Re: [PATCH v3 05/15] dt-bindings: dma: dw-axi-dmac: extend the number of interrupts

[Rob Herring]

On Thu, Jun 30, 2022 at 11:12:53PM +0000, Conor.Dooley@xxxxxxxxxxxxx wrote:
> On 30/06/2022 22:55, Serge Semin wrote:
> > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> > 
> > On Wed, Jun 29, 2022 at 07:43:34PM +0100, Conor Dooley wrote:
> >> From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> >>
> >> The Canaan k210 apparently has a Sysnopsys Designware AXI DMA
> >> controller, but according to the documentation & devicetree it has 6
> >> interrupts rather than the standard one. Support the 6 interrupt
> >> configuration by unconditionally extending the binding to a maximum of
> >> 8 per-channel interrupts thereby matching the number of possible
> >> channels.
> >>
> >> Link: https://canaan-creative.com/wp-content/uploads/2020/03/kendryte_standalone_programming_guide_20190311144158_en.pdf #Page 51
> >> Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> >> ---
> >>  Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml | 4 +++-
> >>  1 file changed, 3 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
> >> index 4324a94b26b2..e33ef22aec9c 100644
> >> --- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
> >> +++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
> >> @@ -34,7 +34,9 @@ properties:
> >>        - const: axidma_apb_regs
> >>
> >>    interrupts:
> > 
> >> -    maxItems: 1
> >> +    description: per channel interrupts
> > 
> > Description is inaccurate. It's either combined or per-channel IRQs.
> 
> I will change it to:
>   interrupts:
>     description: |

Don't need '|'.

>       If the IP-core synthesis parameter DMAX_INTR_IO_TYPE is set to 1, this
>       will be per-channel interrupts. Otherwise, this is a single combined IRQ
>       for all channels.
>     minItems: 1
>     maxItems: 8
> 
> How's that sound?

With that,

Reviewed-by: Rob Herring <robh@xxxxxxxxxx>