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authorJonas Gorski <jogo@openwrt.org>2011-10-11 23:05:13 +0000
committerJonas Gorski <jogo@openwrt.org>2011-10-11 23:05:13 +0000
commit03f91068d10bb74c2d292b2245fdf41c987eefdf (patch)
tree6b2ed4ae7b02786ea4565e0f89f153c9ab25d047 /target/linux
parentb7a2a748239f692fe899afac2adc9d7801279ac1 (diff)
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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. SVN-Revision: 28422
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/ar71xx/patches-2.6.39/920-mdio_bitbang_ignore_ta_value.patch20
1 files changed, 20 insertions, 0 deletions
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 0000000000..39584aabfa
--- /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);