regcache: Add ->populate() callback to separate from ->init()

In the future changes we would like to change the flow of the cache handling.
Add ->populate() callback in order to prepare for that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20251031080540.3970776-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 8d19a1414d5b2acb40386783f5480c431b243ac8..1477329410ec445663bcd855602a132dbc0d20d5 100644 (file)
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -186,6 +186,7 @@ struct regcache_ops {
        enum regcache_type type;
        int (*init)(struct regmap *map);
        int (*exit)(struct regmap *map);
+       int (*populate)(struct regmap *map);
 #ifdef CONFIG_DEBUG_FS
        void (*debugfs_init)(struct regmap *map);
 #endif

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 0392f5525cf307e9c7428e1108cdf08b16315a50..319c342bf5a064b1a5069ff83b602bb262fbb8d4 100644 (file)
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -222,8 +222,24 @@ int regcache_init(struct regmap *map, const struct regmap_config *config)
                if (ret)
                        goto err_free;
        }
+
+       if (map->num_reg_defaults && map->cache_ops->populate) {
+               dev_dbg(map->dev, "Populating %s cache\n", map->cache_ops->name);
+               map->lock(map->lock_arg);
+               ret = map->cache_ops->populate(map);
+               map->unlock(map->lock_arg);
+               if (ret)
+                       goto err_exit;
+       }
        return 0;
 
+err_exit:
+       if (map->cache_ops->exit) {
+               dev_dbg(map->dev, "Destroying %s cache\n", map->cache_ops->name);
+               map->lock(map->lock_arg);
+               ret = map->cache_ops->exit(map);
+               map->unlock(map->lock_arg);
+       }
 err_free:
        kfree(map->reg_defaults);
        if (map->cache_free)