While the current Device Trees for TI EVMs configure the PRUSS Ethernet
controller as a toplevel node with names like "icssg1-eth", allowing to
make it a subnode of the ICSSG has a number of advantages:
- It makes sense semantically - the Ethernet controller is running on
the ICSSG/PRUSS
- Disabling or deleting the ICSSG node implicitly removes the Ethernet
controller node when it is a child node. This can be relevant on SoCs
like the AM64x which come in variants with and without ICSSG; e.g., on
the TQMa64xxL the ICSSG node will be disabled on variants without as a
bootloader fixup.
On Linux, this avoids leaving the Ethernet controller in deferred
state forever while waiting for the ICSSG to become available
(resulting in a warning on newer kernels)
The node name "ethernet" is chosen as it nicely matches the regular
"ethernet@<reg>" format of many Ethernet controller nodes, and is also
what the prueth binding example (/schemas/net/ti,icssg-prueth.yaml) uses.
Signed-off-by: Matthias Schiffer <matthias.schiffer@xxxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml b/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml
index c402cb2928e89..89dfcf5ce8434 100644
--- a/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml
+++ b/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml
@@ -92,6 +92,13 @@ properties:
description: |
This property is as per sci-pm-domain.txt.
+ ethernet:
+ description: |
+ ICSSG PRUSS Ethernet. Configuration for an Ethernet controller running
+ on the PRU-ICSS.
+ $ref: /schemas/net/ti,icssg-prueth.yaml#
+ type: object
+
patternProperties:
memories@[a-f0-9]+$:
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