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Commit 7cc8f381 authored by Bryan Wu's avatar Bryan Wu Committed by David S. Miller
Browse files

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



Signed-off-by: default avatarBryan Wu <bryan.wu@analog.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6db9e461

drivers/net/bfin_mac.c

+12 −4
Original line number Diff line number Diff line
@@ -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;

}