diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/misc/led.h | 10 | ||||
| -rw-r--r-- | include/hw/qdev-core.h | 16 |
2 files changed, 26 insertions, 0 deletions
diff --git a/include/hw/misc/led.h b/include/hw/misc/led.h index 286d37c75c..aa359b87c2 100644 --- a/include/hw/misc/led.h +++ b/include/hw/misc/led.h @@ -9,6 +9,7 @@ #define HW_MISC_LED_H #include "qom/object.h" +#include "hw/qdev-core.h" #define TYPE_LED "led" @@ -37,10 +38,17 @@ struct LEDState { /* Public */ uint8_t intensity_percent; + qemu_irq irq; /* Properties */ char *description; char *color; + /* + * Determines whether a GPIO is using a positive (active-high) + * logic (when used with GPIO, the intensity at reset is related + * to the GPIO polarity). + */ + bool gpio_active_high; }; typedef struct LEDState LEDState; DECLARE_INSTANCE_CHECKER(LEDState, LED, TYPE_LED) @@ -72,6 +80,7 @@ void led_set_state(LEDState *s, bool is_emitting); /** * led_create_simple: Create and realize a LED device * @parentobj: the parent object + * @gpio_polarity: GPIO polarity * @color: color of the LED * @description: description of the LED (optional) * @@ -81,6 +90,7 @@ void led_set_state(LEDState *s, bool is_emitting); * Returns: The newly allocated and instantiated LED object. */ LEDState *led_create_simple(Object *parentobj, + GpioPolarity gpio_polarity, LEDColor color, const char *description); diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index 868973319e..a653295d6f 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -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) |