linux-kernel - Re: [PATCH RFC 1/1] ASoC: fsl_ssi: Make fifo watermark and maxburst settings device tree options

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Date:	Thu, 14 Jan 2016 19:31:19 -0600
From:	Timur Tabi <timur@...i.org>
To:	Nicolin Chen <nicoleotsuka@...il.com>,
	Caleb Crome <caleb@...me.org>
Cc:	Xiubo Li <Xiubo.Lee@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [PATCH RFC 1/1] ASoC: fsl_ssi: Make fifo watermark and maxburst
 settings device tree options

Nicolin Chen wrote:
> I think DT maintainers may not give a consent towards these two
> properties as they are not to describe the hardware but to hack
> software configurations. (And it seems you haven't CCed them.)

I admit it's a grey area, but the hardware doesn't work if you use the 
wrong value, and it is a fixed value per device.  A p1022ds would use a 
different value than in in i.MX6, and once you pick a value, it's the 
same no matter which sample rate, buffer size, etc you choose.