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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-12-19 18:51:55 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-01-02 14:58:53 +0400
commit2ac902ce17f9dfa0d4d1f0818be147b5d2515fb7 (patch)
tree20edcdd038f298fca0e39b658a40620e48ea1504 /drivers/base/regmap/regcache.c
parenta49f0d1ea3ec94fc7cf33a7c36a16343b74bd565 (diff)
downloadlinux-2ac902ce17f9dfa0d4d1f0818be147b5d2515fb7.tar.xz
regmap: flat: Add flat cache type
While for I2C and SPI devices the overhead of using rbtree for devices with only one block of registers is negligible the same isn't always going to be true for MMIO devices where the I/O costs are very much lower. Cater for these devices by adding a simple flat array type for them where the lookups are simple array accesses, taking us right back to the original ASoC cache implementation. Thanks to Magnus Damm for the discussion which prompted this. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/base/regmap/regcache.c')
-rw-r--r--drivers/base/regmap/regcache.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 835883bda977..e69ff3e4742c 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -22,6 +22,7 @@
static const struct regcache_ops *cache_types[] = {
&regcache_rbtree_ops,
&regcache_lzo_ops,
+ &regcache_flat_ops,
};
static int regcache_hw_init(struct regmap *map)