diff options
Diffstat (limited to 'drivers/base/regmap/regcache-rbtree.c')
| -rw-r--r-- | drivers/base/regmap/regcache-rbtree.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index 861ad2c..8d51916 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -357,7 +357,8 @@ 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; @@ -365,12 +366,30 @@ static int regcache_rbtree_sync(struct regmap *map) 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) + 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); |
