On 03/13/2015 04:16 PM, yegorslists@googlemail.com wrote:
> From: Yegor Yefremov <yegorslists@googlemail.com>
> 
> Add <ifname>-rxtx trigger, that will be activated both for tx
> as rx events. This trigger mimics "activity" LED for Ethernet
> devices.
> 
> Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
> ---
>  drivers/net/can/led.c   |   14 ++++++++++++--
>  include/linux/can/dev.h |    2 ++
>  include/linux/can/led.h |    2 +-
>  3 files changed, 15 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/can/led.c b/drivers/net/can/led.c
> index ab7f1b0..56d940a 100644
> --- a/drivers/net/can/led.c
> +++ b/drivers/net/can/led.c
> @@ -36,14 +36,20 @@ void can_led_event(struct net_device *netdev, enum can_led_event event)
>  		led_trigger_event(priv->rx_led_trig, LED_OFF);
>  		break;
>  	case CAN_LED_EVENT_TX:
> -		if (led_delay)
> +		if (led_delay) {
>  			led_trigger_blink_oneshot(priv->tx_led_trig,
>  						  &led_delay, &led_delay, 1);
> +			led_trigger_blink_oneshot(priv->rxtx_led_trig,
> +						  &led_delay, &led_delay, 1);
> +		}
>  		break;
>  	case CAN_LED_EVENT_RX:
> -		if (led_delay)
> +		if (led_delay) {
>  			led_trigger_blink_oneshot(priv->rx_led_trig,
>  						  &led_delay, &led_delay, 1);
> +			led_trigger_blink_oneshot(priv->rxtx_led_trig,
> +						  &led_delay, &led_delay, 1);
> +		}
>  		break;
>  	}
>  }
> @@ -76,11 +82,15 @@ void devm_can_led_init(struct net_device *netdev)
>  		 "%s-tx", netdev->name);
>  	snprintf(priv->rx_led_trig_name, sizeof(priv->rx_led_trig_name),
>  		 "%s-rx", netdev->name);
> +	snprintf(priv->rxtx_led_trig_name, sizeof(priv->rxtx_led_trig_name),
> +		 "%s-rxtx", netdev->name);
>  
>  	led_trigger_register_simple(priv->tx_led_trig_name,
>  				    &priv->tx_led_trig);
>  	led_trigger_register_simple(priv->rx_led_trig_name,
>  				    &priv->rx_led_trig);
> +	led_trigger_register_simple(priv->rxtx_led_trig_name,
> +				    &priv->rxtx_led_trig);
>  
>  	devres_add(&netdev->dev, res);
>  }
> diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
> index c05ff0f..c3a9c8f 100644
> --- a/include/linux/can/dev.h
> +++ b/include/linux/can/dev.h
> @@ -61,6 +61,8 @@ struct can_priv {
>  	char tx_led_trig_name[CAN_LED_NAME_SZ];
>  	struct led_trigger *rx_led_trig;
>  	char rx_led_trig_name[CAN_LED_NAME_SZ];
> +	struct led_trigger *rxtx_led_trig;
> +	char rxtx_led_trig_name[CAN_LED_NAME_SZ];
>  #endif
>  };
>  
> diff --git a/include/linux/can/led.h b/include/linux/can/led.h
> index e0475c5..c60f542 100644
> --- a/include/linux/can/led.h
> +++ b/include/linux/can/led.h
> @@ -22,7 +22,7 @@ enum can_led_event {
>  #ifdef CONFIG_CAN_LEDS
>  
>  /* keep space for interface name + "-tx"/"-rx" suffix and null terminator */
                                      ^^^^^^^^^^^
Nitpick: can you update the comment.

> -#define CAN_LED_NAME_SZ (IFNAMSIZ + 4)
> +#define CAN_LED_NAME_SZ (IFNAMSIZ + 6)
>  
>  void can_led_event(struct net_device *netdev, enum can_led_event event);
>  void devm_can_led_init(struct net_device *netdev);
> 

Marc

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