Add create_led_by_gpio_id() to easily connect a LED to a GPIO output. Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org> --- include/hw/misc/led.h | 14 ++++++++++++++ hw/misc/led.c | 20 ++++++++++++++++++++ 2 files changed, 34 insertions(+)
diff --git a/include/hw/misc/led.h b/include/hw/misc/led.h index 427ca1418e..58393c16de 100644 --- a/include/hw/misc/led.h +++ b/include/hw/misc/led.h @@ -27,4 +27,18 @@ typedef struct LEDState { uint8_t reset_state; /* TODO [GPIO_ACTIVE_LOW, GPIO_ACTIVE_HIGH] */ } LEDState; +/** + * create_led_by_gpio_id: create and LED device + * @parent: the parent object + * @gpio_dev: device exporting GPIOs + * @gpio_id: GPIO ID of this LED + * @name: name of the LED + * + * This utility function creates a LED and connects it to a + * GPIO exported by another device. + */ +DeviceState *create_led_by_gpio_id(Object *parentobj, + DeviceState *gpio_dev, unsigned gpio_id, + const char *led_name); + #endif /* HW_MISC_LED_H */ diff --git a/hw/misc/led.c b/hw/misc/led.c index 233843f581..27882e2f9d 100644 --- a/hw/misc/led.c +++ b/hw/misc/led.c @@ -86,3 +86,23 @@ static void led_register_types(void) } type_init(led_register_types) + +DeviceState *create_led_by_gpio_id(Object *parentobj, + DeviceState *gpio_dev, unsigned gpio_id, + const char *led_name) +{ + DeviceState *dev; + char *name; + + dev = qdev_create(NULL, TYPE_LED); + /* TODO set "reset_state" */ + qdev_prop_set_string(dev, "name", led_name); + name = g_ascii_strdown(led_name, -1); + name = g_strdelimit(name, " #", '-'); + object_property_add_child(parentobj, name, OBJECT(dev)); + g_free(name); + qdev_init_nofail(dev); + qdev_connect_gpio_out(gpio_dev, gpio_id, qdev_get_gpio_in(dev, 0)); + + return dev; +} -- 2.21.3