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[net-next,v3,8/8] dt-bindings: net: sparx5: document RGMII delays

Message ID 20241118-sparx5-lan969x-switch-driver-4-v3-8-3cefee5e7e3a@microchip.com (mailing list archive)
State New
Headers show
Series net: lan969x: add RGMII support | expand

Commit Message

Daniel Machon Nov. 18, 2024, 1 p.m. UTC
The lan969x switch device supports two RGMII port interfaces that can be
configured for MAC level rx and tx delays.

Document two new properties {rx,tx}-internal-delay-ps. Make them
required properties, if the phy-mode is one of: rgmii, rgmii_id,
rgmii-rxid or rgmii-txid. Also specify accepted values.

Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
---
 .../bindings/net/microchip,sparx5-switch.yaml          | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml b/Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml
index dedfad526666..2e9ef0f7bb4b 100644
--- a/Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml
+++ b/Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml
@@ -129,6 +129,24 @@  properties:
             minimum: 0
             maximum: 383
 
+          rx-internal-delay-ps:
+            description: |
+              RGMII Receive Clock Delay defined in pico seconds, used to select
+              the DLL phase shift between 1000 ps (45 degree shift at 1Gbps) and
+              3300 ps (147 degree shift at 1Gbps). A value of 0 ps will disable
+              any delay. The Default is no delay.
+            enum: [0, 1000, 1700, 2000, 2500, 3000, 3300]
+            default: 0
+
+          tx-internal-delay-ps:
+            description: |
+              RGMII Transmit Clock Delay defined in pico seconds, used to select
+              the DLL phase shift between 1000 ps (45 degree shift at 1Gbps) and
+              3300 ps (147 degree shift at 1Gbps). A value of 0 ps will disable
+              any delay. The Default is no delay.
+            enum: [0, 1000, 1700, 2000, 2500, 3000, 3300]
+            default: 0
+
         required:
           - reg
           - phys