Re: [PATCH v1 1/1] pinctrl: st: Avoid using of_node member of struct gpio_chip

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Patrice Chotard <patrice.chotard@foss.st.com>,
	Linus Walleij <linus.walleij@linaro.org>
Subject: Re: [PATCH v1 1/1] pinctrl: st: Avoid using of_node member of struct gpio_chip
Date: Sun, 9 Oct 2022 23:13:44 -0700	[thread overview]
Message-ID: <Y0O4GNR28kSOR1Iu@google.com> (raw)
In-Reply-To: <20221004125449.67679-1-andriy.shevchenko@linux.intel.com>

Hi Andy,

On Tue, Oct 04, 2022 at 03:54:49PM +0300, Andy Shevchenko wrote:
> The of_node member of the struct gpio_chip is obsoleted and
> shouldn't be used. It will be removed in the future.
> 
> Replace its use in st_pctl_dt_calculate_pin() by comparing
> the fwnode pointers.
> 
> Fixes: e75729b2f63f ("pinctrl: st: stop abusing of_get_named_gpio()")
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
>  drivers/pinctrl/pinctrl-st.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
> index cf7f9cbe6044..ac24d07338a4 100644
> --- a/drivers/pinctrl/pinctrl-st.c
> +++ b/drivers/pinctrl/pinctrl-st.c
> @@ -1175,7 +1175,7 @@ static int st_pctl_dt_calculate_pin(struct st_pinctrl *info,
>  
>  	for (i = 0; i < info->nbanks; i++) {
>  		chip = &info->banks[i].gpio_chip;
> -		if (chip->of_node == np) {
> +		if (chip->fwnode == of_fwnode_handle(np)) {

Are you sure chip's fwnode is properly set here (without your other
patch)? I don't believe the driver sets it up, and I don't think gpiolib
maps it from the gpio_chip->of_node.

Actually, there is another reference to of_node in gpio chip in
st_gpiolib_register_bank()...

Thanks.

-- 
Dmitry