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| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2013-01-28 16:23:10 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-01-29 11:47:06 +0100 |
| commit | 0d1c28a449c6c23a126e3a08ee30914609aac227 (patch) | |
| tree | 30995ef0e73b540d0eeb3fb0321e7baa8bcb01cf /include/linux/acpi_gpio.h | |
| parent | b42748c970d1865685749960cb23f08e259a9f86 (diff) | |
| download | linux-0d1c28a449c6c23a126e3a08ee30914609aac227.tar.gz linux-0d1c28a449c6c23a126e3a08ee30914609aac227.tar.bz2 linux-0d1c28a449c6c23a126e3a08ee30914609aac227.zip | |
gpiolib-acpi: Add ACPI5 event model support to gpio.
Add ability to handle ACPI events signalled by GPIO interrupts.
ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
handled by ACPI event methods which need to be called from the GPIO
controller's interrupt handler. acpi_gpio_request_interrupt() finds out which
gpio pins have acpi event methods and assigns interrupt handlers that calls
the acpi event methods for those pins.
Partially based on work by Rui Zhang <rui.zhang@intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/acpi_gpio.h')
| -rw-r--r-- | include/linux/acpi_gpio.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/acpi_gpio.h b/include/linux/acpi_gpio.h index 91615a389b65..b76ebd08ff8e 100644 --- a/include/linux/acpi_gpio.h +++ b/include/linux/acpi_gpio.h @@ -2,10 +2,12 @@ #define _LINUX_ACPI_GPIO_H_ #include <linux/errno.h> +#include <linux/gpio.h> #ifdef CONFIG_GPIO_ACPI int acpi_get_gpio(char *path, int pin); +void acpi_gpiochip_request_interrupts(struct gpio_chip *chip); #else /* CONFIG_GPIO_ACPI */ @@ -14,6 +16,8 @@ static inline int acpi_get_gpio(char *path, int pin) return -ENODEV; } +static inline void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { } + #endif /* CONFIG_GPIO_ACPI */ #endif /* _LINUX_ACPI_GPIO_H_ */ |