regmap: debugfs: Suppress cache for partial register files
The cache is based on the full register map so confuses things if used
for a partial map.
Reported-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 23b701f5..6864009 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -84,6 +84,10 @@
unsigned int fpos_offset;
unsigned int reg_offset;
+ /* Suppress the cache if we're using a subrange */
+ if (from)
+ return from;
+
/*
* If we don't have a cache build one so we don't have to do a
* linear scan each time.