Commit 35ddb157 authored by Marek Vasut's avatar Marek Vasut Committed by Mark Brown

ASoC: fsl_spdif: use flat regmap cache

Same as commit ce492b3b
Subject: drm/fsl-dcu: use flat regmap cache

Using flat regmap cache instead of RB-tree to avoid the following
lockdep warning on driver load:
WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:2871 lockdep_trace_alloc+0x104/0x128
DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags))

The RB-tree regmap cache needs to allocate new space on first
writes. However, allocations in an atomic context (e.g. when a
spinlock is held) are not allowed. The function regmap_write
calls map->lock, which acquires a spinlock in the fast_io case.
Since the driver uses MMIO, the regmap bus of type regmap_mmio
is being used which has fast_io set to true.
Signed-off-by: default avatarMarek Vasut <marex@denx.de>
Acked-by: default avatarNicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 0effb865
...@@ -1103,7 +1103,7 @@ static const struct regmap_config fsl_spdif_regmap_config = { ...@@ -1103,7 +1103,7 @@ static const struct regmap_config fsl_spdif_regmap_config = {
.readable_reg = fsl_spdif_readable_reg, .readable_reg = fsl_spdif_readable_reg,
.volatile_reg = fsl_spdif_volatile_reg, .volatile_reg = fsl_spdif_volatile_reg,
.writeable_reg = fsl_spdif_writeable_reg, .writeable_reg = fsl_spdif_writeable_reg,
.cache_type = REGCACHE_RBTREE, .cache_type = REGCACHE_FLAT,
}; };
static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv, static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
......
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