On 19/09/2022 12:25, Akhil R wrote:
> Add dma-channel-mask property in Tegra GPCDMA document.
>
> The property would help to specify the channels to be used in
> kernel and reserve few for the firmware. This was previously
> achieved by limiting the channel number to 31 in the driver.
> Now since we can list all 32 channels, update the interrupts
> property as well to list all 32 interrupts.
>
> Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
> ---
> .../devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
> index 7e575296df0c..31724cda074e 100644
> --- a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
> +++ b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
> @@ -39,7 +39,7 @@ properties:
> Should contain all of the per-channel DMA interrupts in
> ascending order with respect to the DMA channel index.
> minItems: 1
> - maxItems: 31
> + maxItems: 32
>
> resets:
> maxItems: 1
> @@ -52,6 +52,9 @@ properties:
>
> dma-coherent: true
>
> + dma-channel-mask:
> + maxItems: 1
> +
> required:
> - compatible
> - reg
> @@ -60,6 +63,7 @@ required:
> - reset-names
> - "#dma-cells"
> - iommus
> + - dma-channel-mask
>
> additionalProperties: false
>
> @@ -108,5 +112,6 @@ examples:
> #dma-cells = <1>;
> iommus = <&smmu TEGRA186_SID_GPCDMA_0>;
> dma-coherent;
> + dma-channel-mask = <0xfffffffe>;
> };
> ...
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Thanks!
Jon
--
nvpublic