ASoC: wm8978: Update to use maple tree register cache

The maple tree register cache is based on a much more modern data structure
than the rbtree cache and makes optimisation choices which are probably
more appropriate for modern systems than those made by the rbtree cache. In
v6.5 it has also acquired the ability to generate multi-register writes in
sync operations, bringing performance up to parity with the rbtree cache
there.

Update the wm8978 driver to use the more modern data structure.

Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230713-asoc-cirrus-maple-v1-42-a62651831735@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wm8978.c b/sound/soc/codecs/wm8978.c
index 5c829301cf4c4cb2d30c1d51cf249a2541fb5a06..718bfef302cc6373ee77f02b6b28e364d1715f64 100644 (file)
--- a/sound/soc/codecs/wm8978.c
+++ b/sound/soc/codecs/wm8978.c
@@ -1014,7 +1014,7 @@ static const struct regmap_config wm8978_regmap_config = {
        .max_register = WM8978_MAX_REGISTER,
        .volatile_reg = wm8978_volatile,
 
-       .cache_type = REGCACHE_RBTREE,
+       .cache_type = REGCACHE_MAPLE,
        .reg_defaults = wm8978_reg_defaults,
        .num_reg_defaults = ARRAY_SIZE(wm8978_reg_defaults),
 };