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Commit a3c37741 authored by Mark Brown's avatar Mark Brown
Browse files

regmap: Skip hardware defaults for LZO caches 



Saves some I/O when resyncing; we assume that syncs start from the device
reset state.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent f0c2319f

drivers/base/regmap/regcache-lzo.c

+6 −0
Original line number Diff line number Diff line
@@ -343,6 +343,12 @@ static int regcache_lzo_sync(struct regmap *map) 
		ret = regcache_read(map, i, &val);

		if (ret)

			return ret;



		/* Is this the hardware default?  If so skip. */

		ret = regcache_lookup_reg(map, i);

		if (ret > 0 && val == map->reg_defaults[ret].def)

			continue;



		map->cache_bypass = 1;

		ret = _regmap_write(map, i, val);

		map->cache_bypass = 0;