[PATCH 08/10] can: grcan: Add saving and restoring of CAN FD baud-rate registers
From: Arun Muthusamy <hidden>
Date: 2025-11-18 09:21:38
Also in:
linux-can, lkml
Subsystem:
can network drivers, the rest · Maintainers:
Marc Kleine-Budde, Vincent Mailhol, Linus Torvalds
From: Daniel Hellstrom <redacted> While reset the GRCAN baud-rates are preserved, since GRCANFD has the baud-rate in different registers we need to add saving of those registers too. Signed-off-by: Arun Muthusamy <redacted> Signed-off-by: Daniel Hellstrom <redacted> --- drivers/net/can/grcan.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/net/can/grcan.c b/drivers/net/can/grcan.c
index 51a10fae2faf..b0e2367fb163 100644
--- a/drivers/net/can/grcan.c
+++ b/drivers/net/can/grcan.c@@ -589,9 +589,19 @@ static void grcan_reset(struct net_device *dev) struct grcan_priv *priv = netdev_priv(dev); struct grcan_registers __iomem *regs = priv->regs; u32 config = grcan_read_reg(®s->conf); + u32 nbtr, fdbtr; + + if (priv->hwcap->fd) { + nbtr = grcan_read_reg(®s->nbtr); + fdbtr = grcan_read_reg(®s->fdbtr); + } grcan_set_bits(®s->ctrl, GRCAN_CTRL_RESET); grcan_write_reg(®s->conf, config); + if (priv->hwcap->fd) { + grcan_write_reg(®s->nbtr, nbtr); + grcan_write_reg(®s->fdbtr, fdbtr); + } priv->eskbp = grcan_read_reg(®s->txrd); priv->can.state = CAN_STATE_STOPPED; --
2.51.0