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EMAC driver: define MDC_CLK=2.5MHz and caculate mdc_div according to SCLK.

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Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bryan Wu 2008-01-30 16:52:22 +08:00 committed by David S. Miller
parent 6db9e4617e
commit 7cc8f38188
1 changed files with 12 additions and 4 deletions
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16
drivers/net/bfin_mac.c
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@ -412,20 +412,26 @@ static void bf537_adjust_link(struct net_device *dev)
spin_unlock_irqrestore(&lp->lock, flags);
}
/* MDC = 2.5 MHz */
#define MDC_CLK 2500000
static int mii_probe(struct net_device *dev)
{
struct bf537mac_local *lp = netdev_priv(dev);
struct phy_device *phydev = NULL;
unsigned short sysctl;
int i;
u32 sclk, mdc_div;
/* Enable PHY output early */
if (!(bfin_read_VR_CTL() & PHYCLKOE))
bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
/* MDC = 2.5 MHz */
sclk = get_sclk();
mdc_div = ((sclk / MDC_CLK) / 2) - 1;
sysctl = bfin_read_EMAC_SYSCTL();
sysctl |= SET_MDCDIV(24);
sysctl |= SET_MDCDIV(mdc_div);
bfin_write_EMAC_SYSCTL(sysctl);
/* search for connect PHY device */
@ -477,8 +483,10 @@ static int mii_probe(struct net_device *dev)
lp->phydev = phydev;
printk(KERN_INFO "%s: attached PHY driver [%s] "
"(mii_bus:phy_addr=%s, irq=%d)\n",
DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq);
"(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)"
"@sclk=%dMHz)\n",
DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq,
MDC_CLK, mdc_div, sclk/1000000);
return 0;
}