_name(struct gpio_chip *gc, void *data)
> +{
> +       const char *name = data;
> +
> +       return !strcmp(gc->label, name);
> +}
> +
> +static inline struct gpio_chip *gpiochip_find_by_name(const char *name)
> +{
> +       return gpiochip_find((void *)name, gpiochip_match_name);
> +}
> +
>  bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset);
>  int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset);
>  void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);
> --
> 2.25.1
>