regcache: flat: Split ->populate() from ->init()

Split ->populate() implementation from ->init() code.
This decoupling will help for the further changes.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20251031080540.3970776-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: andy-shev

drivers/base/regmap/regcache-flat.c

@@ -29,7 +29,6 @@ struct regcache_flat_data {
 
 static int regcache_flat_init(struct regmap *map)
 {
-	int i;
 	unsigned int cache_size;
 	struct regcache_flat_data *cache;
 
@@ -47,14 +46,6 @@ static int regcache_flat_init(struct regmap *map)
 
 	map->cache = cache;
 
-	for (i = 0; i < map->num_reg_defaults; i++) {
-		unsigned int reg = map->reg_defaults[i].reg;
-		unsigned int index = regcache_flat_get_index(map, reg);
-
-		cache->data[index] = map->reg_defaults[i].def;
-		__set_bit(index, cache->valid);
-	}
-
 	return 0;
 
 err_free:
@@ -75,6 +66,22 @@ static int regcache_flat_exit(struct regmap *map)
 	return 0;
 }
 
+static int regcache_flat_populate(struct regmap *map)
+{
+	struct regcache_flat_data *cache = map->cache;
+	unsigned int i;
+
+	for (i = 0; i < map->num_reg_defaults; i++) {
+		unsigned int reg = map->reg_defaults[i].reg;
+		unsigned int index = regcache_flat_get_index(map, reg);
+
+		cache->data[index] = map->reg_defaults[i].def;
+		__set_bit(index, cache->valid);
+	}
+
+	return 0;
+}
+
 static int regcache_flat_read(struct regmap *map,
 			      unsigned int reg, unsigned int *value)
 {
@@ -134,6 +141,7 @@ struct regcache_ops regcache_flat_ops = {
 	.name = "flat",
 	.init = regcache_flat_init,
 	.exit = regcache_flat_exit,
+	.populate = regcache_flat_populate,
 	.read = regcache_flat_read,
 	.write = regcache_flat_write,
 };
@@ -143,6 +151,7 @@ struct regcache_ops regcache_flat_sparse_ops = {
 	.name = "flat-sparse",
 	.init = regcache_flat_init,
 	.exit = regcache_flat_exit,
+	.populate = regcache_flat_populate,
 	.read = regcache_flat_sparse_read,
 	.write = regcache_flat_write,
 	.drop = regcache_flat_drop,