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

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Date:	Wed, 01 Aug 2012 13:53:22 +0200
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	Fabio Baltieri <fabio.baltieri@...il.com>
CC:	linux-can@...r.kernel.org, linux-kernel@...r.kernel.org,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Wolfgang Grandegger <wg@...ndegger.com>
Subject: Re: [PATCH can-next v5 2/2] can: flexcan: add LED trigger support

On 08/01/2012 01:49 PM, Fabio Baltieri wrote:
> 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@...tkopp.net>
> Cc: Wolfgang Grandegger <wg@...ndegger.com>
> Cc: Marc Kleine-Budde <mkl@...gutronix.de>
> Signed-off-by: Fabio Baltieri <fabio.baltieri@...il.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);

Should the led blink on TX or TX completion interrupt?

>  		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);
>  
> 

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
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