netdev - [RFC 2/2] phylib: Convert MDIO bitbang to new MDIO 45 format

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Message-Id: <1271997497-6896-3-git-send-email-afleming@freescale.com>
Date:	Thu, 22 Apr 2010 23:38:17 -0500
From:	Andy Fleming <afleming@...escale.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org
Subject: [RFC 2/2] phylib: Convert MDIO bitbang to new MDIO 45 format

Now that we've added somewhat more complete MDIO 45 support to the PHY
Lib, convert the MDIO bitbang driver to use this new infrastructure.

Signed-off-by: Andy Fleming <afleming@...escale.com>
---
 drivers/net/phy/mdio-bitbang.c |   23 +++++++++++------------
 1 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/net/phy/mdio-bitbang.c b/drivers/net/phy/mdio-bitbang.c
index 2f6f02e..4c0c89b 100644
--- a/drivers/net/phy/mdio-bitbang.c
+++ b/drivers/net/phy/mdio-bitbang.c
@@ -134,11 +134,10 @@ static void mdiobb_cmd(struct mdiobb_ctrl *ctrl, int op, u8 phy, u8 reg)
    MII_ADDR_C45 into the address. Theoretically clause 45 and normal devices
    can exist on the same bus. Normal devices should ignore the MDIO_ADDR
    phase. */
-static int mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, u32 addr)
+static void mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, int devad,
+				int reg)
 {
-	unsigned int dev_addr = (addr >> 16) & 0x1F;
-	unsigned int reg = addr & 0xFFFF;
-	mdiobb_cmd(ctrl, MDIO_C45_ADDR, phy, dev_addr);
+	mdiobb_cmd(ctrl, MDIO_C45_ADDR, phy, devad);
 
 	/* send the turnaround (10) */
 	mdiobb_send_bit(ctrl, 1);
@@ -148,8 +147,6 @@ static int mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, u32 addr)
 
 	ctrl->ops->set_mdio_dir(ctrl, 0);
 	mdiobb_get_bit(ctrl);
-
-	return dev_addr;
 }
 
 static int mdiobb_read(struct mii_bus *bus, int phy, int devad, int reg)
@@ -157,9 +154,10 @@ static int mdiobb_read(struct mii_bus *bus, int phy, int devad, int reg)
 	struct mdiobb_ctrl *ctrl = bus->priv;
 	int ret, i;
 
-	if (reg & MII_ADDR_C45) {
-		reg = mdiobb_cmd_addr(ctrl, phy, reg);
-		mdiobb_cmd(ctrl, MDIO_C45_READ, phy, reg);
+	/* Clause 22 PHYs only use devad = 0, and Clause 45 only use nonzero */
+	if (devad) {
+		mdiobb_cmd_addr(ctrl, phy, devad, reg);
+		mdiobb_cmd(ctrl, MDIO_C45_READ, phy, devad);
 	} else
 		mdiobb_cmd(ctrl, MDIO_READ, phy, reg);
 
@@ -186,9 +184,10 @@ static int mdiobb_write(struct mii_bus *bus, int phy, int devad, int reg,
 {
 	struct mdiobb_ctrl *ctrl = bus->priv;
 
-	if (reg & MII_ADDR_C45) {
-		reg = mdiobb_cmd_addr(ctrl, phy, reg);
-		mdiobb_cmd(ctrl, MDIO_C45_WRITE, phy, reg);
+	/* Clause 22 PHYs only use devad = 0, and Clause 45 only use nonzero */
+	if (devad) {
+		mdiobb_cmd_addr(ctrl, phy, devad, reg);
+		mdiobb_cmd(ctrl, MDIO_C45_WRITE, phy, devad);
 	} else
 		mdiobb_cmd(ctrl, MDIO_WRITE, phy, reg);
 
-- 
1.6.5.2.g6ff9a

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