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Date:	Fri, 04 Apr 2014 09:31:32 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Arun Shamanna Lakshmi <aruns@...dia.com>
CC:	"lgirdwood@...il.com" <lgirdwood@...il.com>,
	"broonie@...nel.org" <broonie@...nel.org>,
	"swarren@...dotorg.org" <swarren@...dotorg.org>,
	"perex@...ex.cz" <perex@...ex.cz>, "tiwai@...e.de" <tiwai@...e.de>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Songhee Baek <sbaek@...dia.com>
Subject: Re: [PATCH] ASoC: dapm: Add support for multi register mux

On 04/03/2014 10:11 PM, Arun Shamanna Lakshmi wrote:
[...]
>> Here as well, default for bit_pos should be 0.
>
> This means when 'None' of the options are selected, by default, it
> enumerates to 0. Since we are using __ffs, BIT(0) of Register-0 also
> enumerates to 0. That's the reason why I used just ffs in the first place.
> Let me know your opinion. My value table looks like below.
>
> #define MUX_VALUE(npart, nbit)	(nbit + 32 * npart)
> static const int mux_values[] = {
> 	0,
> 	MUX_VALUE(0, 0),
> 	.
> 	.
> 	.
> 	MUX_VALUE(0, 31),
> 	/* above inputs are for part0 mux */
> 	MUX_VALUE(1, 0),
> 	.
> 	.
> 	.
> 	MUX_VALUE(1, 31),
> 	/* above inputs are for part1 mux */
> 	MUX_VALUE(2, 0),
> 	.
> 	.
> 	.
> 	MUX_VALUE(2, 31),
> 	/* above inputs are for part2 mux */
> };

Ok, so having none of the input selected should be a valid user selectable 
option?
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