diff mbox series

[02/21] dt-bindings: gpu: img: Further constrain clocks

Message ID 20241105-sets-bxs-4-64-patch-v1-v1-2-4ed30e865892@imgtec.com (mailing list archive)
State New
Headers show
Series Imagination BXS-4-64 MC1 GPU support | expand

Commit Message

Matt Coster Nov. 5, 2024, 3:58 p.m. UTC
All Imagination GPUs use three clocks: core, mem and sys. All reasonably
modern Imagination GPUs also support a single-clock mode where the SoC
only hooks up core and the other two are derived internally. On GPUs which
support this mode, it is the default and most commonly used integration.

Codify this "1 or 3" constraint in our bindings and hang the specifics off
the vendor compatible string to mirror the integration-time choice.

Signed-off-by: Matt Coster <matt.coster@imgtec.com>
---
 .../devicetree/bindings/gpu/img,powervr-rogue.yaml | 27 +++++++++++++++-------
 1 file changed, 19 insertions(+), 8 deletions(-)

Comments

Conor Dooley Nov. 5, 2024, 6:16 p.m. UTC | #1
On Tue, Nov 05, 2024 at 03:58:08PM +0000, Matt Coster wrote:
> All Imagination GPUs use three clocks: core, mem and sys. All reasonably
> modern Imagination GPUs also support a single-clock mode where the SoC
> only hooks up core and the other two are derived internally. On GPUs which
> support this mode, it is the default and most commonly used integration.
> 
> Codify this "1 or 3" constraint in our bindings and hang the specifics off
> the vendor compatible string to mirror the integration-time choice.
> 
> Signed-off-by: Matt Coster <matt.coster@imgtec.com>
> ---
>  .../devicetree/bindings/gpu/img,powervr-rogue.yaml | 27 +++++++++++++++-------
>  1 file changed, 19 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
> index ef7070daf213277d0190fe319e202fdc597337d4..6924831d3e9dd9b2b052ca8f9d7228ff25526532 100644
> --- a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
> +++ b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
> @@ -30,15 +30,20 @@ properties:
>      maxItems: 1
>  
>    clocks:
> -    minItems: 1
> -    maxItems: 3
> +    oneOf:
> +      - minItems: 1
> +        maxItems: 1
> +      - minItems: 3
> +        maxItems: 3

Just put the outer constraints here and...

>    clock-names:
> -    items:
> -      - const: core
> -      - const: mem
> -      - const: sys
> -    minItems: 1
> +    oneOf:
> +      - items:
> +          - const: core
> +      - items:
> +          - const: core
> +          - const: mem
> +          - const: sys
>  
>    interrupts:
>      maxItems: 1
> @@ -56,15 +61,21 @@ required:
>  additionalProperties: false
>  
>  allOf:
> +  # Vendor integrations using a single clock domain
>    - if:
>        properties:
>          compatible:
>            contains:
> -            const: ti,am62-gpu
> +            anyOf:
> +              - const: ti,am62-gpu
>      then:
>        properties:
>          clocks:
> +          minItems: 1
>            maxItems: 1

...adjust the constraints in conditional bits. Setting minItems to 1
should be a nop too. Pretty sure what you already had here was actually
already sufficient.

Cheers,
Conor.

> +        clock-names:
> +          items:
> +            - const: core
>  
>  examples:
>    - |
> 
> -- 
> 2.47.0
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
index ef7070daf213277d0190fe319e202fdc597337d4..6924831d3e9dd9b2b052ca8f9d7228ff25526532 100644
--- a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
+++ b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
@@ -30,15 +30,20 @@  properties:
     maxItems: 1
 
   clocks:
-    minItems: 1
-    maxItems: 3
+    oneOf:
+      - minItems: 1
+        maxItems: 1
+      - minItems: 3
+        maxItems: 3
 
   clock-names:
-    items:
-      - const: core
-      - const: mem
-      - const: sys
-    minItems: 1
+    oneOf:
+      - items:
+          - const: core
+      - items:
+          - const: core
+          - const: mem
+          - const: sys
 
   interrupts:
     maxItems: 1
@@ -56,15 +61,21 @@  required:
 additionalProperties: false
 
 allOf:
+  # Vendor integrations using a single clock domain
   - if:
       properties:
         compatible:
           contains:
-            const: ti,am62-gpu
+            anyOf:
+              - const: ti,am62-gpu
     then:
       properties:
         clocks:
+          minItems: 1
           maxItems: 1
+        clock-names:
+          items:
+            - const: core
 
 examples:
   - |