linux-kernel - Re: [PATCH 4/5] dt-bindings: dma: ti-edma: Add option for reserved channel ranges

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Message-ID: <20190829224728.GA1198@bogus>
Date:   Thu, 29 Aug 2019 17:47:28 -0500
From:   Rob Herring <robh@...nel.org>
To:     Peter Ujfalusi <peter.ujfalusi@...com>
Cc:     vkoul@...nel.org, dan.j.williams@...el.com,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org
Subject: Re: [PATCH 4/5] dt-bindings: dma: ti-edma: Add option for reserved
 channel ranges

On Fri, Aug 23, 2019 at 03:56:17PM +0300, Peter Ujfalusi wrote:
> Similarly to paRAM slots, channels can be used by other cores.
> 
> Add optional property to configure the reserved channel ranges.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
> ---
>  Documentation/devicetree/bindings/dma/ti-edma.txt | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
> index 4bbc94d829c8..1198682ada99 100644
> --- a/Documentation/devicetree/bindings/dma/ti-edma.txt
> +++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
> @@ -42,6 +42,9 @@ Optional properties:
>  - ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
>  		the driver, they are allocated to be used by for example the
>  		DSP. See example.
> +- ti,edma-reserved-chan-ranges: channel ranges which should not be used by
> +		the driver, they are allocated to be used by for example the
> +		DSP. See example.

Based on the other thread, I think extending dma-channel-mask to a 
uint32-array makes sense here.

Rob