Merge tag 'topic/introspection' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into HEAD

New interfaces to allow other subsystems to gather information about the
regmap, allowing them to build further subsystem specific generic
features on top of the regmap.

Merged into ASoC in order to allow us to implement SND_SOC_BYTES_MASK()
controls which need to know the word size of the underlying registers.

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 2cf4bbc5d30f..7ac234f0b1c5 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -730,6 +730,21 @@ out:
 }
 EXPORT_SYMBOL_GPL(regmap_register_patch);
 
+/*
+ * regmap_get_val_bytes(): Report the size of a register value
+ *
+ * Report the size of a register value, mainly intended to for use by
+ * generic infrastructure built on top of regmap.
+ */
+int regmap_get_val_bytes(struct regmap *map)
+{
+	if (map->format.format_write)
+		return -EINVAL;
+
+	return map->format.val_bytes;
+}
+EXPORT_SYMBOL_GPL(regmap_get_val_bytes);
+
 static int __init regmap_initcall(void)
 {
 	regmap_debugfs_initcall();