linux-kernel - Re: [PATCH] ASoC: fsl_ssi: remove explicit register defaults

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Message-ID: <CAOMZO5Bsy8DLNBKR77JFcihrrZp5mxN6BOJmte5uCXkwOfbzcg@mail.gmail.com>
Date:	Mon, 1 Feb 2016 19:34:15 -0200
From:	Fabio Estevam <festevam@...il.com>
To:	"Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
Cc:	Mark Brown <broonie@...nel.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	Timur Tabi <timur@...i.org>,
	Nicolin Chen <nicoleotsuka@...il.com>,
	Xiubo Li <Xiubo.Lee@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: fsl_ssi: remove explicit register defaults

On Mon, Feb 1, 2016 at 7:30 PM, Maciej S. Szmigiero
<mail@...iej.szmigiero.name> wrote:

> So can regcache initialization be changed to use register by register read
> in case raw read fails?
>
> Since other option for drivers like SSI which are memory mapped and
> don't offer ability to reset their register values to default would be to
> explicitly write driver hardcoded defaults also by doing
> register by register write on probe time.

Yes, I had to do the same for sgtl5000:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/sound/soc/codecs/sgtl5000.c?id=af8ee11209e749c75eabf32b2a4ca631f396acf8

Would this approach work here too?