Commit 19254411 authored Nov 16, 2011 by Lars-Peter Clausen Committed by Mark Brown Nov 16, 2011

regmap: Try cached read before checking if a hardware read is possible

For some register format types we do not provide a parse_val so we can not do a
hardware read. But a cached read is still possible, so try to read from the
cache first, before checking whether a hardware read is possible. Otherwise the
cache becomes pretty useless for these register types.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

parent 720e4616

drivers/base/regmap/regmap.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -434,15 +434,15 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
		{
		int ret;

		if (!map->format.parse_val)
		return -EINVAL;

		if (!map->cache_bypass) {
		ret = regcache_read(map, reg, val);
		if (ret == 0)
		return 0;
		}

		if (!map->format.parse_val)
		return -EINVAL;

		if (map->cache_only)
		return -EBUSY;