diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2020-09-22 17:44:22 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2020-09-22 17:52:51 +0300 |
| commit | 890599bc8618b72ba5e061d6c776cc8dce08c753 (patch) | |
| tree | c0ec408f4b1533713f822960d58aaeb1bf0a23f8 /drivers/net/can/flexcan.c | |
| parent | 1434d04349626d7b4da49b99f79d6391b9a67f16 (diff) | |
| download | linux-890599bc8618b72ba5e061d6c776cc8dce08c753.tar.xz | |
can: flexcan: flexcan_set_bittiming(): move setup of CAN-2.0 bitiming into separate function
This is a patch prepares for the CAN-FD support. In a later patch the
setup for canfd bittiming will be added, with this patch the change is
easier to read.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20200922144429.2613631-14-mkl@pengutronix.de
Diffstat (limited to 'drivers/net/can/flexcan.c')
| -rw-r--r-- | drivers/net/can/flexcan.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index 35d0fa59e957..a9908deae411 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -1037,7 +1037,7 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id) return handled; } -static void flexcan_set_bittiming(struct net_device *dev) +static void flexcan_set_bittiming_ctrl(const struct net_device *dev) { const struct flexcan_priv *priv = netdev_priv(dev); const struct can_bittiming *bt = &priv->can.bittiming; @@ -1049,10 +1049,7 @@ static void flexcan_set_bittiming(struct net_device *dev) FLEXCAN_CTRL_RJW(0x3) | FLEXCAN_CTRL_PSEG1(0x7) | FLEXCAN_CTRL_PSEG2(0x7) | - FLEXCAN_CTRL_PROPSEG(0x7) | - FLEXCAN_CTRL_LPB | - FLEXCAN_CTRL_SMP | - FLEXCAN_CTRL_LOM); + FLEXCAN_CTRL_PROPSEG(0x7)); reg |= FLEXCAN_CTRL_PRESDIV(bt->brp - 1) | FLEXCAN_CTRL_PSEG1(bt->phase_seg1 - 1) | @@ -1060,6 +1057,24 @@ static void flexcan_set_bittiming(struct net_device *dev) FLEXCAN_CTRL_RJW(bt->sjw - 1) | FLEXCAN_CTRL_PROPSEG(bt->prop_seg - 1); + netdev_dbg(dev, "writing ctrl=0x%08x\n", reg); + priv->write(reg, ®s->ctrl); + + /* print chip status */ + netdev_dbg(dev, "%s: mcr=0x%08x ctrl=0x%08x\n", __func__, + priv->read(®s->mcr), priv->read(®s->ctrl)); +} + +static void flexcan_set_bittiming(struct net_device *dev) +{ + const struct flexcan_priv *priv = netdev_priv(dev); + struct flexcan_regs __iomem *regs = priv->regs; + u32 reg; + + reg = priv->read(®s->ctrl); + reg &= ~(FLEXCAN_CTRL_LPB | FLEXCAN_CTRL_SMP | + FLEXCAN_CTRL_LOM); + if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) reg |= FLEXCAN_CTRL_LPB; if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) @@ -1070,9 +1085,7 @@ static void flexcan_set_bittiming(struct net_device *dev) netdev_dbg(dev, "writing ctrl=0x%08x\n", reg); priv->write(reg, ®s->ctrl); - /* print chip status */ - netdev_dbg(dev, "%s: mcr=0x%08x ctrl=0x%08x\n", __func__, - priv->read(®s->mcr), priv->read(®s->ctrl)); + return flexcan_set_bittiming_ctrl(dev); } /* flexcan_chip_start |