Introduce a new `master-slave` string property in the ethernet-phy
binding to specify the link role for Single Pair Ethernet
(1000/100/10Base-T1) PHYs. This property supports the values
`forced-master` and `forced-slave`, which allow the PHY to operate in a
predefined role, necessary when hardware strap pins are unavailable or
wrongly set.
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
changes v2:
- use string property instead of multiple flags
---
.../devicetree/bindings/net/ethernet-phy.yaml | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
index d9b62741a2259..025e59f6be6f3 100644
--- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
@@ -158,6 +158,20 @@ properties:
Mark the corresponding energy efficient ethernet mode as
broken and request the ethernet to stop advertising it.
+ master-slave:
+ $ref: /schemas/types.yaml#/definitions/string
+ enum:
+ - forced-master
+ - forced-slave
+ description: |
+ Specifies the predefined link role for the PHY in Single Pair Ethernet
+ (1000/100/10Base-T1). This property is required for setups where the link
+ role must be assigned by the device tree due to limitations in using
+ hardware strap pins.
+
+ - 'forced-master': The PHY is forced to operate as a master.
+ - 'forced-slave': The PHY is forced to operate as a slave.
+
pses:
$ref: /schemas/types.yaml#/definitions/phandle-array
maxItems: 1
--
2.39.2
