[RFC PATCH v3 7/9] dt-bindings: npu: rockchip, rk3588-rknn-core: Add RK3568

[Midgy BALON <midgy971@gmail.com>]

The RK3568 carries a single core of the same NVDLA-derived NPU IP as the
RK3588.  Add its compatible.

On RK3568 the NPU NOC bus-idle and power gating are controlled through the
system PMU rather than a dedicated register block, so add a rockchip,pmu
phandle to that syscon.  The RK3568 NPU has no dedicated SRAM rail, so
sram-supply is required only on RK3588.

Signed-off-by: Midgy BALON <midgy971@gmail.com>
---
 .../npu/rockchip,rk3588-rknn-core.yaml         | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml b/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml
index caca2a4903cd1..af9936b32e9fe 100644
--- a/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml
+++ b/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml
@@ -21,6 +21,7 @@ properties:
 
   compatible:
     enum:
+      - rockchip,rk3568-rknn-core
       - rockchip,rk3588-rknn-core
 
   reg:
@@ -50,6 +51,13 @@ properties:
 
   npu-supply: true
 
+  rockchip,pmu:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the PMU syscon.  On RK3568 the NPU's NOC bus-idle and
+      power gating are controlled through the PMU; this points to that
+      syscon so those registers can be reached.
+
   power-domains:
     maxItems: 1
 
@@ -75,7 +83,15 @@ required:
   - resets
   - reset-names
   - npu-supply
-  - sram-supply
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: rockchip,rk3588-rknn-core
+then:
+  required:
+    - sram-supply
 
 additionalProperties: false
 
-- 
2.39.5