This patch intends to add CAN FD BitRate Switch(BRS) support in driver.
Signed-off-by: Joakim Zhang <qiangqing.zhang@xxxxxxx>
---
drivers/net/can/flexcan.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 23e9407e33ff..4956ef64944a 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -684,9 +684,13 @@ static netdev_tx_t flexcan_start_xmit(struct sk_buff *skb, struct net_device *de
if (cfd->can_id & CAN_RTR_FLAG)
ctrl |= FLEXCAN_MB_CNT_RTR;
- if (can_is_canfd_skb(skb))
+ if (can_is_canfd_skb(skb)) {
ctrl |= FLEXCAN_MB_CNT_EDL;
+ if (cfd->flags & CANFD_BRS)
+ ctrl |= FLEXCAN_MB_CNT_BRS;
+ }
+
for (i = 0; i < cfd->len; i += sizeof(u32)) {
data = be32_to_cpup((__be32 *)&cfd->data[i]);
priv->write(data, &priv->tx_mb->data[i / sizeof(u32)]);
@@ -907,6 +911,9 @@ static unsigned int flexcan_mailbox_read(struct can_rx_offload *offload, bool dr
if (reg_ctrl & FLEXCAN_MB_CNT_EDL) {
cfd->len = can_dlc2len(get_canfd_dlc((reg_ctrl >> 16) & 0x0F));
+
+ if (reg_ctrl & FLEXCAN_MB_CNT_BRS)
+ cfd->flags |= CANFD_BRS;
} else {
cfd->len = get_can_dlc((reg_ctrl >> 16) & 0x0F);
--
2.17.1
