[PATCH v3 net-next 02/15] dt-bindings: net: add ptp-timer property

Wei Fang
2025-08-12T10:07:16Z

For some Ethernet controllers, the PTP timer function is not integrated.
Instead, the PTP timer is a separate device and provides PTP Hardware
Clock (PHC) to the Ethernet controller to use, such as NXP FMan MAC,
ENETC, etc. Therefore, a property is needed to indicate this hardware
relationship between the Ethernet controller and the PTP timer.

Since this use case is also very common, it is better to add a generic
property to ethernet-controller.yaml. According to the existing binding
docs, there are two good candidates, one is the "ptp-timer" defined in
fsl,fman-dtsec.yaml, and the other is the "ptimer-handle" defined in
fsl,fman.yaml. From the perspective of the name, the former is more
straightforward, so add the "ptp-timer" property.

Signed-off-by: Wei Fang <wei.fang@nxp.com>

---
v3 changes:
New patch, add a generic property instead of adding a property to
fsl,enetc.yaml
---
.../devicetree/bindings/net/ethernet-controller.yaml | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
index 66b1cfbbfe22..2c924d296a8f 100644
--- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
@@ -108,6 +108,11 @@ properties:
$ref: "#/properties/phy-handle"
deprecated: true

+ ptp-timer:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Specifies a reference to a node representing an IEEE 1588 PTP device.
+
rx-fifo-depth:
$ref: /schemas/types.yaml#/definitions/uint32
description:
--
2.34.1