Re: [PATCH] dt-bindings: dma: fsl-mxs-dma: Convert MXS DMA to DT schema

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On 12/19/22 09:36, Krzysztof Kozlowski wrote:
On 18/12/2022 20:06, Marek Vasut wrote:
On 12/18/22 19:46, Krzysztof Kozlowski wrote:
On 18/12/2022 00:12, Marek Vasut wrote:
On 12/17/22 12:05, Krzysztof Kozlowski wrote:

[...]

+allOf:
+  - $ref: dma-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          not:

I think "not:" goes just after "if:". Please double check that it's correct.

Anyway it is easier to have this without negation and you already
enumerate all variants (here and below).

About this part, I don't think that works. See this:

$ git grep -A 15 'imx2[38]-dma-apb[hx]' arch/ | grep
'\(imx2[38]-dma-apb[hx]\|dma-channels\)'
arch/arm/boot/dts/imx23.dtsi: compatible = "fsl,imx23-dma-apbh";
arch/arm/boot/dts/imx23.dtsi- dma-channels = <8>;
arch/arm/boot/dts/imx23.dtsi: compatible = "fsl,imx23-dma-apbx";
arch/arm/boot/dts/imx23.dtsi- dma-channels = <16>;
arch/arm/boot/dts/imx28.dtsi: compatible = "fsl,imx28-dma-apbh";
arch/arm/boot/dts/imx28.dtsi- dma-channels = <16>;
arch/arm/boot/dts/imx28.dtsi: compatible = "fsl,imx28-dma-apbx";
arch/arm/boot/dts/imx28.dtsi- dma-channels = <16>;
arch/arm/boot/dts/imx6qdl.dtsi: compatible = "fsl,imx6q-dma-apbh",
"fsl,imx28-dma-apbh";
arch/arm/boot/dts/imx6qdl.dtsi- dma-channels = <4>;
arch/arm/boot/dts/imx6sx.dtsi: compatible = "fsl,imx6sx-dma-apbh",
"fsl,imx28-dma-apbh";
arch/arm/boot/dts/imx6sx.dtsi- dma-channels = <4>;
arch/arm/boot/dts/imx6ul.dtsi: compatible = "fsl,imx6q-dma-apbh",
"fsl,imx28-dma-apbh";
arch/arm/boot/dts/imx6ul.dtsi- dma-channels = <4>;
arch/arm/boot/dts/imx7s.dtsi: compatible = "fsl,imx7d-dma-apbh",
"fsl,imx28-dma-apbh";
arch/arm/boot/dts/imx7s.dtsi- dma-channels = <4>;
arch/arm64/boot/dts/freescale/imx8mm.dtsi: compatible =
"fsl,imx7d-dma-apbh", "fsl,imx28-dma-apbh";
arch/arm64/boot/dts/freescale/imx8mm.dtsi- dma-channels = <4>;
arch/arm64/boot/dts/freescale/imx8mn.dtsi: compatible =
"fsl,imx7d-dma-apbh", "fsl,imx28-dma-apbh";
arch/arm64/boot/dts/freescale/imx8mn.dtsi- dma-channels = <4>;

So I think what we have to do to validate that, is, say

default: 4

if does not match on 6q/6sx/7d/23-apbx/28-abbh/28-apbx then 8

if does not match on 6q/6sx/7d/23-apbh then 16

But if there is a better way to validate the above, please do tell.

Then your existing if:then: is also not correct because you require for
fsl,imx28-dma-apbh (as it is not in second if:then:) const:16. Just
don't require it.

So, shall I just drop the entire allOf: section ?

No, what about the interrupts?

The interrupts and dma-channels are matched 1:1 for this controller, 1 DMA channel, 1 interrupt. 16 dma channels means 16 interrupts .



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