[PATCH 2/4] dt-bindings: hwinfo: ti,k3-socinfo: Add nvmem-cells

[Markus Schneider-Pargmann <msp@baylibre.com>]

The information k3-socinfo requires is stored in an efuse area. This
area is required by other devices/drivers as well, so using nvmem-cells
can be a cleaner way to describe which information are used.

If nvmem-cells are supplied, the address range is not required.
Cells chipvariant, chippartno and chipmanufacturer are introduced to
cover all required information.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Reviewed-by: Andrew Davis <afd@ti.com>
---
 .../bindings/hwinfo/ti,k3-socinfo.yaml        | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/hwinfo/ti,k3-socinfo.yaml b/Documentation/devicetree/bindings/hwinfo/ti,k3-socinfo.yaml
index dada28b47ea0..f085b7275b7d 100644
--- a/Documentation/devicetree/bindings/hwinfo/ti,k3-socinfo.yaml
+++ b/Documentation/devicetree/bindings/hwinfo/ti,k3-socinfo.yaml
@@ -26,9 +26,24 @@ properties:
   reg:
     maxItems: 1
 
+  nvmem-cells:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+
+  nvmem-cell-names:
+    items:
+      - const: chipvariant
+      - const: chippartno
+      - const: chipmanufacturer
+
 required:
   - compatible
-  - reg
+
+oneOf:
+  - required:
+      - reg
+  - required:
+      - nvmem-cells
+      - nvmem-cell-names
 
 additionalProperties: false
 
@@ -38,3 +53,9 @@ examples:
         compatible = "ti,am654-chipid";
         reg = <0x43000014 0x4>;
     };
+  - |
+    chipid: chipid@14 {
+        compatible = "ti,am654-chipid";
+        nvmem-cells = <&chip_variant>, <&chip_partno>, <&chip_manufacturer>;
+        nvmem-cell-names = "chipvariant", "chippartno", "chipmanufacturer";
+    };
-- 
2.43.0