regmap: core: Provide regmap_can_raw_write() operation

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

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 9174c9d45a16..9ab1e1fedbc9 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);