linux-kernel - Re: [PATCH v2 5/7] gpio: gpiolib-acpi: Export acpi_get

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Date:   Mon, 18 Jan 2021 09:37:40 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Daniel Scally <djrscally@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-i2c@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, devel@...ica.org,
        rjw@...ysocki.net, lenb@...nel.org, andy@...nel.org,
        mika.westerberg@...ux.intel.com, linus.walleij@...aro.org,
        bgolaszewski@...libre.com, wsa@...nel.org, lee.jones@...aro.org,
        hdegoede@...hat.com, mgross@...ux.intel.com,
        robert.moore@...el.com, erik.kaneda@...el.com,
        sakari.ailus@...ux.intel.com, andriy.shevchenko@...ux.intel.com,
        kieran.bingham@...asonboard.com
Subject: Re: [PATCH v2 5/7] gpio: gpiolib-acpi: Export acpi_get_gpiod()

Hi Daniel,

Thank you for the patch.

On Mon, Jan 18, 2021 at 12:34:26AM +0000, Daniel Scally wrote:
> I need to be able to translate GPIO resources in an acpi_device's _CRS
> into gpio_descs. Those are represented in _CRS as a pathname to a GPIO
> device plus the pin's index number: this function is perfect for that
> purpose.
> 
> Signed-off-by: Daniel Scally <djrscally@...il.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
> Changes in v2:
> 
> 	-None
> 
>  drivers/gpio/gpiolib-acpi.c | 3 ++-
>  include/linux/acpi.h        | 5 +++++
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
> index e37a57d0a2f0..83f9f85cd0ab 100644
> --- a/drivers/gpio/gpiolib-acpi.c
> +++ b/drivers/gpio/gpiolib-acpi.c
> @@ -111,7 +111,7 @@ static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
>   * controller does not have GPIO chip registered at the moment. This is to
>   * support probe deferral.
>   */
> -static struct gpio_desc *acpi_get_gpiod(char *path, int pin)
> +struct gpio_desc *acpi_get_gpiod(char *path, int pin)
>  {
>  	struct gpio_chip *chip;
>  	acpi_handle handle;
> @@ -127,6 +127,7 @@ static struct gpio_desc *acpi_get_gpiod(char *path, int pin)
>  
>  	return gpiochip_get_desc(chip, pin);
>  }
> +EXPORT_SYMBOL_GPL(acpi_get_gpiod);
>  
>  static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
>  {
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 2630c2e953f7..5cd272326eb7 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -1066,6 +1066,7 @@ void __acpi_handle_debug(struct _ddebug *descriptor, acpi_handle handle, const c
>  bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
>  				struct acpi_resource_gpio **agpio);
>  int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index);
> +struct gpio_desc *acpi_get_gpiod(char *path, int pin);
>  #else
>  static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
>  					      struct acpi_resource_gpio **agpio)
> @@ -1076,6 +1077,10 @@ static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
>  {
>  	return -ENXIO;
>  }
> +struct gpio_desc *acpi_get_gpiod(char *path, int pin)
> +{
> +	return NULL;
> +}
>  #endif
>  
>  /* Device properties */

-- 
Regards,

Laurent Pinchart