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ASoC: tegra: Fix uninitialized flat cache warning in tegra210_ahub

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The tegra210_ahub driver started triggering a warning after commit
e062bdfdd6ad ("regmap: warn users about uninitialized flat cache"),
which flags drivers using REGCACHE_FLAT without register defaults.
Since the driver omits default definitions because its registers are
zero initialized, the following warning is shown:

  WARNING KERN tegra210-ahub 2900800.ahub: using zero-initialized flat cache, this may cause unexpected behavior

Switch to REGCACHE_FLAT_S which is the recommended cache type for
sparse register maps without defaults. This cache type initializes
entries on-demand from hardware, eliminating the warning while using
memory efficiently.

Signed-off-by: sheetal <sheetal@nvidia.com>
Link: https://patch.msgid.link/20251208052040.4025612-1-sheetal@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
sheetal 2025-12-08 10:50:40 +05:30 committed by Mark Brown
parent 8f0b4cce44
commit 4d4021b0bb
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GPG Key ID: 24D68B725D5487D0
1 changed files with 3 additions and 3 deletions
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6
sound/soc/tegra/tegra210_ahub.c
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@ -2077,7 +2077,7 @@ static const struct regmap_config tegra210_ahub_regmap_config = {
.val_bits = 32,
.reg_stride = 4,
.max_register = TEGRA210_MAX_REGISTER_ADDR,
.cache_type = REGCACHE_FLAT,
.cache_type = REGCACHE_FLAT_S,
};
static const struct regmap_config tegra186_ahub_regmap_config = {
@ -2085,7 +2085,7 @@ static const struct regmap_config tegra186_ahub_regmap_config = {
.val_bits = 32,
.reg_stride = 4,
.max_register = TEGRA186_MAX_REGISTER_ADDR,
.cache_type = REGCACHE_FLAT,
.cache_type = REGCACHE_FLAT_S,
};
static const struct regmap_config tegra264_ahub_regmap_config = {
@ -2094,7 +2094,7 @@ static const struct regmap_config tegra264_ahub_regmap_config = {
.reg_stride = 4,
.writeable_reg = tegra264_ahub_wr_reg,
.max_register = TEGRA264_MAX_REGISTER_ADDR,
.cache_type = REGCACHE_FLAT,
.cache_type = REGCACHE_FLAT_S,
};
static const struct tegra_ahub_soc_data soc_data_tegra210 = {