[PATCH net-next 2/3] dt-bindings: net: phy: mscc: document rgmii skew properties

[Antoine Tenart]

This patch documents two new properties to describe RGMII skew delays in
both Rx and Tx: vsc8584,rgmii-skew-rx and vsc8584,rgmii-skew-tx.

Signed-off-by: Antoine Tenart <antoine.tenart@xxxxxxxxxxx>
---
 .../devicetree/bindings/net/mscc-phy-vsc8531.txt       |  8 ++++++++
 include/dt-bindings/net/mscc-phy-vsc8531.h             | 10 ++++++++++
 2 files changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
index 5ff37c68c941..c682b6e74b14 100644
--- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
+++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
@@ -31,6 +31,14 @@ Optional properties:
 			  VSC8531_LINK_100_ACTIVITY (2),
 			  VSC8531_LINK_ACTIVITY (0) and
 			  VSC8531_DUPLEX_COLLISION (8).
+- vsc8584,rgmii-skew-rx	: RGMII skew delay in Rx.
+			  Allowed values are defined in
+			  "include/dt-bindings/net/mscc-phy-vsc8531.h".
+			  Default value is VSC8584_RGMII_SKEW_0_2.
+- vsc8584,rgmii-skew-tx	: RGMII skew delay in Tx.
+			  Allowed values are defined in
+			  "include/dt-bindings/net/mscc-phy-vsc8531.h".
+			  Default value is VSC8584_RGMII_SKEW_0_2.
 
 
 Table: 1 - Edge rate change
diff --git a/include/dt-bindings/net/mscc-phy-vsc8531.h b/include/dt-bindings/net/mscc-phy-vsc8531.h
index 9eb2ec2b2ea9..02313cb3fc35 100644
--- a/include/dt-bindings/net/mscc-phy-vsc8531.h
+++ b/include/dt-bindings/net/mscc-phy-vsc8531.h
@@ -28,4 +28,14 @@
 #define VSC8531_FORCE_LED_OFF           14
 #define VSC8531_FORCE_LED_ON            15
 
+/* RGMII skew values, in ns */
+#define VSC8584_RGMII_SKEW_0_2		0
+#define VSC8584_RGMII_SKEW_0_8		1
+#define VSC8584_RGMII_SKEW_1_1		2
+#define VSC8584_RGMII_SKEW_1_7		3
+#define VSC8584_RGMII_SKEW_2_0		4
+#define VSC8584_RGMII_SKEW_2_3		5
+#define VSC8584_RGMII_SKEW_2_6		6
+#define VSC8584_RGMII_SKEW_3_4		7
+
 #endif
-- 
2.24.1