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From e73f7d9a658c7fc693a9b9c45a1f65c014dd6e40 Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Tue, 13 May 2014 01:17:38 +0200
Subject: [PATCH] phy: mdio-bitbang: ignore TA value
This is necessary on rb493g to make the kernel detect the second switch.
---
drivers/net/phy/mdio-bitbang.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/drivers/net/phy/mdio-bitbang.c b/drivers/net/phy/mdio-bitbang.c
index daec9b0..4fa2be0 100644
--- a/drivers/net/phy/mdio-bitbang.c
+++ b/drivers/net/phy/mdio-bitbang.c
@@ -155,7 +155,7 @@ static int mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, u32 addr)
static int mdiobb_read(struct mii_bus *bus, int phy, int reg)
{
struct mdiobb_ctrl *ctrl = bus->priv;
- int ret, i;
+ int ret;
if (reg & MII_ADDR_C45) {
reg = mdiobb_cmd_addr(ctrl, phy, reg);
@@ -165,16 +165,7 @@ static int mdiobb_read(struct mii_bus *bus, int phy, int reg)
ctrl->ops->set_mdio_dir(ctrl, 0);
- /* check the turnaround bit: the PHY should be driving it to zero */
- if (mdiobb_get_bit(ctrl) != 0) {
- /* PHY didn't drive TA low -- flush any bits it
- * may be trying to send.
- */
- for (i = 0; i < 32; i++)
- mdiobb_get_bit(ctrl);
-
- return 0xffff;
- }
+ mdiobb_get_bit(ctrl);
ret = mdiobb_get_num(ctrl, 16);
mdiobb_get_bit(ctrl);
--
1.8.5.3
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