[PATCH 2/9] can: flexcan: add LED trigger support

From: Fabio Baltieri
Date: Sun Dec 16 2012 - 06:11:38 EST


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 <socketcan@xxxxxxxxxxxx>
Cc: Wolfgang Grandegger <wg@xxxxxxxxxxxxxx>
Cc: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Fabio Baltieri <fabio.baltieri@xxxxxxxxx>
---
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 0289a6d..769d29e 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>
@@ -564,6 +565,8 @@ 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;
}

@@ -652,6 +655,7 @@ 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);
}
@@ -865,6 +869,9 @@ 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);

@@ -893,6 +900,8 @@ static int flexcan_close(struct net_device *dev)

close_candev(dev);

+ can_led_event(dev, CAN_LED_EVENT_STOP);
+
return 0;
}

@@ -1092,6 +1101,8 @@ static int 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);

--
1.7.12.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/