summaryrefslogtreecommitdiffstats
path: root/drivers/net/can
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2014-04-11 08:13:14 +0000
committerMarc Kleine-Budde <mkl@pengutronix.de>2014-04-24 22:08:57 +0200
commit6b48ff8d934ab5ca6697b0e311e7869ff4a1d3f3 (patch)
tree36fd150dc1ba195e2695341e93ebfeddc1393037 /drivers/net/can
parent1da394d889b4110bda954813ef32601c06118376 (diff)
downloadop-kernel-dev-6b48ff8d934ab5ca6697b0e311e7869ff4a1d3f3.zip
op-kernel-dev-6b48ff8d934ab5ca6697b0e311e7869ff4a1d3f3.tar.gz
can: c_can: Simplify buffer reenabling
Instead of writing to the message object we can simply clear the NewDat bit with the get method. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can')
-rw-r--r--drivers/net/can/c_can/c_can.c16
1 files changed, 6 insertions, 10 deletions
diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c
index 6170e64..2aae073 100644
--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can.c
@@ -108,6 +108,7 @@
#define IF_COMM_CONTROL BIT(4)
#define IF_COMM_CLR_INT_PND BIT(3)
#define IF_COMM_TXRQST BIT(2)
+#define IF_COMM_CLR_NEWDAT IF_COMM_TXRQST
#define IF_COMM_DATAA BIT(1)
#define IF_COMM_DATAB BIT(0)
#define IF_COMM_ALL (IF_COMM_MASK | IF_COMM_ARB | \
@@ -120,7 +121,7 @@
IF_COMM_DATAA | IF_COMM_DATAB)
/* For the high buffers we clear the interrupt bit and newdat */
-#define IF_COMM_RCV_HIGH (IF_COMM_RCV_LOW | IF_COMM_TXRQST)
+#define IF_COMM_RCV_HIGH (IF_COMM_RCV_LOW | IF_COMM_CLR_NEWDAT)
/* IFx arbitration */
#define IF_ARB_MSGVAL BIT(15)
@@ -353,17 +354,12 @@ static void c_can_write_msg_object(struct net_device *dev,
}
static inline void c_can_activate_all_lower_rx_msg_obj(struct net_device *dev,
- int iface,
- int ctrl_mask)
+ int iface)
{
int i;
- struct c_can_priv *priv = netdev_priv(dev);
- for (i = C_CAN_MSG_OBJ_RX_FIRST; i <= C_CAN_MSG_RX_LOW_LAST; i++) {
- priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface),
- ctrl_mask & ~IF_MCONT_NEWDAT);
- c_can_object_put(dev, iface, i, IF_COMM_CONTROL);
- }
+ for (i = C_CAN_MSG_OBJ_RX_FIRST; i <= C_CAN_MSG_RX_LOW_LAST; i++)
+ c_can_object_get(dev, iface, i, IF_COMM_CLR_NEWDAT);
}
static int c_can_handle_lost_msg_obj(struct net_device *dev,
@@ -829,7 +825,7 @@ static int c_can_read_objects(struct net_device *dev, struct c_can_priv *priv,
if (obj == C_CAN_MSG_RX_LOW_LAST)
/* activate all lower message objects */
- c_can_activate_all_lower_rx_msg_obj(dev, IF_RX, ctrl);
+ c_can_activate_all_lower_rx_msg_obj(dev, IF_RX);
pkts++;
quota--;
OpenPOWER on IntegriCloud