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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>
Link: https://lore.kernel.org/r/20190712075926.7357-5-qiangqing.zhang@nxp.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Joakim Zhang 2019-07-12 08:02:47 +00:00 committed by Marc Kleine-Budde
parent ce885a192f
commit 0542920c3f
1 changed files with 8 additions and 1 deletions
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9
drivers/net/can/flexcan.c
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@ -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);