1 files changed, 17 insertions, 1 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index b7e95bf942c9..28dde941c783 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -127,7 +127,18 @@ typedef void (*regmap_unlock)(void *);
  * @lock_arg:     this field is passed as the only argument of lock/unlock
  *                functions (ignored in case regular lock/unlock functions
  *                are not overridden).
- *
+ * @reg_read:     Optional callback that if filled will be used to perform
+ *                all the reads from the registers. Should only be provided for
+ *                devices whos read operation cannot be represented as a simple read
+ *                operation on a bus such as SPI, I2C, etc. Most of the devices do
+ *                not need this.
+ * @reg_write:    Same as above for writing.
+ * @fast_io:      Register IO is fast. Use a spinlock instead of a mutex
+ *                to perform locking. This field is ignored if custom lock/unlock
+ *                functions are used (see fields lock/unlock of struct regmap_config).
+ *                This field is a duplicate of a similar file in
+ *                'struct regmap_bus' and serves exact same purpose.
+ *                 Use it only for "no-bus" cases.
  * @max_register: Optional, specifies the maximum valid register index.
  * @wr_table:     Optional, points to a struct regmap_access_table specifying
  *                valid ranges for write access.
@@ -177,6 +188,11 @@ struct regmap_config {
         regmap_unlock unlock;
         void *lock_arg;
 
+        int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
+        int (*reg_write)(void *context, unsigned int reg, unsigned int val);
+
+        bool fast_io;
+
         unsigned int max_register;
         const struct regmap_access_table *wr_table;
         const struct regmap_access_table *rd_table;