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From 4c26434ac773e37f30ee5a8fa6f7275fe7dabac2 Mon Sep 17 00:00:00 2001
From: Joakim Zhang <qiangqing.zhang@nxp.com>
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 <qiangqing.zhang@nxp.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
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);
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