From: Joakim Zhang <qiangqing.zhang@xxxxxxx> This patch adds CAN FD BitRate Switch (BRS) support to driver. Signed-off-by: Joakim Zhang <qiangqing.zhang@xxxxxxx> Link: https://lore.kernel.org/r/20190712075926.7357-5-qiangqing.zhang@xxxxxxx Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- 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 e3ecce80eadb..fc0e9d5fd02b 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -723,9 +723,13 @@ 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)]); @@ -956,6 +960,9 @@ static struct sk_buff *flexcan_mailbox_read(struct can_rx_offload *offload, if (reg_ctrl & FLEXCAN_MB_CNT_EDL) { cfd->len = can_dlc2len(get_canfd_dlc((reg_ctrl >> 16) & 0xf)); + + if (reg_ctrl & FLEXCAN_MB_CNT_BRS) + cfd->flags |= CANFD_BRS; } else { cfd->len = get_can_dlc((reg_ctrl >> 16) & 0xf); -- 2.28.0
