can: add combined rx/tx LED trigger support

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>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

2 files changed, 6 insertions, 2 deletions

diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
index c05ff0f9f9a5..c3a9c8fc60fa 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 e0475c5cbb92..146de4506d21 100644
--- a/include/linux/can/led.h
+++ b/include/linux/can/led.h
@@ -21,8 +21,10 @@ enum can_led_event {
 
 #ifdef CONFIG_CAN_LEDS
 
-/* keep space for interface name + "-tx"/"-rx" suffix and null terminator */
-#define CAN_LED_NAME_SZ (IFNAMSIZ + 4)
+/* keep space for interface name + "-tx"/"-rx"/"-rxtx"
+ * suffix and null terminator
+ */
+#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);