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can: mcp251x: add LED trigger support 

Add support for canbus activity led indicators on mcp251x devices by
calling appropriate can_led functions.

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

Cc: Christian Pellegrin <chripell@fsfe.org>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Fabio Baltieri 2012-12-18 18:51:02 +01:00 committed by Marc Kleine-Budde
parent 5090f80560
commit eb072a9bae
1 changed files with 19 additions and 4 deletions
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23
drivers/net/can/mcp251x.c
View File

@ -60,6 +60,7 @@
#include <linux/can/core.h> #include <linux/can/core.h>
#include <linux/can/dev.h> #include <linux/can/dev.h>
#include <linux/can/led.h>
#include <linux/can/platform/mcp251x.h> #include <linux/can/platform/mcp251x.h>
#include <linux/completion.h> #include <linux/completion.h>
#include <linux/delay.h> #include <linux/delay.h>
@ -494,6 +495,9 @@ static void mcp251x_hw_rx(struct spi_device *spi, int buf_idx)
priv->net->stats.rx_packets++; priv->net->stats.rx_packets++;
priv->net->stats.rx_bytes += frame->can_dlc; priv->net->stats.rx_bytes += frame->can_dlc;
can_led_event(priv->net, CAN_LED_EVENT_RX);
netif_rx_ni(skb); netif_rx_ni(skb);
} }
@ -707,6 +711,8 @@ static int mcp251x_stop(struct net_device *net)
mutex_unlock(&priv->mcp_lock); mutex_unlock(&priv->mcp_lock);
can_led_event(net, CAN_LED_EVENT_STOP);
return 0; return 0;
} }
@ -905,6 +911,7 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id)
if (intf & CANINTF_TX) { if (intf & CANINTF_TX) {
net->stats.tx_packets++; net->stats.tx_packets++;
net->stats.tx_bytes += priv->tx_len - 1; net->stats.tx_bytes += priv->tx_len - 1;
can_led_event(net, CAN_LED_EVENT_TX);
if (priv->tx_len) { if (priv->tx_len) {
can_get_echo_skb(net, 0); can_get_echo_skb(net, 0);
priv->tx_len = 0; priv->tx_len = 0;
@ -968,6 +975,9 @@ static int mcp251x_open(struct net_device *net)
mcp251x_open_clean(net); mcp251x_open_clean(net);
goto open_unlock; goto open_unlock;
} }
can_led_event(net, CAN_LED_EVENT_OPEN);
netif_wake_queue(net); netif_wake_queue(net);
open_unlock: open_unlock:
@ -1077,10 +1087,15 @@ static int mcp251x_can_probe(struct spi_device *spi)
pdata->transceiver_enable(0); pdata->transceiver_enable(0);
ret = register_candev(net); ret = register_candev(net);
if (!ret) { if (ret)
dev_info(&spi->dev, "probed\n"); goto error_probe;
return ret;
} devm_can_led_init(net);
dev_info(&spi->dev, "probed\n");
return ret;
error_probe: error_probe:
if (!mcp251x_enable_dma) if (!mcp251x_enable_dma)
kfree(priv->spi_rx_buf); kfree(priv->spi_rx_buf);