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regmap: Skip read-only registers in regcache_sync()
regcache_sync() spews warnings when a value was cached for a read-only register as it tries to write all registers no matter whether they are writable or not. This patch adds regmap_wrtieable() checks for avoiding it in regcache_sync_block_single() and regcache_block_raw(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -608,7 +608,8 @@ static int regcache_sync_block_single(struct regmap *map, void *block,
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for (i = start; i < end; i++) {
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regtmp = block_base + (i * map->reg_stride);
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if (!regcache_reg_present(cache_present, i))
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if (!regcache_reg_present(cache_present, i) ||
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!regmap_writeable(map, regtmp))
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continue;
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val = regcache_get_val(map, block, i);
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@ -677,7 +678,8 @@ static int regcache_sync_block_raw(struct regmap *map, void *block,
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for (i = start; i < end; i++) {
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regtmp = block_base + (i * map->reg_stride);
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if (!regcache_reg_present(cache_present, i)) {
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if (!regcache_reg_present(cache_present, i) ||
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!regmap_writeable(map, regtmp)) {
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ret = regcache_sync_block_raw_flush(map, &data,
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base, regtmp);
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if (ret != 0)
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