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Commit 5e01a9f9 authored by Marek Vasut's avatar Marek Vasut Committed by Greg Kroah-Hartman
Browse files

can: ifi: Fix transmitter delay calculation 



commit 4f7116757b4bd99e4ef2636c7d957a6d63035d11 upstream.

The CANFD transmitter delay calculation formula was updated in the
latest software drop from IFI and improves the behavior of the IFI
CANFD core during bitrate switching. Use the new formula to improve
stability of the CANFD operation.

Signed-off-by: default avatarMarek Vasut <marex@denx.de>
Cc: Markus Marb <markus@marb.org>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f45c1b09

drivers/net/can/ifi_canfd/ifi_canfd.c

+3 −3
Original line number Diff line number Diff line
@@ -670,9 +670,9 @@ static void ifi_canfd_set_bittiming(struct net_device *ndev) 
	       priv->base + IFI_CANFD_FTIME);



	/* Configure transmitter delay */

	tdc = (dbt->brp * (dbt->phase_seg1 + 1)) & IFI_CANFD_TDELAY_MASK;

	writel(IFI_CANFD_TDELAY_EN | IFI_CANFD_TDELAY_ABS | tdc,

	       priv->base + IFI_CANFD_TDELAY);

	tdc = dbt->brp * (dbt->prop_seg + dbt->phase_seg1);

	tdc &= IFI_CANFD_TDELAY_MASK;

	writel(IFI_CANFD_TDELAY_EN | tdc, priv->base + IFI_CANFD_TDELAY);

}



static void ifi_canfd_set_filter(struct net_device *ndev, const u32 id,