linux-kernel - Re: [RESEND RFC PATCH 2/3] ASoC: mediatek: Add AFE connection control

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Date:	Tue, 21 Apr 2015 11:15:03 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Sascha Hauer <s.hauer@...gutronix.de>
Cc:	Koro Chen <koro.chen@...iatek.com>, robh+dt@...nel.org,
	matthias.bgg@...il.com, perex@...ex.cz, tiwai@...e.de,
	srv_heupstream@...iatek.com, linux-mediatek@...ts.infradead.org,
	galak@...eaurora.org, lgirdwood@...il.com,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [RESEND RFC PATCH 2/3] ASoC: mediatek: Add AFE connection control

On Tue, Apr 21, 2015 at 07:50:41AM +0200, Sascha Hauer wrote:

> Oh, that's not magic at all, the crossbar switch has inputs and outputs
> numbered from 0 to MTK_AFE_INTERCONN_NUM_INPUT /
> MTK_AFE_INTERCONN_NUM_OUTPUT (they have the same numbers in the
> datasheet. To connect input x with output y look at index [x][y] in the
> table and write the register values found at that place. If .creg is 0x0
> then it's not possible to connect the given input with the given output.

A comment saying that would help then.

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