4.9-stable review patch. If anyone has any objections, please let me know.
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From: Marek Vasut marex@denx.de
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
--- drivers/net/can/ifi_canfd/ifi_canfd.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- 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(stru 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,