regmap: Return a sensible error code if we fail to read the cache
If a register isn't cached then let callers know that so they can fall
back or error handle appropriately.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index c5379c8..409abd2 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -378,7 +378,7 @@
if (r)
return r - map->reg_defaults;
else
- return -1;
+ return -ENOENT;
}
int regcache_insert_reg(struct regmap *map, unsigned int reg,