regmap: Warn on raw I/O as well as bulk reads that bypass cache

As with the bulk reads we really should be able to make these play
nicely with the cache but warn for now.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>

drivers/base/regmap/regmap.c

@@ -377,6 +377,8 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
 {
 	int ret;
 
+	WARN_ON(map->cache_type != REGCACHE_NONE);
+
 	mutex_lock(&map->lock);
 
 	ret = _regmap_raw_write(map, reg, val, val_len);
@@ -481,6 +483,8 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 {
 	int ret;
 
+	WARN_ON(map->cache_type != REGCACHE_NONE);
+
 	mutex_lock(&map->lock);
 
 	ret = _regmap_raw_read(map, reg, val, val_len);