[PATCH 3/4] dt-bindings: media: Add Aspeed Video Engine binding documentation

Rob Herring robh at kernel.org
Mon Sep 3 17:50:18 PDT 2018


On Wed, Aug 29, 2018 at 04:09:32PM -0500, Eddie James wrote:
> Document the bindings.
> 
> Signed-off-by: Eddie James <eajames at linux.vnet.ibm.com>
> ---
>  .../devicetree/bindings/media/aspeed-video.txt     | 23 ++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/aspeed-video.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/aspeed-video.txt b/Documentation/devicetree/bindings/media/aspeed-video.txt
> new file mode 100644
> index 0000000..58c056a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/aspeed-video.txt
> @@ -0,0 +1,23 @@
> +* Device tree bindings for Aspeed Video Engine
> +
> +The Video Engine (VE) embedded in the Aspeed AST2400 and AST2500 SOCs can
> +capture and compress video data from digital or analog sources.
> +
> +Required properties:
> + - compatible:		"aspeed,ast2400-video" or "aspeed,ast2500-video"

Maybe "video-engine" or "ve" would be more specific than just "video". 
Use what is closest to the name of the block.

> + - reg:			contains the offset and length of the VE memory region
> + - clocks:		pointers to the the "vclk" and "eclk" of the syscon

No pointers in DT. "Clock specifier"

> + - clock-names:		"vclk-gate", "eclk-gate"

Is that the name at or in the module? The fact that it is gated is 
really outside the block and a property of the clock controller.

> + - resets:		pointer to the VE reset of the syscon
> + - interrupts:		the interrupt associated with the VE on this platform
> +
> +Example:
> +
> +video: video at 1e700000 {

video-codec at ...

> +    compatible = "aspeed,ast2500-video";
> +    reg = <0x1e700000 0x20000>;
> +    clocks = <&syscon ASPEED_CLK_GATE_VCLK>, <&syscon ASPEED_CLK_GATE_ECLK>;
> +    clock-names = "vclk-gate", "eclk-gate";
> +    resets = <&syscon ASPEED_RESET_VIDEO>;
> +    interrupts = <7>;
> +};
> -- 
> 1.8.3.1
> 




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