LED: Add LED trigger support

This patch allows to associate LEDs with certain triggers, such
as heartbeat or network activity.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 22 insertions, 6 deletions

diff --git a/net/eth.c b/net/eth.c
index a82a263206..7502e98253 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -77,6 +77,8 @@ int eth_send(void *packet, int length)
 		eth_current->active = 1;
 	}
 
+	led_trigger_network(LED_TRIGGER_NET_TX);
+
 	return eth_current->send(eth_current, packet, length);
 }
 
@@ -183,4 +185,8 @@ void eth_unregister(struct eth_device *edev)
 	list_del(&edev->list);
 }
 
-
+void led_trigger_network(enum led_trigger trigger)
+{
+	led_trigger(trigger, TRIGGER_FLASH);
+	led_trigger(LED_TRIGGER_NET_TXRX, TRIGGER_FLASH);
+}
diff --git a/net/net.c b/net/net.c
index a613d1da74..9b4ab8904c 100644
--- a/net/net.c
+++ b/net/net.c
@@ -628,19 +628,29 @@ int net_receive(unsigned char *pkt, int len)
 {
 	struct ethernet *et = (struct ethernet *)pkt;
 	int et_protlen = ntohs(et->et_protlen);
+	int ret;
 
-	if (len < ETHER_HDR_SIZE)
-		return 0;
+	led_trigger_network(LED_TRIGGER_NET_RX);
+
+	if (len < ETHER_HDR_SIZE) {
+		ret = 0;
+		goto out;
+	}
 
 	switch (et_protlen) {
 	case PROT_ARP:
-		return net_handle_arp(pkt, len);
+		ret = net_handle_arp(pkt, len);
+		break;
 	case PROT_IP:
-		return net_handle_ip(pkt, len);
+		ret = net_handle_ip(pkt, len);
+		break;
 	default:
 		debug("%s: got unknown protocol type: %d\n", __func__, et_protlen);
-		return 1;
+		ret = 1;
+		break;
 	}
+out:
+	return ret;
 }
 
 static int net_init(void)