linux-kernel - Re: [PATCH 3/3] ASoC: fsl_ssi: remove register defaults

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Date:	Mon, 11 Jan 2016 19:53:43 -0600
From:	Timur Tabi <timur@...i.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	"Maciej S. Szmigiero" <mail@...iej.szmigiero.name>,
	Fabio Estevam <festevam@...il.com>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.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 3/3] ASoC: fsl_ssi: remove register defaults

Mark Brown wrote:
> Quite possibly (it'll be more efficient and it's intended for such use
> cases) but as I said in my other reply that then has the issue that it
> implicitly gives default values to all the registers so I'd expect we
> still need to handle the cache initialisation explicitly (or
> alternatively the hardware sync with the cache on startup).

Why does REGCACHE_FLAT assume that all registers have a default value of 
0?  Shouldn't it have the same behavior w.r.t. cache values as 
REGCACHE_RBTREE?