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From: Linus Walleij <linus.walleij@linaro.org>
Date: Wed, 31 Jan 2024 21:29:23 +0100
Message-ID: <CACRpkdaZBMZX5=ygwG0pxbZHJ80w4Z=9-zJ6zV0P2rWXajxP+g@mail.gmail.com>
Subject: Re: [PATCH 22/22] gpio: mark unsafe gpio_chip manipulators as deprecated
To: Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Kent Gibson <warthog618@gmail.com>, Alex Elder <elder@linaro.org>, 
	Geert Uytterhoeven <geert+renesas@glider.be>, "Paul E . McKenney" <paulmck@kernel.org>, 
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Wolfram Sang <wsa@the-dreams.de>, 
	linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, 
	Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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On Tue, Jan 30, 2024 at 1:49=E2=80=AFPM Bartosz Golaszewski <brgl@bgdev.pl>=
 wrote:

> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> We still have some functions that return the address of the GPIO chip
> associated with the GPIO device. This is dangerous and the users should
> find a better solution. Let's add appropriate comments to the kernel
> docs.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

I'm not sure it's very easy to find a better solution for gpiod_to_chip(),
but perhaps also add this as a work item to the TODO file? We can certainly
try to get rid of <linux/gpio.h> before we need to look into fixing this...

gpiod_device_get_label() should be easy to fix:
linus@lino:~/linux$ git grep gpio_device_get_label
drivers/gpio/gpiolib.c: * gpio_device_get_label() - Get the label of
this GPIO device
drivers/gpio/gpiolib.c:const char *gpio_device_get_label(struct
gpio_device *gdev)
drivers/gpio/gpiolib.c:EXPORT_SYMBOL(gpio_device_get_label);
drivers/pinctrl/core.c:                            gpio_device_get_label(gd=
ev));
include/linux/gpio/driver.h:const char *gpio_device_get_label(struct
gpio_device *gdev);

We only created that problem for ourselves... It should be removed
from <linux/gpio/driver.h>.

Anyway:
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij