[PATCH v1 1/4] regcache: Add ->populate() callback to separate from ->init()

Andy Shevchenko
2025-10-29T07:31:36Z

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>
---
drivers/base/regmap/internal.h | 1 +
drivers/base/regmap/regcache.c | 16 ++++++++++++++++
2 files changed, 17 insertions(+)

diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 6f31240ee4a9..6efed02c21c5 100644
--- 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 c7650fa434ad..149945690cdf 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -221,8 +221,24 @@ 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)
--
2.50.1