diff options
Diffstat (limited to 'include/hw/qdev-core.h')
| -rw-r--r-- | include/hw/qdev-core.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index 868973319e..5e737195b5 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -163,8 +163,8 @@ struct NamedClockList { /** * DeviceState: * @realized: Indicates whether the device has been fully constructed. - * When accessed outsize big qemu lock, must be accessed with - * atomic_load_acquire() + * When accessed outside big qemu lock, must be accessed with + * qatomic_load_acquire() * @reset: ResettableState for the device; handled by Resettable interface. * * This structure should not be accessed directly. We declare it here @@ -444,6 +444,22 @@ void qdev_machine_creation_done(void); bool qdev_machine_modified(void); /** + * GpioPolarity: Polarity of a GPIO line + * + * GPIO lines use either positive (active-high) logic, + * or negative (active-low) logic. + * + * In active-high logic (%GPIO_POLARITY_ACTIVE_HIGH), a pin is + * active when the voltage on the pin is high (relative to ground); + * whereas in active-low logic (%GPIO_POLARITY_ACTIVE_LOW), a pin + * is active when the voltage on the pin is low (or grounded). + */ +typedef enum { + GPIO_POLARITY_ACTIVE_LOW, + GPIO_POLARITY_ACTIVE_HIGH +} GpioPolarity; + +/** * qdev_get_gpio_in: Get one of a device's anonymous input GPIO lines * @dev: Device whose GPIO we want * @n: Number of the anonymous GPIO line (which must be in range) |