From 4c26434ac773e37f30ee5a8fa6f7275fe7dabac2 Mon Sep 17 00:00:00 2001 From: Joakim Zhang Date: Fri, 12 Jul 2019 08:02:47 +0000 Subject: [PATCH] can: flexcan: add CAN FD BRS support This patch adds CAN FD BitRate Switch (BRS) support to driver. Signed-off-by: Joakim Zhang Signed-off-by: Marc Kleine-Budde --- drivers/net/can/flexcan.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -710,9 +710,13 @@ static netdev_tx_t flexcan_start_xmit(st 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)]); @@ -943,6 +947,9 @@ static struct sk_buff *flexcan_mailbox_r 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);