diff mbox series

[v2,2/2] dt-bindings: PCI: mediatek-gen3: add support for mt7986

Message ID 20221025072837.16591-3-linux@fw-web.de
State New
Headers
Series rework mtk pcie-gen3 bindings and support mt7986 |

Commit Message

Frank Wunderlich Oct. 25, 2022, 7:28 a.m. UTC 
  From: Frank Wunderlich <frank-w@public-files.de>

Add compatible string and clock-definition for mt7986. It needs 4 clocks
for PCIe, define them in binding.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
v2:
- squashed patch 2+3 (compatible and clock definition)
---
 .../bindings/pci/mediatek-pcie-gen3.yaml        | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

Comments

AngeloGioacchino Del Regno Oct. 25, 2022, 11:10 a.m. UTC | #1 
Il 25/10/22 09:28, Frank Wunderlich ha scritto:
> From: Frank Wunderlich <frank-w@public-files.de>
> 
> Add compatible string and clock-definition for mt7986. It needs 4 clocks
> for PCIe, define them in binding.
> 
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
> v2:
> - squashed patch 2+3 (compatible and clock definition)
> ---
>   .../bindings/pci/mediatek-pcie-gen3.yaml        | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> index 98d3f0f1cd76..57d0e84253e9 100644
> --- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> +++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> @@ -48,6 +48,7 @@ properties:
>       oneOf:
>         - items:
>             - enum:
> +              - mediatek,mt7986-pcie
>                 - mediatek,mt8188-pcie
>                 - mediatek,mt8195-pcie
>             - const: mediatek,mt8192-pcie
> @@ -78,9 +79,11 @@ properties:
>         - const: mac
>   
>     clocks:
> +    minItems: 4
>       maxItems: 6

I'm not sure that this is really correct.
If you have a list of items (const or description, doesn't matter), you don't have
to specify maxItems, as it is implicitly equal to the number of items.
Also, specifying minItems means that you're "setting" one or more items as
optional.

It looks like you're specifying a specific and definite list of items for both
clocks and clock-names... and for all of the supported SoCs, so, I don't think
that having {min,max}Items globally specified on clocks, clock-names make any
kind of sense.

.....but I'd like for someone else to give an opinion on this as well.

Krzysztof, please?

Cheers,
Angelo

>   
>     clock-names:
> +    minItems: 4
>       maxItems: 6
>   
>     assigned-clocks:
> @@ -161,6 +164,20 @@ allOf:
>               - const: tl_32k
>               - const: peri_26m
>               - const: peri_mem
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - mediatek,mt7986-pcie
> +    then:
> +      properties:
> +        clock-names:
> +          items:
> +            - const: pl_250m
> +            - const: tl_26m
> +            - const: peri_26m
> +            - const: top_133m
>   
>   unevaluatedProperties: false
>   
>
Rob Herring Oct. 26, 2022, 7:46 p.m. UTC | #2 
On Tue, Oct 25, 2022 at 01:10:56PM +0200, AngeloGioacchino Del Regno wrote:
> Il 25/10/22 09:28, Frank Wunderlich ha scritto:
> > From: Frank Wunderlich <frank-w@public-files.de>
> > 
> > Add compatible string and clock-definition for mt7986. It needs 4 clocks
> > for PCIe, define them in binding.
> > 
> > Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> > ---
> > v2:
> > - squashed patch 2+3 (compatible and clock definition)
> > ---
> >   .../bindings/pci/mediatek-pcie-gen3.yaml        | 17 +++++++++++++++++
> >   1 file changed, 17 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> > index 98d3f0f1cd76..57d0e84253e9 100644
> > --- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> > +++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> > @@ -48,6 +48,7 @@ properties:
> >       oneOf:
> >         - items:
> >             - enum:
> > +              - mediatek,mt7986-pcie
> >                 - mediatek,mt8188-pcie
> >                 - mediatek,mt8195-pcie
> >             - const: mediatek,mt8192-pcie
> > @@ -78,9 +79,11 @@ properties:
> >         - const: mac
> >     clocks:
> > +    minItems: 4
> >       maxItems: 6
> 
> I'm not sure that this is really correct.
> If you have a list of items (const or description, doesn't matter), you don't have
> to specify maxItems, as it is implicitly equal to the number of items.
> Also, specifying minItems means that you're "setting" one or more items as
> optional.
> 
> It looks like you're specifying a specific and definite list of items for both
> clocks and clock-names... and for all of the supported SoCs, so, I don't think
> that having {min,max}Items globally specified on clocks, clock-names make any
> kind of sense.
> 
> .....but I'd like for someone else to give an opinion on this as well.

It does make sense. Globally, we have the full range of possible clocks 
and then the if/then schemas further restrict it.

Rob
Rob Herring Oct. 26, 2022, 7:46 p.m. UTC | #3 
On Tue, 25 Oct 2022 09:28:37 +0200, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@public-files.de>
> 
> Add compatible string and clock-definition for mt7986. It needs 4 clocks
> for PCIe, define them in binding.
> 
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
> v2:
> - squashed patch 2+3 (compatible and clock definition)
> ---
>  .../bindings/pci/mediatek-pcie-gen3.yaml        | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
index 98d3f0f1cd76..57d0e84253e9 100644
--- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
+++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
@@ -48,6 +48,7 @@  properties:
     oneOf:
       - items:
           - enum:
+              - mediatek,mt7986-pcie
               - mediatek,mt8188-pcie
               - mediatek,mt8195-pcie
           - const: mediatek,mt8192-pcie
@@ -78,9 +79,11 @@  properties:
       - const: mac
 
   clocks:
+    minItems: 4
     maxItems: 6
 
   clock-names:
+    minItems: 4
     maxItems: 6
 
   assigned-clocks:
@@ -161,6 +164,20 @@  allOf:
             - const: tl_32k
             - const: peri_26m
             - const: peri_mem
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt7986-pcie
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: pl_250m
+            - const: tl_26m
+            - const: peri_26m
+            - const: top_133m
 
 unevaluatedProperties: false