Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd

[pandora-kernel.git] / drivers / base / regmap / regmap.c

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index d786ddc..bf441db 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/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);
@@ -480,6 +482,14 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
                    size_t val_len)
 {
        int ret;
+       int i;
+       bool vol = true;
+
+       for (i = 0; i < val_len / map->format.val_bytes; i++)
+               if (!regmap_volatile(map, reg + i))
+                       vol = false;
+
+       WARN_ON(!vol && map->cache_type != REGCACHE_NONE);
 
        mutex_lock(&map->lock);
 
@@ -507,18 +517,30 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 {
        int ret, i;
        size_t val_bytes = map->format.val_bytes;
-
-       WARN_ON(map->cache_type != REGCACHE_NONE);
+       bool vol = true;
 
        if (!map->format.parse_val)
                return -EINVAL;
 
-       ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
-       if (ret != 0)
-               return ret;
+       /* Is this a block of volatile registers? */
+       for (i = 0; i < val_count; i++)
+               if (!regmap_volatile(map, reg + i))
+                       vol = false;
+
+       if (vol || map->cache_type == REGCACHE_NONE) {
+               ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
+               if (ret != 0)
+                       return ret;
 
-       for (i = 0; i < val_count * val_bytes; i += val_bytes)
-               map->format.parse_val(val + i);
+               for (i = 0; i < val_count * val_bytes; i += val_bytes)
+                       map->format.parse_val(val + i);
+       } else {
+               for (i = 0; i < val_count; i++) {
+                       ret = regmap_read(map, reg + i, val + (i * val_bytes));
+                       if (ret != 0)
+                               return ret;
+               }
+       }
 
        return 0;
 }