linux_dsm_epyc7002/include/linux/acpi_gpio.h
Mathias Nyman e29482e848 gpio / ACPI: add ACPI support
Add support for translating ACPI GPIO pin numbers to Linux GPIO API pins.
Needs a gpio controller driver with the acpi handler hook set.

Drivers can use acpi_get_gpio() to translate ACPI5 GpioIO and GpioInt
resources to Linux GPIO's.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-30 12:37:36 +01:00

20 lines
318 B
C

#ifndef _LINUX_ACPI_GPIO_H_
#define _LINUX_ACPI_GPIO_H_
#include <linux/errno.h>
#ifdef CONFIG_GPIO_ACPI
int acpi_get_gpio(char *path, int pin);
#else /* CONFIG_GPIO_ACPI */
static inline int acpi_get_gpio(char *path, int pin)
{
return -ENODEV;
}
#endif /* CONFIG_GPIO_ACPI */
#endif /* _LINUX_ACPI_GPIO_H_ */