linux-kernel - Re: [PATCH v2 4/7] gpiolib: remove gpio_set

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Date:   Tue, 31 Jan 2023 21:44:31 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     linux-gpio@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/7] gpiolib: remove gpio_set_debounce

On Fri, Jan 27, 2023 at 11:11:46AM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> gpio_set_debounce() only has a single user, which is trivially
> converted to gpiod_set_debounce().
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  Documentation/driver-api/gpio/legacy.rst      |  2 --
>  .../zh_CN/driver-api/gpio/legacy.rst          |  1 -
>  Documentation/translations/zh_TW/gpio.txt     |  1 -
>  drivers/input/touchscreen/ads7846.c           | 25 ++++++++++---------
>  include/linux/gpio.h                          | 10 --------
>  5 files changed, 13 insertions(+), 26 deletions(-)
> 
> diff --git a/Documentation/driver-api/gpio/legacy.rst b/Documentation/driver-api/gpio/legacy.rst
> index a0559d93efd1..e0306e78e34b 100644
> --- a/Documentation/driver-api/gpio/legacy.rst
> +++ b/Documentation/driver-api/gpio/legacy.rst
> @@ -238,8 +238,6 @@ setup or driver probe/teardown code, so this is an easy constraint.)::
>          ## 	gpio_free_array()
>  
>                  gpio_free()
> -                gpio_set_debounce()
> -
>  
>  
>  Claiming and Releasing GPIOs
> diff --git a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst
> index 74fa473bb504..dee2a0517c1c 100644
> --- a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst
> +++ b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst
> @@ -219,7 +219,6 @@ GPIO 值的命令需要等待其信息排到队首才发送命令，再获得其
>          ## 	gpio_free_array()
>  
>                  gpio_free()
> -                gpio_set_debounce()
>  
>  
>  
> diff --git a/Documentation/translations/zh_TW/gpio.txt b/Documentation/translations/zh_TW/gpio.txt
> index 1b986bbb0909..dc608358d90a 100644
> --- a/Documentation/translations/zh_TW/gpio.txt
> +++ b/Documentation/translations/zh_TW/gpio.txt
> @@ -226,7 +226,6 @@ GPIO 值的命令需要等待其信息排到隊首才發送命令，再獲得其
>  ## 	gpio_free_array()
>  
>  	gpio_free()
> -	gpio_set_debounce()
>  
>  
>  
> diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
> index 4c3dd01902d0..da3c55d9cb98 100644
> --- a/drivers/input/touchscreen/ads7846.c
> +++ b/drivers/input/touchscreen/ads7846.c
> @@ -25,8 +25,8 @@
>  #include <linux/slab.h>
>  #include <linux/pm.h>
>  #include <linux/of.h>
> -#include <linux/of_gpio.h>
>  #include <linux/of_device.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/gpio.h>
>  #include <linux/spi/spi.h>
>  #include <linux/spi/ads7846.h>
> @@ -139,7 +139,7 @@ struct ads7846 {
>  	int			(*filter)(void *data, int data_idx, int *val);
>  	void			*filter_data;
>  	int			(*get_pendown_state)(void);
> -	int			gpio_pendown;
> +	struct gpio_desc	*gpio_pendown;
>  
>  	void			(*wait_for_sync)(void);
>  };
> @@ -222,7 +222,7 @@ static int get_pendown_state(struct ads7846 *ts)
>  	if (ts->get_pendown_state)
>  		return ts->get_pendown_state();
>  
> -	return !gpio_get_value(ts->gpio_pendown);
> +	return !gpiod_get_value(ts->gpio_pendown);

No, we can not blindly do that without checking annotations on GPIOs.

> +		ts->gpio_pendown = gpiod_get(&spi->dev, "pendown-gpio", GPIOD_IN);

Wrong name, you will be looking for "pendown-gpio-gpios".

Sorry, but I have to NAK this in the current form.

Thanks.

-- 
Dmitry