Commit f2985367 authored Apr 30, 2012 by Mark Brown

regmap: Cache single values read from the chip

If we don't have a cached value for a register and we can cache it then
when we do a read a value we should add it to the cache to save rereading
it later on. Do this for single register reads, for block reads the code
would be a little more complex and this covers most practical usage.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

parent d939fb9a

drivers/base/regmap/regmap.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -698,6 +698,9 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
		trace_regmap_reg_read(map->dev, reg, *val);
		}

		if (ret == 0 && !map->cache_bypass)
		regcache_write(map, reg, *val);

		return ret;
		}