can: at91_can: add listen only mode
This patch adds listen only mode support to the at91_can driver.
Signed-off-by: Yoann DI-RUZZA <ydiruzza@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 6efe274..1d00b95 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -420,7 +420,11 @@
at91_transceiver_switch(priv, 1);
/* enable chip */
- at91_write(priv, AT91_MR, AT91_MR_CANEN);
+ if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
+ reg_mr = AT91_MR_CANEN | AT91_MR_ABM;
+ else
+ reg_mr = AT91_MR_CANEN;
+ at91_write(priv, AT91_MR, reg_mr);
priv->can.state = CAN_STATE_ERROR_ACTIVE;
@@ -1341,7 +1345,8 @@
priv->can.bittiming_const = &at91_bittiming_const;
priv->can.do_set_mode = at91_set_mode;
priv->can.do_get_berr_counter = at91_get_berr_counter;
- priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
+ priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES |
+ CAN_CTRLMODE_LISTENONLY;
priv->dev = dev;
priv->reg_base = addr;
priv->devtype_data = *devtype_data;