linux-kernel - Re: [PATCH v2] gpio: regmap: set gpio_chip of

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Date:   Thu, 04 Mar 2021 09:18:53 +0100
From:   Michael Walle <michael@...le.cc>
To:     Álvaro Fernández Rojas <noltari@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] gpio: regmap: set gpio_chip of_node

Am 2021-03-04 08:15, schrieb Álvaro Fernández Rojas:
> This is needed for properly registering gpio regmap as a child of a 
> regmap
> pin controller.
> 
> Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
> Reviewed-by: Michael Walle <michael@...le.cc>
> ---
>  v2: split this patch from the bcm63xx-pinctrl series
> 
>  drivers/gpio/gpio-regmap.c  | 1 +
>  include/linux/gpio/regmap.h | 3 +++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
> index fed1e269c42a..8898ab3e1d59 100644
> --- a/drivers/gpio/gpio-regmap.c
> +++ b/drivers/gpio/gpio-regmap.c
> @@ -249,6 +249,7 @@ struct gpio_regmap *gpio_regmap_register(const
> struct gpio_regmap_config *config
> 
>  	chip = &gpio->gpio_chip;
>  	chip->parent = config->parent;
> +	chip->of_node = config->of_node ?: dev_of_node(config->parent);
>  	chip->base = -1;
>  	chip->ngpio = config->ngpio;
>  	chip->names = config->names;
> diff --git a/include/linux/gpio/regmap.h b/include/linux/gpio/regmap.h
> index ad76f3d0a6ba..566d76d0dbae 100644
> --- a/include/linux/gpio/regmap.h
> +++ b/include/linux/gpio/regmap.h
> @@ -4,6 +4,7 @@
>  #define _LINUX_GPIO_REGMAP_H
> 
>  struct device;
> +struct device_node;
>  struct gpio_regmap;
>  struct irq_domain;
>  struct regmap;
> @@ -15,6 +16,7 @@ struct regmap;
>   * struct gpio_regmap_config - Description of a generic regmap 
> gpio_chip.
>   * @parent:		The parent device
>   * @regmap:		The regmap used to access the registers
> + * @of_node:		(Optional) The device node
>   *			given, the name of the device is used

Something is messed up here ;) This line should be together with
the one containing @regmap. While at it please add the
"If not given, the of_node of the parent device is used."

-michael

>   * @label:		(Optional) Descriptive name for GPIO controller.
>   *			If not given, the name of the device is used.
> @@ -57,6 +59,7 @@ struct regmap;
>  struct gpio_regmap_config {
>  	struct device *parent;
>  	struct regmap *regmap;
> +	struct device_node *of_node;
> 
>  	const char *label;
>  	int ngpio;