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Date: Fri, 10 May 2019 10:50:08 +0000 From: Joakim Zhang <qiangqing.zhang@....com> To: "mkl@...gutronix.de" <mkl@...gutronix.de>, "linux-can@...r.kernel.org" <linux-can@...r.kernel.org> CC: dl-linux-imx <linux-imx@....com>, "wg@...ndegger.com" <wg@...ndegger.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, Stefan-gabriel Mirea <stefan-gabriel.mirea@....com>, Aisheng Dong <aisheng.dong@....com>, Joakim Zhang <qiangqing.zhang@....com> Subject: [PATCH V3 5/7] can: flexcan: add CANFD BRS support From: Dong Aisheng <aisheng.dong@....com> This patch intends to add CAN FD BitRate Switch(BRS) support in driver. Signed-off-by: Joakim Zhang <qiangqing.zhang@....com> Signed-off-by: Dong Aisheng <aisheng.dong@....com> ChangeLog: ---------- V2->V3: *split from another patch --- 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 c45c92948195..ca7240d69042 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -687,8 +687,12 @@ static netdev_tx_t flexcan_start_xmit(struct sk_buff *skb, struct net_device *de ctrl |= FLEXCAN_MB_CNT_RTR; if (priv->can.ctrlmode & CAN_CTRLMODE_FD) { - if (can_is_canfd_skb(skb)) + if (can_is_canfd_skb(skb)) { ctrl |= FLEXCAN_MB_CNT_EDL; + + if (cf->flags & CANFD_BRS) + ctrl |= FLEXCAN_MB_CNT_BRS; + } } for (i = 0; i < cf->len; i += sizeof(u32)) { @@ -909,6 +913,9 @@ static unsigned int flexcan_mailbox_read(struct can_rx_offload *offload, bool dr if (reg_ctrl & FLEXCAN_MB_CNT_EDL) { cf->len = can_dlc2len((reg_ctrl >> 16) & 0x0F); + + if (reg_ctrl & FLEXCAN_MB_CNT_BRS) + cf->flags |= CANFD_BRS; } else { cf->len = get_can_dlc((reg_ctrl >> 16) & 0x0F); -- 2.17.1
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