linux-kernel - Re: [PATCH v3 1/4] dt-bindings: iio: at91-sama5d2

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Date:   Wed, 15 Nov 2017 09:27:46 -0600
From:   Rob Herring <robh@...nel.org>
To:     Eugen Hristev <eugen.hristev@...rochip.com>
Cc:     nicolas.ferre@...rochip.com, alexandre.belloni@...e-electrons.com,
        linux-iio@...r.kernel.org, lars@...afoo.de,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, ludovic.desroches@...rochip.com,
        jic23@...nel.org
Subject: Re: [PATCH v3 1/4] dt-bindings: iio: at91-sama5d2_adc: add optional
 dma property

On Wed, Nov 15, 2017 at 02:56:45PM +0200, Eugen Hristev wrote:
> Added property for DMA configuration of the device.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
> ---
>  Changes in v3:
> None, but we discussed on the ML about whether we should have "dma-names"
> present in the binding even if it's only one.
> The helpers in the kernel to retrieve the channel info rely on the
> presence of this property, so I am resending the patch based on this.
> If another solution is better, please advise and I can try it and
> resend the patch.

Really the kernel APIs should accept a NULL name and return the DMA 
channel when there is only one. This is how the clk_get API works for 
example.

>  Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt | 7 +++++++
>  1 file changed, 7 insertions(+)

In any case, not really a big deal.

Acked-by: Rob Herring <robh@...nel.org>