linux-kernel - Re: [PATCH 01/10] ASoC: wm8510: Convert to snd_soc_cache

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Message-ID: <20111006132211.GB16404@opensource.wolfsonmicro.com>
Date:	Thu, 6 Oct 2011 14:22:11 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Ian Lartey <ian@...nsource.wolfsonmicro.com>,
	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>, alsa-devel@...a-project.org
Subject: Re: [PATCH 01/10] ASoC: wm8510: Convert to snd_soc_cache_sync

On Thu, Oct 06, 2011 at 02:11:43PM +0800, Axel Lin wrote:

> +static int wm8510_volatile_register(struct snd_soc_codec *codec,
> +				    unsigned int reg)
> +{
> +	switch (reg) {
> +	case WM8510_RESET:
> +		return 1;
> +	default:
> +		return 0;
> +	}
> +}
> +

This is wrong in quite a few of the patches - all the 7, 9 CODECs are
write only, there's no readback support at all (in general if the driver
isn't actully verifying a device ID or otherwise doing a physical read
then it probably doesn't support readback).
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