[RFC PATCH 3/3] devicetree: macb: Add optional property tsu-clk

[Harini Katakam]

Add TSU clock frequency to be used for 1588 support in macb driver.

Signed-off-by: Harini Katakam <harinik@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/net/macb.txt |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
index b5d7976..f7c0ea8 100644
--- a/Documentation/devicetree/bindings/net/macb.txt
+++ b/Documentation/devicetree/bindings/net/macb.txt
@@ -19,6 +19,9 @@ Required properties:
 	Optional elements: 'tx_clk'
 - clocks: Phandles to input clocks.
 
+Optional properties:
+- tsu-clk: Time stamp unit clock frequency used.
+
 Examples:
 
 	macb0: ethernet@fffc4000 {
-- 
1.7.9.5

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