• Fabio Baltieri's avatar
    can: add tx/rx LED trigger support · 996a953d
    Fabio Baltieri authored
    This patch implements the functions to add two LED triggers, named
    <ifname>-tx and <ifname>-rx, to a canbus device driver.
    
    Triggers are called from specific handlers by each CAN device driver and
    can be disabled altogether with a Kconfig option.
    
    The implementation keeps the LED on when the interface is UP and blinks
    the LED on network activity at a configurable rate.
    
    This only supports can-dev based drivers, as it uses some support field
    in the can_priv structure.
    
    Supported drivers should call devm_can_led_init() and can_led_event() as
    needed.
    
    Cleanup is handled automatically by devres, so no *_exit function is
    needed.
    
    Supported events are:
    - CAN_LED_EVENT_OPEN: turn on tx/rx LEDs
    - CAN_LED_EVENT_STOP: turn off tx/rx LEDs
    - CAN_LED_EVENT_TX: trigger tx LED blink
    - CAN_LED_EVENT_RX: trigger tx LED blink
    
    Cc: Wolfgang Grandegger <wg@grandegger.com>
    Cc: Marc Kleine-Budde <mkl@pengutronix.de>
    Signed-off-by: default avatarFabio Baltieri <fabio.baltieri@gmail.com>
    Acked-by: default avatarOliver Hartkopp <socketcan@hartkopp.net>
    Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
    996a953d
led.c 2.34 KB