| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | From 4c26434ac773e37f30ee5a8fa6f7275fe7dabac2 Mon Sep 17 00:00:00 2001 |
| 2 | From: Joakim Zhang <qiangqing.zhang@nxp.com> |
| 3 | Date: Fri, 12 Jul 2019 08:02:47 +0000 |
| 4 | Subject: [PATCH] can: flexcan: add CAN FD BRS support |
| 5 | |
| 6 | This patch adds CAN FD BitRate Switch (BRS) support to driver. |
| 7 | |
| 8 | Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com> |
| 9 | Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
| 10 | --- |
| 11 | drivers/net/can/flexcan.c | 9 ++++++++- |
| 12 | 1 file changed, 8 insertions(+), 1 deletion(-) |
| 13 | |
| 14 | --- a/drivers/net/can/flexcan.c |
| 15 | +++ b/drivers/net/can/flexcan.c |
| 16 | @@ -710,9 +710,13 @@ static netdev_tx_t flexcan_start_xmit(st |
| 17 | if (cfd->can_id & CAN_RTR_FLAG) |
| 18 | ctrl |= FLEXCAN_MB_CNT_RTR; |
| 19 | |
| 20 | - if (can_is_canfd_skb(skb)) |
| 21 | + if (can_is_canfd_skb(skb)) { |
| 22 | ctrl |= FLEXCAN_MB_CNT_EDL; |
| 23 | |
| 24 | + if (cfd->flags & CANFD_BRS) |
| 25 | + ctrl |= FLEXCAN_MB_CNT_BRS; |
| 26 | + } |
| 27 | + |
| 28 | for (i = 0; i < cfd->len; i += sizeof(u32)) { |
| 29 | data = be32_to_cpup((__be32 *)&cfd->data[i]); |
| 30 | priv->write(data, &priv->tx_mb->data[i / sizeof(u32)]); |
| 31 | @@ -943,6 +947,9 @@ static struct sk_buff *flexcan_mailbox_r |
| 32 | |
| 33 | if (reg_ctrl & FLEXCAN_MB_CNT_EDL) { |
| 34 | cfd->len = can_dlc2len(get_canfd_dlc((reg_ctrl >> 16) & 0xf)); |
| 35 | + |
| 36 | + if (reg_ctrl & FLEXCAN_MB_CNT_BRS) |
| 37 | + cfd->flags |= CANFD_BRS; |
| 38 | } else { |
| 39 | cfd->len = get_can_dlc((reg_ctrl >> 16) & 0xf); |
| 40 | |