linux-kernel - [PATCH v3 12/15] can: grcan: Advertise CANFD capability

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Message-ID: <20260122121038.7910-13-arun.muthusamy@gaisler.com>
Date: Thu, 22 Jan 2026 13:10:35 +0100
From: Arun Muthusamy <arun.muthusamy@...sler.com>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	mkl@...gutronix.de,
	mailhol@...nel.org
Cc: devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-can@...r.kernel.org,
	Arun Muthusamy <arun.muthusamy@...sler.com>
Subject: [PATCH v3 12/15] can: grcan: Advertise CANFD capability

Advertise CANFD capability for GRCANFD hardware by enabling
CAN_CTRLMODE_FD flag and providing CANFD timing operations.

Signed-off-by: Arun Muthusamy <arun.muthusamy@...sler.com>
---
 drivers/net/can/grcan.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/can/grcan.c b/drivers/net/can/grcan.c
index e99a8c2bffc6..9fc18064fab1 100644
--- a/drivers/net/can/grcan.c
+++ b/drivers/net/can/grcan.c
@@ -1656,11 +1656,14 @@ static int grcan_setup_netdev(struct platform_device *ofdev,
 	priv->ofdev_dev = &ofdev->dev;
 	priv->regs = base;
 	priv->can.bittiming_const = hwcap->bt_const;
+	priv->can.fd.data_bittiming_const = hwcap->bt_const;
 	priv->can.do_set_mode = grcan_set_mode;
 	priv->can.do_get_berr_counter = grcan_get_berr_counter;
 	priv->can.clock.freq = ambafreq;
 	priv->can.ctrlmode_supported =
 		CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_ONE_SHOT;
+	if (hwcap->fd)
+		priv->can.ctrlmode_supported |= CAN_CTRLMODE_FD;
 	priv->need_txbug_workaround = txbug;
 	priv->hwcap = hwcap;
 
-- 
2.51.0