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authorTom Lendacky <thomas.lendacky@amd.com>2015-02-24 10:47:49 -0600
committerDavid S. Miller <davem@davemloft.net>2015-02-25 16:57:42 -0500
commit74ad752442d9488cf02ee2a9243d6c6b5c943efb (patch)
treeaf8e09c59ad00cc9ef1183d14bc7944d76a76177 /Documentation/devicetree/bindings/net
parent5c2d2b148b35a995f0c0e76a3a37902ec98f164c (diff)
downloadkernel-74ad752442d9488cf02ee2a9243d6c6b5c943efb.tar.gz
amd-xgbe-phy: PHY KX/KR mode differences
The PHY requires different settings for the Decision Feedback Analyzer (DFE) when running in KX mode vs. KR mode. Update the code to change these settings when changing modes in order to provide a more stable link. Additionally, adjust the 10GbE PQ skew default setting to a more sane value. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/devicetree/bindings/net')
-rw-r--r--Documentation/devicetree/bindings/net/amd-xgbe-phy.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/amd-xgbe-phy.txt b/Documentation/devicetree/bindings/net/amd-xgbe-phy.txt
index 33df3932168e..8db32384a486 100644
--- a/Documentation/devicetree/bindings/net/amd-xgbe-phy.txt
+++ b/Documentation/devicetree/bindings/net/amd-xgbe-phy.txt
@@ -27,6 +27,8 @@ property is used.
- amd,serdes-cdr-rate: CDR rate speed selection
- amd,serdes-pq-skew: PQ (data sampling) skew
- amd,serdes-tx-amp: TX amplitude boost
+- amd,serdes-dfe-tap-config: DFE taps available to run
+- amd,serdes-dfe-tap-enable: DFE taps to enable
Example:
xgbe_phy@e1240800 {
@@ -41,4 +43,6 @@ Example:
amd,serdes-cdr-rate = <2>, <2>, <7>;
amd,serdes-pq-skew = <10>, <10>, <30>;
amd,serdes-tx-amp = <15>, <15>, <10>;
+ amd,serdes-dfe-tap-config = <3>, <3>, <1>;
+ amd,serdes-dfe-tap-enable = <0>, <0>, <127>;
};