linux-kernel - Re: [PATCH v1 1/2] gpiolib-of: Make of_gpio_get_count() take firmware node as a parameter

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Message-ID: <8862c6a9-529c-4c52-a84b-176e6d61351a@alliedtelesis.co.nz>
Date: Wed, 28 Feb 2024 20:23:10 +0000
From: Chris Packham <Chris.Packham@...iedtelesis.co.nz>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Bartosz Golaszewski
	<bartosz.golaszewski@...aro.org>, "linux-gpio@...r.kernel.org"
	<linux-gpio@...r.kernel.org>, "linux-acpi@...r.kernel.org"
	<linux-acpi@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
CC: Mika Westerberg <mika.westerberg@...ux.intel.com>, Linus Walleij
	<linus.walleij@...aro.org>, Bartosz Golaszewski <brgl@...ev.pl>
Subject: Re: [PATCH v1 1/2] gpiolib-of: Make of_gpio_get_count() take firmware
 node as a parameter


On 29/02/24 07:40, Andy Shevchenko wrote:
> Make of_gpio_get_count() take firmware node as a parameter in order
> to be aligned with other functions and decouple form unused device
typo: form -> from
> pointer. The latter helps to create a common fwnode_gpio_count()
> in the future.
>
> While at it, rename to be of_gpio_count() to be aligned with the others.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>   drivers/gpio/gpiolib-of.c | 13 ++++++-------
>   drivers/gpio/gpiolib-of.h |  5 +++--
>   drivers/gpio/gpiolib.c    |  2 +-
>   3 files changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
> index e35a9c7da4ee..c0eae8924074 100644
> --- a/drivers/gpio/gpiolib-of.c
> +++ b/drivers/gpio/gpiolib-of.c
> @@ -68,7 +68,7 @@ static int of_gpio_named_count(const struct device_node *np,
>   
>   /**
>    * of_gpio_spi_cs_get_count() - special GPIO counting for SPI
> - * @dev:    Consuming device
> + * @np:    Consuming device node
>    * @con_id: Function within the GPIO consumer
>    *
>    * Some elder GPIO controllers need special quirks. Currently we handle
> @@ -78,10 +78,8 @@ static int of_gpio_named_count(const struct device_node *np,
>    * the counting of "cs-gpios" to count "gpios" transparent to the
>    * driver.
>    */
> -static int of_gpio_spi_cs_get_count(struct device *dev, const char *con_id)
> +static int of_gpio_spi_cs_get_count(const struct device_node *np, const char *con_id)
>   {
> -	struct device_node *np = dev->of_node;
> -
>   	if (!IS_ENABLED(CONFIG_SPI_MASTER))
>   		return 0;
>   	if (!con_id || strcmp(con_id, "cs"))
> @@ -93,13 +91,14 @@ static int of_gpio_spi_cs_get_count(struct device *dev, const char *con_id)
>   	return of_gpio_named_count(np, "gpios");
>   }
>   
> -int of_gpio_get_count(struct device *dev, const char *con_id)
> +int of_gpio_count(const struct fwnode_handle *fwnode, const char *con_id)
>   {
> +	const struct device_node *np = to_of_node(fwnode);
>   	int ret;
>   	char propname[32];
>   	unsigned int i;
>   
> -	ret = of_gpio_spi_cs_get_count(dev, con_id);
> +	ret = of_gpio_spi_cs_get_count(np, con_id);
>   	if (ret > 0)
>   		return ret;
>   
> @@ -111,7 +110,7 @@ int of_gpio_get_count(struct device *dev, const char *con_id)
>   			snprintf(propname, sizeof(propname), "%s",
>   				 gpio_suffixes[i]);
>   
> -		ret = of_gpio_named_count(dev->of_node, propname);
> +		ret = of_gpio_named_count(np, propname);
>   		if (ret > 0)
>   			break;
>   	}
> diff --git a/drivers/gpio/gpiolib-of.h b/drivers/gpio/gpiolib-of.h
> index 6b3a5347c5d9..19988c1354fa 100644
> --- a/drivers/gpio/gpiolib-of.h
> +++ b/drivers/gpio/gpiolib-of.h
> @@ -9,6 +9,7 @@
>   #include <linux/notifier.h>
>   
>   struct device;
> +struct fwnode_handle;
>   
>   struct gpio_chip;
>   struct gpio_desc;
> @@ -21,7 +22,7 @@ struct gpio_desc *of_find_gpio(struct device_node *np,
>   			       unsigned long *lookupflags);
>   int of_gpiochip_add(struct gpio_chip *gc);
>   void of_gpiochip_remove(struct gpio_chip *gc);
> -int of_gpio_get_count(struct device *dev, const char *con_id);
> +int of_gpio_count(const struct fwnode_handle *fwnode, const char *con_id);
>   #else
>   static inline struct gpio_desc *of_find_gpio(struct device_node *np,
>   					     const char *con_id,
> @@ -32,7 +33,7 @@ static inline struct gpio_desc *of_find_gpio(struct device_node *np,
>   }
>   static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; }
>   static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
> -static inline int of_gpio_get_count(struct device *dev, const char *con_id)
> +static inline int of_gpio_count(const struct fwnode_handle *fwnode, const char *con_id)
>   {
>   	return 0;
>   }
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index 5fa3bf7b55bd..a93271b3d538 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -4285,7 +4285,7 @@ int gpiod_count(struct device *dev, const char *con_id)
>   	int count = -ENOENT;
>   
>   	if (is_of_node(fwnode))
> -		count = of_gpio_get_count(dev, con_id);
> +		count = of_gpio_count(fwnode, con_id);
>   	else if (is_acpi_node(fwnode))
>   		count = acpi_gpio_count(dev, con_id);
>   	else if (is_software_node(fwnode))