diff options
authorJohan Hovold <>2014-11-19 12:59:21 +0100
committerDavid S. Miller <>2014-11-21 14:08:57 -0500
commitc3a8e1eddd6c140fbaaf957f7da8f2175f79623d (patch)
parent6d01329444725a5c17cf75ba6c5c0c5e42843613 (diff)
dt/bindings: add clock-select function property to micrel phy binding
Add "micrel,rmii-reference-clock-select-25-mhz" to Micrel ethernet PHY binding documentation. This property is needed to properly describe some revisions of Micrel PHYs which has the function of this configuration bit inverted so that setting it enables 25 MHz rather than 50 MHz clock mode. Note that a clock reference ("rmii-ref") is still needed to actually select either mode. Cc: Signed-off-by: Johan Hovold <> Acked-by: Sascha Hauer <> Signed-off-by: David S. Miller <>
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/micrel.txt b/Documentation/devicetree/bindings/net/micrel.txt
index 20a6cac7abc6..87496a8c64ab 100644
--- a/Documentation/devicetree/bindings/net/micrel.txt
+++ b/Documentation/devicetree/bindings/net/micrel.txt
@@ -19,6 +19,17 @@ Optional properties:
See the respective PHY datasheet for the mode values.
+ - micrel,rmii-reference-clock-select-25-mhz: RMII Reference Clock Select
+ bit selects 25 MHz mode
+ Setting the RMII Reference Clock Select bit enables 25 MHz rather
+ than 50 MHz clock mode.
+ Note that this option in only needed for certain PHY revisions with a
+ non-standard, inverted function of this configuration bit.
+ Specifically, a clock reference ("rmii-ref" below) is always needed to
+ actually select a mode.
- clocks, clock-names: contains clocks according to the common clock bindings.
supported clocks: