[PATCH v2 2/4] dt-bindings: npu: rockchip,rk3588-rknn-core: Add RK3568 support

[MidG971 <midgy971@gmail.com>]

From: Midgy BALON <midgy971@gmail.com>

Add rockchip,rk3568-rknn-core to the compatible enum, document the
new rockchip,pmu phandle that RK3568 needs for the NPU NOC bus de-idle
sequence, and make sram-supply only required on RK3588 (RK3568 has no
NPU SRAM rail).

The driver supports both RK3568 and RK3588 RKNN cores; the binding now
documents both. The rockchip,pmu phandle is consumed by the driver to
issue PMU register writes (BUS_IDLE_SFTCON0, NOC_AUTO_CON0,
PWR_GATE_SFTCON, BUS_IDLE_ST) on RK3568 only.

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 caca2a490..6582a0c5c 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:
+    : /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the Rockchip PMU syscon node.  Required on RK3568 to
+      perform the NPU NOC bus de-idle sequence via PMU registers before
+      the hardware can be accessed.
+
   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