regmap: allow regmap instances to be named

Some devices have multiple separate register regions. Logically, one
regmap would be created per region. One issue that prevents this is that
each instance will attempt to create the same debugfs files. Avoid this
by allowing regmaps to be named, and use the name to construct the
debugfs directory name.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 58517a5dac13..9715e8e44506 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -248,10 +248,17 @@ static const struct file_operations regmap_access_fops = {
         .llseek = default_llseek,
 };
 
-void regmap_debugfs_init(struct regmap *map)
+void regmap_debugfs_init(struct regmap *map, const char *name)
 {
-        map->debugfs = debugfs_create_dir(dev_name(map->dev),
-                                          regmap_debugfs_root);
+        if (name) {
+                map->debugfs_name = kasprintf(GFP_KERNEL, "%s-%s",
+                                              dev_name(map->dev), name);
+                name = map->debugfs_name;
+        } else {
+                name = dev_name(map->dev);
+        }
+
+        map->debugfs = debugfs_create_dir(name, regmap_debugfs_root);
         if (!map->debugfs) {
                 dev_warn(map->dev, "Failed to create debugfs directory\n");
                 return;
@@ -280,6 +287,7 @@ void regmap_debugfs_init(struct regmap *map)
 void regmap_debugfs_exit(struct regmap *map)
 {
         debugfs_remove_recursive(map->debugfs);
+        kfree(map->debugfs_name);
 }
 
 void regmap_debugfs_initcall(void)