Mainly useful internally but exported since this is a public API that's
being checked for.

Signed-off-by: Mark Brown <[email protected]>
---
 drivers/base/regmap/regmap.c |   15 ++++++++++++---
 include/linux/regmap.h       |    1 +
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 9174c9d..9ab1e1f 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1097,6 +1097,17 @@ int _regmap_raw_write(struct regmap *map, unsigned int 
reg,
        return ret;
 }
 
+/**
+ * regmap_can_raw_write - Test if regmap_raw_write() is supported
+ *
+ * @map: Map to check.
+ */
+bool regmap_can_raw_write(struct regmap *map)
+{
+       return map->bus && map->format.format_val && map->format.format_reg;
+}
+EXPORT_SYMBOL_GPL(regmap_can_raw_write);
+
 static int _regmap_bus_formatted_write(void *context, unsigned int reg,
                                       unsigned int val)
 {
@@ -1220,12 +1231,10 @@ int regmap_raw_write(struct regmap *map, unsigned int 
reg,
 {
        int ret;
 
-       if (!map->bus)
+       if (!regmap_can_raw_write(map))
                return -EINVAL;
        if (val_len % map->format.val_bytes)
                return -EINVAL;
-       if (reg % map->reg_stride)
-               return -EINVAL;
 
        map->lock(map->lock_arg);
 
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index bf77dfd..02d84e2 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -389,6 +389,7 @@ int regmap_update_bits_check(struct regmap *map, unsigned 
int reg,
                             bool *change);
 int regmap_get_val_bytes(struct regmap *map);
 int regmap_async_complete(struct regmap *map);
+bool regmap_can_raw_write(struct regmap *map);
 
 int regcache_sync(struct regmap *map);
 int regcache_sync_region(struct regmap *map, unsigned int min,
-- 
1.7.10.4

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