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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>
This commit is contained in:
Marc Kleine-Budde 2014-02-28 15:16:59 +01:00
parent d96e43e8fc
commit 4b5b82274a
1 changed files with 17 additions and 9 deletions
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26
drivers/net/can/flexcan.c
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@ -363,6 +363,21 @@ static int flexcan_chip_unfreeze(struct flexcan_priv *priv)
return 0; 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, &regs->mcr);
while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_SOFTRST))
usleep_range(10, 20);
if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_SOFTRST)
return -ETIMEDOUT;
return 0;
}
static int flexcan_get_berr_counter(const struct net_device *dev, static int flexcan_get_berr_counter(const struct net_device *dev,
struct can_berr_counter *bec) struct can_berr_counter *bec)
{ {
@ -786,16 +801,9 @@ static int flexcan_chip_start(struct net_device *dev)
return err; return err;
/* soft reset */ /* soft reset */
flexcan_write(FLEXCAN_MCR_SOFTRST, &regs->mcr); err = flexcan_chip_softreset(priv);
udelay(10); if (err)
reg_mcr = flexcan_read(&regs->mcr);
if (reg_mcr & FLEXCAN_MCR_SOFTRST) {
netdev_err(dev, "Failed to softreset can module (mcr=0x%08x)\n",
reg_mcr);
err = -ENODEV;
goto out_chip_disable; goto out_chip_disable;
}
flexcan_set_bittiming(dev); flexcan_set_bittiming(dev);