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CPM6 integrates a Synopsys DesignWare PCIe Root Port controller derived from the same IP family as the existing MDB host bridge, but uses a newer IP revision, supports PCIe Gen6 operation up to 64 GT/s per lane and has differences in register layout. A separate compatible string is required to accurately describe the CPM6 hardware and allow software to distinguish it from the MDB-based host bridge. Signed-off-by: Sai Krishna Musham --- .../devicetree/bindings/pci/amd,versal2-mdb-host.yaml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml index 406c15e1dee1..be5a77908d24 100644 --- a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml +++ b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml @@ -15,7 +15,9 @@ allOf: properties: compatible: - const: amd,versal2-mdb-host + enum: + - amd,versal2-mdb-host + - amd,versal2-cpm6-host reg: items: -- 2.44.4