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 d3030d11961a8c10 ("ASoC: ak4642: Enable cache usage to fix crashes on resume") by Mark Brown broonie@kernel.org.
Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be --- Untested. --- sound/soc/codecs/wm8940.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c index f6f9395ea38ef88b..1c600819f7689b45 100644 --- a/sound/soc/codecs/wm8940.c +++ b/sound/soc/codecs/wm8940.c @@ -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,