regulator: core: Provide standard enable operations for regmap users

Since the enable(), disable() and is_enabled() operations for most regmap
based regulators come down to reading and updating a single register bit
we can factor out the code and allow these drivers to just define which
bit to update using the enable_reg and enable_mask fields in their desc
and then use operations provided by the core.

As well as the code saving this opens the door to future optimisation of
the bulk operations - if the core can realise that we are updating a
single register for multiple regulators then it should be able to combine
these updates into a single physical operation.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index d1c238970a6e..8160bc87be28 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -167,6 +167,8 @@ enum regulator_type {
 
  * @vsel_reg: Register for selector when using regulator_regmap_X_voltage_
  * @vsel_mask: Mask for register bitfield used for selector
+ * @enable_reg: Register for control when using regmap enable/disable ops
+ * @enable_mask: Mask for control when using regmap enable/disable ops
  */
 struct regulator_desc {
         const char *name;
@@ -180,6 +182,8 @@ struct regulator_desc {
 
         unsigned int vsel_reg;
         unsigned int vsel_mask;
+        unsigned int enable_reg;
+        unsigned int enable_mask;
 };
 
 /**
@@ -258,6 +262,9 @@ int regulator_mode_to_status(unsigned int);
 
 int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev);
 int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel);
+int regulator_is_enabled_regmap(struct regulator_dev *rdev);
+int regulator_enable_regmap(struct regulator_dev *rdev);
+int regulator_disable_regmap(struct regulator_dev *rdev);
 
 void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);