Commit f6291044 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Greg Kroah-Hartman

ASoC: ak4613: Enable cache usage to fix crashes on resume

[ Upstream commit dcd2d1f7 ]

During system resume:

    kernel BUG at drivers/base/regmap/regcache.c:347!
    ...
    PC is at regcache_sync+0x1c/0x128
    LR is at ak4613_resume+0x28/0x34

The ak4613 driver is using a regmap cache sync to restore the
configuration of the chip on resume but does not actually define a
register cache which means that the resume 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 <broonie@kernel.org>.
Signed-off-by: 's avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: 's avatarMark Brown <broonie@kernel.org>
Signed-off-by: 's avatarSasha Levin <sashal@kernel.org>
parent 1c84d14e
......@@ -143,6 +143,7 @@ static const struct regmap_config ak4613_regmap_cfg = {
.max_register = 0x16,
.reg_defaults = ak4613_reg,
.num_reg_defaults = ARRAY_SIZE(ak4613_reg),
.cache_type = REGCACHE_RBTREE,
};
static const struct of_device_id ak4613_of_match[] = {
......
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