From 0f944343dd850a519bbfb9e347e69bdd05ad9fd9 Mon Sep 17 00:00:00 2001
From: jogo <jogo@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Tue, 11 Oct 2011 23:05:13 +0000
Subject: ar71xx: add a workaround for ar8316 not always driving the TA bit to
low
AR8316 behind a GPIO bitbanged MDIO bus fails to drive the turnaround bit
to low despite returning a valid value. Ignore it and just use the
returned value anyway.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28422 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../920-mdio_bitbang_ignore_ta_value.patch | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
create mode 100644 target/linux/ar71xx/patches-2.6.39/920-mdio_bitbang_ignore_ta_value.patch
(limited to 'target/linux')
diff --git a/target/linux/ar71xx/patches-2.6.39/920-mdio_bitbang_ignore_ta_value.patch b/target/linux/ar71xx/patches-2.6.39/920-mdio_bitbang_ignore_ta_value.patch
new file mode 100644
index 000000000..39584aabf
--- /dev/null
+++ b/target/linux/ar71xx/patches-2.6.39/920-mdio_bitbang_ignore_ta_value.patch
@@ -0,0 +1,20 @@
+--- a/drivers/net/phy/mdio-bitbang.c
++++ b/drivers/net/phy/mdio-bitbang.c
+@@ -165,16 +165,7 @@ static int mdiobb_read(struct mii_bus *b
+
+ 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);
--
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