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

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Message-Id: <755C66F8-6B0E-469A-8419-6EFA290DA182@gmail.com>
Date:   Thu, 4 Mar 2021 09:27:15 +0100
From:   Álvaro Fernández Rojas <noltari@...il.com>
To:     Michael Walle <michael@...le.cc>
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

Hi Michael,

> El 4 mar 2021, a las 9:18, Michael Walle <michael@...le.cc> escribió:
> 
> 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."

I think I was still sleeping when I did this…
Excuse me for that :(

> 
> -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;

Best regards,
Álvaro.