regmap: add regmap_parse_val api

    In some cases, we need regmap's format parse_val function
to do be/le translation according to the bus configuration.
For example, snd_soc_bytes_put() uses regmap to write/read values,
and use cpu_to_be() directly to covert MASK into big endian. This
is a defect, and should use regmap's format function to do it according
to bus configuration.

Signed-off-by: Nenghua Cao <nhcao@marvell.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

2 files changed, 21 insertions, 0 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 6a19515f8a45..4b2ed0c9e80d 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2240,6 +2240,18 @@ int regmap_get_val_bytes(struct regmap *map)
 }
 EXPORT_SYMBOL_GPL(regmap_get_val_bytes);
 
+int regmap_parse_val(struct regmap *map, const void *buf,
+                        unsigned int *val)
+{
+        if (!map->format.parse_val)
+                return -EINVAL;
+
+        *val = map->format.parse_val(buf);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(regmap_parse_val);
+
 static int __init regmap_initcall(void)
 {
         regmap_debugfs_initcall();
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 4149f1a9b003..3e1a2e4a92ad 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -423,6 +423,8 @@ bool regmap_check_range_table(struct regmap *map, unsigned int reg,
 
 int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
                           int num_regs);
+int regmap_parse_val(struct regmap *map, const void *buf,
+                                unsigned int *val);
 
 static inline bool regmap_reg_in_range(unsigned int reg,
                                        const struct regmap_range *range)
@@ -695,6 +697,13 @@ static inline int regmap_register_patch(struct regmap *map,
         return -EINVAL;
 }
 
+static inline int regmap_parse_val(struct regmap *map, const void *buf,
+                                unsigned int *val)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
 static inline struct regmap *dev_get_regmap(struct device *dev,
                                             const char *name)
 {