Commit 796c9c01 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Greg Kroah-Hartman

ASoC: wm8940: Enable cache usage to fix crashes on resume

[ Upstream commit 50c7a0ef ]

The wm8940 driver is using a regmap cache sync to restore the
configuration of the chip when switching from OFF to STANDBY, but does
not actually define a register cache which means that the restore is
never going to work and we trigger asserts in regmap.  Fix this by
enabling caching.

Based on commit d3030d11 ("ASoC: ak4642: Enable cache usage to
fix crashes on resume") by Mark Brown <>.
Signed-off-by: default avatarGeert Uytterhoeven <>
Acked-by: default avatarCharles Keepax <>
Signed-off-by: default avatarMark Brown <>
Signed-off-by: default avatarSasha Levin <>
parent f6291044
......@@ -743,6 +743,7 @@ 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,
.readable_reg = wm8940_readable_register,
.volatile_reg = wm8940_volatile_register,
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