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smsc95xx: set MII_BUSY bit to read/write PHY regs 

The device datasheet specifies the BUSY bit must be set when reading
or writing phy registers.  This patch ensures we do that.

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Glendinning 2012-11-06 00:08:53 +00:00 committed by David S. Miller
parent 0c9f79be29
commit 80928805ba
1 changed files with 2 additions and 2 deletions
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4
drivers/net/usb/smsc95xx.c
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@ -184,7 +184,7 @@ static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
/* set the address, index & direction (read from PHY) */
phy_id &= dev->mii.phy_id_mask;
idx &= dev->mii.reg_num_mask;
addr = (phy_id << 11) | (idx << 6) | MII_READ_;
addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
check_warn_goto_done(ret, "Error writing MII_ADDR");
@ -221,7 +221,7 @@ static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
/* set the address, index & direction (write to PHY) */
phy_id &= dev->mii.phy_id_mask;
idx &= dev->mii.reg_num_mask;
addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
check_warn_goto_done(ret, "Error writing MII_ADDR");