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-rw-r--r--Documentation/devicetree/bindings/net/stmmac.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt
index 9b03c57563a4..c41afd963edf 100644
--- a/Documentation/devicetree/bindings/net/stmmac.txt
+++ b/Documentation/devicetree/bindings/net/stmmac.txt
@@ -39,6 +39,10 @@ Optional properties:
further clocks may be specified in derived bindings.
- clock-names: One name for each entry in the clocks property, the
first one should be "stmmaceth".
+- clk_ptp_ref: this is the PTP reference clock; in case of the PTP is
+ available this clock is used for programming the Timestamp Addend Register.
+ If not passed then the system clock will be used and this is fine on some
+ platforms.
Examples:
@@ -54,5 +58,5 @@ Examples:
snps,multicast-filter-bins = <256>;
snps,perfect-filter-entries = <128>;
clocks = <&clock>;
- clock-names = "stmmaceth">;
+ clock-names = "stmmaceth";
};