regmap: Implement regmap_multi_reg_read()

Merge series from Guenter Roeck <linux@roeck-us.net>:

regmap_multi_reg_read() is similar to regmap_bilk_read() but reads from
an array of non-sequential registers. It is helpful if multiple non-
sequential registers need to be read in a single operation which would
otherwise have to be mutex protected.

The name of the new function was chosen to match the existing function
regmap_multi_reg_write().

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 2da1cfc52233..122e38161acb 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1237,6 +1237,8 @@ int regmap_noinc_read(struct regmap *map, unsigned int reg,
 		      void *val, size_t val_len);
 int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 		     size_t val_count);
+int regmap_multi_reg_read(struct regmap *map, unsigned int *reg, void *val,
+			  size_t val_count);
 int regmap_update_bits_base(struct regmap *map, unsigned int reg,
 			    unsigned int mask, unsigned int val,
 			    bool *change, bool async, bool force);