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authorFabio Baltieri <fabio.baltieri@gmail.com>2012-12-18 18:50:55 +0100
committerMarc Kleine-Budde <mkl@pengutronix.de>2013-01-26 16:58:59 +0100
commit996a953de02ffb852c9ac736f4e892008ed68884 (patch)
treedcf301c575ee47331f34c961c36f5658ce32da32 /include/linux/can/dev.h
parent0024d8ad1639e32d717445c69ca813fd19c2a91c (diff)
can: add tx/rx LED trigger support
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: Fabio Baltieri <fabio.baltieri@gmail.com> Acked-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'include/linux/can/dev.h')
-rw-r--r--include/linux/can/dev.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
index 2b2fc345afc..7747d9bcdc8 100644
--- a/include/linux/can/dev.h
+++ b/include/linux/can/dev.h
@@ -16,6 +16,7 @@
#include <linux/can.h>
#include <linux/can/netlink.h>
#include <linux/can/error.h>
+#include <linux/can/led.h>
/*
* CAN mode
@@ -52,6 +53,13 @@ struct can_priv {
unsigned int echo_skb_max;
struct sk_buff **echo_skb;
+
+#ifdef CONFIG_CAN_LEDS
+ struct led_trigger *tx_led_trig;
+ char tx_led_trig_name[CAN_LED_NAME_SZ];
+ struct led_trigger *rx_led_trig;
+ char rx_led_trig_name[CAN_LED_NAME_SZ];
+#endif
};
/*