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GET /api/1.1/patches/2230769/?format=api
{ "id": 2230769, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230769/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260430024945.3413973-2-wei.fang@nxp.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.1/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/" }, "msgid": "<20260430024945.3413973-2-wei.fang@nxp.com>", "date": "2026-04-30T02:49:31", "name": "[v5,net-next,01/15] dt-bindings: net: dsa: update the description of 'dsa,member' property", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "9939d2144e27fca37e83e2dd5b4422d3ed1e6dc1", "submitter": { "id": 84380, "url": "http://patchwork.ozlabs.org/api/1.1/people/84380/?format=api", "name": "Wei Fang", "email": "wei.fang@nxp.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260430024945.3413973-2-wei.fang@nxp.com/mbox/", "series": [ { "id": 502180, "url": "http://patchwork.ozlabs.org/api/1.1/series/502180/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=502180", "date": "2026-04-30T02:49:30", "name": "Add preliminary NETC switch support for i.MX94", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/502180/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230769/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230769/checks/", "tags": {}, "headers": { "Return-Path": "\n <linuxppc-dev+bounces-20304-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" 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(2024-03-25) on lists.ozlabs.org" }, "content": "The current description indicates that the 'dsa,member' property cannot\nbe set for a switch that is not part of any cluster. Vladimir thinks\nthat this is a case where the actual technical limitation was poorly\ntransposed into words when this restriction was first documented, in\ncommit 8c5ad1d6179d (\"net: dsa: Document new binding\").\n\nThe true technical limitation is that many DSA tagging protocols are\ntopology-unaware, and always call dsa_conduit_find_user() with a\nswitch_id of 0. Specifying a custom \"dsa,member\" property with a\nnon-zero switch_id would break them.\n\nTherefore, for topology-aware switches, it is fine to specify this\nproperty for them, even if they are not part of any cluster. Our NETC\nswitch is a good example which is topology-aware, the switch_id is\ncarried in the switch tag, but the switch_id 0 is reserved for VEPA\nswitch and cannot be used, so we need to use this property to assign\na non-zero switch_id for it.\n\nSuggested-by: Vladimir Oltean <vladimir.oltean@nxp.com>\nSigned-off-by: Wei Fang <wei.fang@nxp.com>\nAcked-by: Rob Herring (Arm) <robh@kernel.org>\n---\n Documentation/devicetree/bindings/net/dsa/dsa.yaml | 6 +++++-\n 1 file changed, 5 insertions(+), 1 deletion(-)", "diff": "diff --git a/Documentation/devicetree/bindings/net/dsa/dsa.yaml b/Documentation/devicetree/bindings/net/dsa/dsa.yaml\nindex 2abd036578d1..801e1411e5c2 100644\n--- a/Documentation/devicetree/bindings/net/dsa/dsa.yaml\n+++ b/Documentation/devicetree/bindings/net/dsa/dsa.yaml\n@@ -28,7 +28,11 @@ properties:\n A two element list indicates which DSA cluster, and position within the\n cluster a switch takes. <0 0> is cluster 0, switch 0. <0 1> is cluster 0,\n switch 1. <1 0> is cluster 1, switch 0. A switch not part of any cluster\n- (single device hanging off a CPU port) must not specify this property\n+ (single device hanging off a CPU port) does not usually need to specify\n+ this property, and then it becomes cluster 0, switch 0. For a topology\n+ aware switch, its switch index can be specified through this property,\n+ even if it is not part of any cluster. Also, topology-unaware switches\n+ must always be defined as index 0 of their cluster.\n $ref: /schemas/types.yaml#/definitions/uint32-array\n \n additionalProperties: true\n", "prefixes": [ "v5", "net-next", "01/15" ] }