linux-kernel - regmap: no indexed caching?

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Message-ID: <20120119113708.GC2630@pengutronix.de>
Date:	Thu, 19 Jan 2012 12:37:08 +0100
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	linux-kernel@...r.kernel.org
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: regmap: no indexed caching?

Hi,

indexed caching was removed from regmap (commit 4c691664583ef6a91f9ed0e08a75fbd30a5ffd5c)
saying:

    There should be no situation where it offers any advantage over rbtree
    and there are no current users so remove the code for simplicity.

What about devices having just a few registers (4 in my case)? I'd think
there are a number of such devices not yet converted to regmap. Is it
assumed that the additional overhead from rbtree-caching will make up
for the code saved?

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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