linux-kernel - Re: [PATCH 1/3] Documentation: dt: iio: at91-sama5d2_adc: add optional dma property

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Date:   Thu, 17 Aug 2017 10:10:59 -0500
From:   Rob Herring <robh@...nel.org>
To:     Eugen Hristev <eugen.hristev@...rochip.com>
Cc:     nicolas.ferre@...rochip.com, ludovic.desroches@...rochip.com,
        linux-iio@...r.kernel.org, jic23@...nel.org,
        alexandre.belloni@...e-electrons.com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, lars@...afoo.de
Subject: Re: [PATCH 1/3] Documentation: dt: iio: at91-sama5d2_adc: add
 optional dma property

On Thu, Aug 10, 2017 at 03:34:57PM +0300, Eugen Hristev wrote:
> Added property for DMA configuration of the device.

"dt-bindings: iio: ..." is preferred for subject.

> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
> ---
>  Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt b/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
> index 552e7a8..5f94d47 100644
> --- a/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
> +++ b/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
> @@ -17,6 +17,11 @@ Required properties:
>    This property uses the IRQ edge types values: IRQ_TYPE_EDGE_RISING ,
>    IRQ_TYPE_EDGE_FALLING or IRQ_TYPE_EDGE_BOTH
>  
> +Optional properties:
> +  - dmas: Phandle to dma channel for the ADC.
> +  See ../../dma/dma.txt for details.
> +  - dma-names: Must be "rx" when dmas property is being used.

*-names is pointless when there's only one.

> +
>  Example:
>  
>  adc: adc@...30000 {
> @@ -31,4 +36,6 @@ adc: adc@...30000 {
>  	vddana-supply = <&vdd_3v3_lp_reg>;
>  	vref-supply = <&vdd_3v3_lp_reg>;
>  	atmel,trigger-edge-type = <IRQ_TYPE_EDGE_BOTH>;
> +	dmas = <&dma0 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | AT91_XDMAC_DT_PERID(25))>;
> +	dma-names = "rx";
>  }
> -- 
> 2.7.4
> 
> 
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> linux-arm-kernel@...ts.infradead.org
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