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From: Marc Kleine-Budde <mkl@pengutronix.de>
To: linux-can@vger.kernel.org
Cc: kernel@pengutronix.de, michael@walle.cc, qiangqing.zhang@nxp.com,
	Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH 17/20] can: flexcan: add CAN FD BRS support
Date: Tue, 22 Sep 2020 16:44:26 +0200	[thread overview]
Message-ID: <20200922144429.2613631-18-mkl@pengutronix.de> (raw)
In-Reply-To: <20200922144429.2613631-1-mkl@pengutronix.de>

From: Joakim Zhang <qiangqing.zhang@nxp.com>

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>
---
 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 e3ecce80eadb..fc0e9d5fd02b 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -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);
 
-- 
2.28.0


  parent reply	other threads:[~2020-09-22 14:44 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-22 14:44 [RFC]: flexcan FD support - can-next 2020-09-22 Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 01/20] can: flexcan: sort include files alphabetically Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 02/20] can: flexcan: flexcan_exit_stop_mode(): remove stray empty line Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 03/20] can: flexcan: more register names Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 04/20] can: flexcan: struct flexcan_regs: document registers not affected by soft reset Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 05/20] can: flexcan: quirks: get rid of long lines Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 06/20] can: flexcan: Ack wakeup interrupt separately Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 07/20] can: flexcan: flexcan_probe(): make regulator xceiver optional Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 08/20] can: flexcan: Add check for transceiver maximum bitrate limitation Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 09/20] can: flexcan: add correctable errors correction when HW supports ECC Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 10/20] can: flexcan: flexcan_chip_stop(): add error handling and propagate error value Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 11/20] can: flexcan: disable clocks during stop mode Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 12/20] can: flexcan: add LPSR mode support Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 13/20] can: flexcan: flexcan_set_bittiming(): move setup of CAN-2.0 bitiming into separate function Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 14/20] can: flexcan: use struct canfd_frame for CAN classic frame Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 15/20] can: flexcan: add CAN-FD mode support Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 16/20] can: flexcan: add ISO CAN FD feature support Marc Kleine-Budde
2020-09-22 14:44 ` Marc Kleine-Budde [this message]
2020-09-22 14:44 ` [PATCH 18/20] can: flexcan: add Transceiver Delay Compensation support Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 19/20] can: flexcan: add imx8qm support Marc Kleine-Budde
2020-09-22 14:44 ` [PATCH 20/20] can: flexcan: add lx2160ar1 support Marc Kleine-Budde
2020-09-23  7:45   ` Michael Walle
2020-09-23  7:54     ` Marc Kleine-Budde
2020-09-23  8:02       ` Michael Walle
2020-09-23  8:10         ` Marc Kleine-Budde
2020-09-23  8:31           ` Joakim Zhang
2020-09-23  8:58             ` Marc Kleine-Budde
2020-09-23  9:38               ` Michael Walle
2020-09-23  9:50               ` Joakim Zhang
2020-09-23  8:53 pull-request: can-next 2020-09-23 Marc Kleine-Budde
2020-09-23  8:54 ` [PATCH 17/20] can: flexcan: add CAN FD BRS support Marc Kleine-Budde

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