regcache_mark_dirty(9)

regcache_mark_dirty(9) 🧚

okay bestie, welcome to the Kernel API Manual — this page is short, iconic, and lowkey carrying the whole resume flow on its back. 💅

✨ NAME ✨

regcache_mark_dirty — Indicate that HW registers were reset to default values.

🎀 SYNOPSIS 🎀

void regcache_mark_dirty (struct regmap *map );

🫶 ARGUMENTS 🫶

• map — map to mark. That’s the map you’re marking, periodt. 💖

🌈 DESCRIPTION 🌈

So basically: this tells regcache that the device has been powered down or reset. The whole point is that on resume, regcache_sync knows to write out all the non-default values stored in the cache. Slay. ✨

If this function is not called, regcache_sync will assume that the hardware state still matches the cache state, modulo any writes that happened when cache_only was true. Not me warning you bestie — that’s just how it is. 😭

🦋 SEE ALSO 🦋

Kernel file: ./drivers/base/regmap/regcache.c

• regcache_read(9)
• regcache_write(9)
• regcache_sync(9)
• regcache_sync_region(9)
• regcache_drop_region(9)
• regcache_cache_only(9)
• regcache_cache_bypass(9)
• regcache_reg_cached(9)

mwah 💋 this little page lives at source ./drivers/base/regmap, version regcache_mark_dirty(9), and it’s dated October 2026. no cap. 🫶