---

yaml
---
r: 294173
b: refs/heads/master
c: ac8d91c
h: refs/heads/master
i:
  294171: b93d5b6
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6ff7373809a9b4eb644d83e2e299da297e1cbffa
+refs/heads/master: ac8d91c801905a061ca883dca427a5e19602a1e7

trunk/drivers/base/regmap/internal.h

@@ -87,7 +87,7 @@ struct regcache_ops {
 	int (*exit)(struct regmap *map);
 	int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
 	int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
-	int (*sync)(struct regmap *map);
+	int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
 };
 
 bool regmap_writeable(struct regmap *map, unsigned int reg);

trunk/drivers/base/regmap/regcache-lzo.c

@@ -331,15 +331,21 @@ static int regcache_lzo_write(struct regmap *map,
 	return ret;
 }
 
-static int regcache_lzo_sync(struct regmap *map)
+static int regcache_lzo_sync(struct regmap *map, unsigned int min,
+			     unsigned int max)
 {
 	struct regcache_lzo_ctx **lzo_blocks;
 	unsigned int val;
 	int i;
 	int ret;
 
 	lzo_blocks = map->cache;
-	for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) {
+	i = min;
+	for_each_set_bit_from(i, lzo_blocks[0]->sync_bmp,
+			      lzo_blocks[0]->sync_bmp_nbits) {
+		if (i > max)
+			continue;
+
 		ret = regcache_read(map, i, &val);
 		if (ret)
 			return ret;

trunk/drivers/base/regmap/regcache-rbtree.c

@@ -357,20 +357,39 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
 	return 0;
 }
 
-static int regcache_rbtree_sync(struct regmap *map)
+static int regcache_rbtree_sync(struct regmap *map, unsigned int min,
+				unsigned int max)
 {
 	struct regcache_rbtree_ctx *rbtree_ctx;
 	struct rb_node *node;
 	struct regcache_rbtree_node *rbnode;
 	unsigned int regtmp;
 	unsigned int val;
 	int ret;
-	int i;
+	int i, base, end;
 
 	rbtree_ctx = map->cache;
 	for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) {
 		rbnode = rb_entry(node, struct regcache_rbtree_node, node);
-		for (i = 0; i < rbnode->blklen; i++) {
+
+		if (rbnode->base_reg < min)
+			continue;
+		if (rbnode->base_reg > max)
+			break;
+		if (rbnode->base_reg + rbnode->blklen < min)
+			continue;
+
+		if (min < rbnode->base_reg + rbnode->blklen)
+			base = min - rbnode->base_reg;
+		else
+			base = 0;
+
+		if (max < rbnode->base_reg + rbnode->blklen)
+			end = rbnode->base_reg + rbnode->blklen - max;
+		else
+			end = rbnode->blklen;
+
+		for (i = base; i < end; i++) {
 			regtmp = rbnode->base_reg + i;
 			val = regcache_rbtree_get_register(rbnode, i,
 							   map->cache_word_size);

trunk/drivers/base/regmap/regcache.c

@@ -283,7 +283,7 @@ int regcache_sync(struct regmap *map)
 	}
 	map->cache_bypass = 0;
 
-	ret = map->cache_ops->sync(map);
+	ret = map->cache_ops->sync(map, 0, map->max_register);
 
 	if (ret == 0)
 		map->cache_dirty = false;