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Date: Fri, 8 Feb 2013 11:46:55 +0000
From: Mark Brown <broonie@...nsource.wolfsonmicro.com>
To: Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>
Cc: linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com
Subject: Re: [PATCH v3] regmap: debugfs: Add a registers `range' file
On Fri, Feb 01, 2013 at 12:05:39PM +0000, Dimitris Papastamos wrote:
> +struct regmap_reg_range {
> + unsigned int start;
> + unsigned int end;
> + unsigned int attr;
> +};
> + i = start_reg;
> + while (i <= map->max_register) {
> + reg_attr = regmap_attr_bitmap(map, i);
> + switch (state) {
We're doing a linear scan through the entire register map here in order
to build up a list of which registers exist, doing it every time the
file is read. This data structure looks *very* like the one we have for
the reads themselves, it seems like we should be sharing the work here
and using the same cache.
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