[PATCH can-next v5 2/2] can: flexcan: add LED trigger support

[Fabio Baltieri]

Add support for canbus activity led indicators on flexcan devices by
calling appropriate can_led_* functions.

These are only enabled when CONFIG_CAN_LEDS is Y, becomes no-op
otherwise.

Cc: Oliver Hartkopp <socket...@hartkopp.net>
Cc: Wolfgang Grandegger <w...@grandegger.com>
Cc: Marc Kleine-Budde <m...@pengutronix.de>
Signed-off-by: Fabio Baltieri <fabio.balti...@gmail.com>
---
 drivers/net/can/flexcan.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index c5f1431..6467fc1 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -23,6 +23,7 @@
 #include <linux/can.h>
 #include <linux/can/dev.h>
 #include <linux/can/error.h>
+#include <linux/can/led.h>
 #include <linux/can/platform/flexcan.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
@@ -547,6 +548,8 @@ static int flexcan_read_frame(struct net_device *dev)
        stats->rx_packets++;
        stats->rx_bytes += cf->can_dlc;
 
+       can_led_event(dev, CAN_LED_EVENT_RX);
+
        return 1;
 }
 
@@ -635,6 +638,7 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
        if (reg_iflag1 & (1 << FLEXCAN_TX_BUF_ID)) {
                stats->tx_bytes += can_get_echo_skb(dev, 0);
                stats->tx_packets++;
+               can_led_event(dev, CAN_LED_EVENT_TX);
                flexcan_write((1 << FLEXCAN_TX_BUF_ID), &regs->iflag1);
                netif_wake_queue(dev);
        }
@@ -844,6 +848,9 @@ static int flexcan_open(struct net_device *dev)
        err = flexcan_chip_start(dev);
        if (err)
                goto out_close;
+
+       can_led_event(dev, CAN_LED_EVENT_OPEN);
+
        napi_enable(&priv->napi);
        netif_start_queue(dev);
 
@@ -872,6 +879,8 @@ static int flexcan_close(struct net_device *dev)
 
        close_candev(dev);
 
+       can_led_event(dev, CAN_LED_EVENT_STOP);
+
        return 0;
 }
 
@@ -1068,6 +1077,8 @@ static int __devinit flexcan_probe(struct platform_device 
*pdev)
                goto failed_register;
        }
 
+       devm_can_led_init(dev);
+
        dev_info(&pdev->dev, "device registered (reg_base=%p, irq=%d)\n",
                 priv->base, dev->irq);
 
-- 
1.7.11.rc1.9.gf623ca1.dirty

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