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-rw-r--r--Documentation/devicetree/bindings/net/sff,sfp.txt10
1 files changed, 7 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/net/sff,sfp.txt b/Documentation/devicetree/bindings/net/sff,sfp.txt
index 60e970ce10ee..f1c441bedf68 100644
--- a/Documentation/devicetree/bindings/net/sff,sfp.txt
+++ b/Documentation/devicetree/bindings/net/sff,sfp.txt
@@ -3,7 +3,9 @@ Transceiver
Required properties:
-- compatible : must be "sff,sfp"
+- compatible : must be one of
+ "sff,sfp" for SFP modules
+ "sff,sff" for soldered down SFF modules
Optional Properties:
@@ -11,7 +13,8 @@ Optional Properties:
interface
- mod-def0-gpios : GPIO phandle and a specifier of the MOD-DEF0 (AKA Mod_ABS)
- module presence input gpio signal, active (module absent) high
+ module presence input gpio signal, active (module absent) high. Must
+ not be present for SFF modules
- los-gpios : GPIO phandle and a specifier of the Receiver Loss of Signal
Indication input gpio signal, active (signal lost) high
@@ -24,10 +27,11 @@ Optional Properties:
- rate-select0-gpios : GPIO phandle and a specifier of the Rx Signaling Rate
Select (AKA RS0) output gpio signal, low: low Rx rate, high: high Rx rate
+ Must not be present for SFF modules
- rate-select1-gpios : GPIO phandle and a specifier of the Tx Signaling Rate
Select (AKA RS1) output gpio signal (SFP+ only), low: low Tx rate, high:
- high Tx rate
+ high Tx rate. Must not be present for SFF modules
Example #1: Direct serdes to SFP connection