[PATCH v2 1/2] dt-bindings: gpu: img,powervr-rogue: add spacemit,k3-gpu

[Sterling-Ash]

Add a compatible string for the IMG BXM-4-64 GPU integrated into the
SpacemiT K3 SoC. It shares the same core as thead,th1520-gpu but is
kept as a separate compatible entry, since the K3 integration differs
from TH1520 in its clock and power-domain requirements: K3 only needs
a single "core" clock, and its GPU power domain is enabled by the
bootloader before Linux boots rather than being modelled and switched
by Linux, so no power-domains property is required for this platform
(unlike the other img,img-bxm-4-64 user).

No existing compatible-specific "if" block matches spacemit,k3-gpu, so
clocks/clock-names/power-domains all fall back to this schema's
general constraints, where power-domains is optional. This leaves room
for a power-domains provider to be added later without a further
binding change, should one ever be modelled in Linux for this SoC.

Signed-off-by: Sterling-Ash <baihui.liang at spacemit.com>
---
 Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
index a1f54dbae3f3..2d58dd4076a8 100644
--- a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
+++ b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
@@ -38,6 +38,11 @@ properties:
               - thead,th1520-gpu
           - const: img,img-bxm-4-64
           - const: img,img-rogue
+      - items:
+          - enum:
+              - spacemit,k3-gpu
+          - const: img,img-bxm-4-64
+          - const: img,img-rogue
       - items:
           - enum:
               - ti,am62p-gpu
-- 
2.34.1

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