regcache: Warn if regcache_sync() is called in cache_only mode

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Calling regcache_sync() while cache_only is enabled is invalid API
usage, since writes are intentionally kept in the cache and cannot
be synchronized to hardware.
Document that callers must disable cache_only before calling
regcache_sync(), and reject incorrect usage with a WARN_ON() and
-EINVAL.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260720033238.52479-1-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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bui duc phuc 2026-07-20 10:32:37 +07:00 • committed by Mark Brown

parent 1590cf0329

commit 86fc3483a4

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drivers/base/regmap/regcache.c

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