ASoC: wm8940: 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 w8940 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-v1-39-a62651831735@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
index 53c27986d216f67e16db0e20fd2bddabe98daa14..b9432f8b64e5bc1a5c1379f9327b869ccd686dd8 100644 (file)
--- a/sound/soc/codecs/wm8940.c
+++ b/sound/soc/codecs/wm8940.c
@@ -815,7 +815,7 @@ static const struct regmap_config wm8940_regmap = {
        .max_register = WM8940_MONOMIX,
        .reg_defaults = wm8940_reg_defaults,
        .num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults),
-       .cache_type = REGCACHE_RBTREE,
+       .cache_type = REGCACHE_MAPLE,
 
        .readable_reg = wm8940_readable_register,
        .volatile_reg = wm8940_volatile_register,