Commit 043d7f09 authored by Daniel Scally's avatar Daniel Scally Committed by Andy Shevchenko
Browse files

gpiolib: acpi: Add acpi_gpio_get_io_resource() 



Add a function to verify that a given ACPI resource represents a GpioIo()
type of resource, and return it if so.

Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarDaniel Scally <djrscally@gmail.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent 43582f29

drivers/gpio/gpiolib-acpi.c

+23 −0
Original line number Diff line number Diff line
@@ -196,6 +196,29 @@ bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, 
}

EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource);



/**

 * acpi_gpio_get_io_resource - Fetch details of an ACPI resource if it is a GPIO

 *			       I/O resource or return False if not.

 * @ares:	Pointer to the ACPI resource to fetch

 * @agpio:	Pointer to a &struct acpi_resource_gpio to store the output pointer

 */

bool acpi_gpio_get_io_resource(struct acpi_resource *ares,

			       struct acpi_resource_gpio **agpio)

{

	struct acpi_resource_gpio *gpio;



	if (ares->type != ACPI_RESOURCE_TYPE_GPIO)

		return false;



	gpio = &ares->data.gpio;

	if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_IO)

		return false;



	*agpio = gpio;

	return true;

}

EXPORT_SYMBOL_GPL(acpi_gpio_get_io_resource);



static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio,

				      struct acpi_gpio_event *event)

{

include/linux/acpi.h

+7 −0
Original line number Diff line number Diff line
@@ -1096,6 +1096,8 @@ void __acpi_handle_debug(struct _ddebug *descriptor, acpi_handle handle, const c 
#if defined(CONFIG_ACPI) && defined(CONFIG_GPIOLIB)

bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,

				struct acpi_resource_gpio **agpio);

bool acpi_gpio_get_io_resource(struct acpi_resource *ares,

			       struct acpi_resource_gpio **agpio);

int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index);

#else

static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
@@ -1103,6 +1105,11 @@ static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, 
{

	return false;

}

static inline bool acpi_gpio_get_io_resource(struct acpi_resource *ares,

					     struct acpi_resource_gpio **agpio)

{

	return false;

}

static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev,

					   const char *name, int index)

{