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: Marek Vasut <marex@denx.de>
Cc: Markus Marb <markus@marb.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/can/ifi_canfd/ifi_canfd.c b/drivers/net/can/ifi_canfd/ifi_canfd.c
index 481895b2f9f4d5ed87f4df6621cfb51e67277046..c06ef438f23f1083040a318bd877ad17d40cd746 100644 (file)
--- a/drivers/net/can/ifi_canfd/ifi_canfd.c
+++ b/drivers/net/can/ifi_canfd/ifi_canfd.c
@@ -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,