regmap: Clean up _regmap_update_bits()

Since sometimes the 'config' parameter has no use, it should be NULL.
And make the code simplifier.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index b897c1a88b56..9a426c081484 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1969,9 +1969,11 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 
         if (tmp != orig) {
                 ret = _regmap_write(map, reg, tmp);
-                *change = true;
+                if (change)
+                        *change = true;
         } else {
-                *change = false;
+                if (change)
+                        *change = false;
         }
 
         return ret;
@@ -1990,11 +1992,10 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 int regmap_update_bits(struct regmap *map, unsigned int reg,
                        unsigned int mask, unsigned int val)
 {
-        bool change;
         int ret;
 
         map->lock(map->lock_arg);
-        ret = _regmap_update_bits(map, reg, mask, val, &change);
+        ret = _regmap_update_bits(map, reg, mask, val, NULL);
         map->unlock(map->lock_arg);
 
         return ret;
@@ -2019,14 +2020,13 @@ EXPORT_SYMBOL_GPL(regmap_update_bits);
 int regmap_update_bits_async(struct regmap *map, unsigned int reg,
                              unsigned int mask, unsigned int val)
 {
-        bool change;
         int ret;
 
         map->lock(map->lock_arg);
 
         map->async = true;
 
-        ret = _regmap_update_bits(map, reg, mask, val, &change);
+        ret = _regmap_update_bits(map, reg, mask, val, NULL);
 
         map->async = false;