net/can/mscan: add listen only mode

This patch adds listen only mode to the mscan controller.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c
index ec4a311..74f3b18 100644 (file)
--- a/drivers/net/can/mscan/mscan.c
+++ b/drivers/net/can/mscan/mscan.c
@@ -581,7 +581,10 @@ static int mscan_open(struct net_device *dev)
 
        priv->open_time = jiffies;
 
-       clrbits8(&regs->canctl1, MSCAN_LISTEN);
+       if (ctrlmode.flags & CAN_CTRLMODE_LISTENONLY)
+               setbits8(&regs->canctl1, MSCAN_LISTEN);
+       else
+               clrbits8(&regs->canctl1, MSCAN_LISTEN);
 
        ret = mscan_start(dev);
        if (ret)
@@ -690,7 +693,8 @@ struct net_device *alloc_mscandev(void)
        priv->can.bittiming_const = &mscan_bittiming_const;
        priv->can.do_set_bittiming = mscan_do_set_bittiming;
        priv->can.do_set_mode = mscan_do_set_mode;
-       priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
+       priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES |
+               CAN_CTRLMODE_LISTENONLY;
 
        for (i = 0; i < TX_QUEUE_SIZE; i++) {
                priv->tx_queue[i].id = i;