diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2014-02-28 15:16:59 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2014-03-03 14:29:51 +0100 |
| commit | 4b5b82274a17f0ebbf02378df2ba7f36a3f5af19 (patch) | |
| tree | 8d698b9d91feb526f6e0389170aec62fbd4372d1 /drivers | |
| parent | d96e43e8fce28cf97df576a07af9d65657a41a6f (diff) | |
| download | linux-4b5b82274a17f0ebbf02378df2ba7f36a3f5af19.tar.bz2 | |
can: flexcan: factor out soft reset into seperate funtion
This patch moves the soft reset into a seperate function.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/can/flexcan.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index dff4fa472c3a..61376abdab39 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -363,6 +363,21 @@ static int flexcan_chip_unfreeze(struct flexcan_priv *priv) return 0; } +static int flexcan_chip_softreset(struct flexcan_priv *priv) +{ + struct flexcan_regs __iomem *regs = priv->base; + unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; + + flexcan_write(FLEXCAN_MCR_SOFTRST, ®s->mcr); + while (timeout-- && (flexcan_read(®s->mcr) & FLEXCAN_MCR_SOFTRST)) + usleep_range(10, 20); + + if (flexcan_read(®s->mcr) & FLEXCAN_MCR_SOFTRST) + return -ETIMEDOUT; + + return 0; +} + static int flexcan_get_berr_counter(const struct net_device *dev, struct can_berr_counter *bec) { @@ -786,16 +801,9 @@ static int flexcan_chip_start(struct net_device *dev) return err; /* soft reset */ - flexcan_write(FLEXCAN_MCR_SOFTRST, ®s->mcr); - udelay(10); - - reg_mcr = flexcan_read(®s->mcr); - if (reg_mcr & FLEXCAN_MCR_SOFTRST) { - netdev_err(dev, "Failed to softreset can module (mcr=0x%08x)\n", - reg_mcr); - err = -ENODEV; + err = flexcan_chip_softreset(priv); + if (err) goto out_chip_disable; - } flexcan_set_bittiming(dev); |