regulator: core: Introduce set_load op

Expose the requested load directly to the regulator implementation for
hardware that does not support the normal enum based set_mode().

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index b899947..f245214 100644 (file)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -648,10 +648,12 @@ static int drms_uA_update(struct regulator_dev *rdev)
        if (err < 0)
                return 0;
 
-       if (!rdev->desc->ops->get_optimum_mode)
+       if (!rdev->desc->ops->get_optimum_mode &&
+           !rdev->desc->ops->set_load)
                return 0;
 
-       if (!rdev->desc->ops->set_mode)
+       if (!rdev->desc->ops->set_mode &&
+           !rdev->desc->ops->set_load)
                return -EINVAL;
 
        /* get output voltage */
@@ -676,22 +678,29 @@ static int drms_uA_update(struct regulator_dev *rdev)
        list_for_each_entry(sibling, &rdev->consumer_list, list)
                current_uA += sibling->uA_load;
 
-       /* now get the optimum mode for our new total regulator load */
-       mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV,
-                                                 output_uV, current_uA);
+       if (rdev->desc->ops->set_load) {
+               /* set the optimum mode for our new total regulator load */
+               err = rdev->desc->ops->set_load(rdev, current_uA);
+               if (err < 0)
+                       rdev_err(rdev, "failed to set load %d\n", current_uA);
+       } else {
+               /* now get the optimum mode for our new total regulator load */
+               mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV,
+                                                        output_uV, current_uA);
+
+               /* check the new mode is allowed */
+               err = regulator_mode_constrain(rdev, &mode);
+               if (err < 0) {
+                       rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV\n",
+                                current_uA, input_uV, output_uV);
+                       return err;
+               }
 
-       /* check the new mode is allowed */
-       err = regulator_mode_constrain(rdev, &mode);
-       if (err < 0) {
-               rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV\n",
-                        current_uA, input_uV, output_uV);
-               return err;
+               err = rdev->desc->ops->set_mode(rdev, mode);
+               if (err < 0)
+                       rdev_err(rdev, "failed to set optimum mode %x\n", mode);
        }
 
-       err = rdev->desc->ops->set_mode(rdev, mode);
-       if (err < 0)
-               rdev_err(rdev, "failed to set optimum mode %x\n", mode);
-
        return err;
 }
 

diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index d4ad5b5..8a0165f 100644 (file)
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -98,6 +98,7 @@ struct regulator_linear_range {
  *     REGULATOR_STATUS value (or negative errno)
  * @get_optimum_mode: Get the most efficient operating mode for the regulator
  *                    when running with the specified parameters.
+ * @set_load: Set the load for the regulator.
  *
  * @set_bypass: Set the regulator in bypass mode.
  * @get_bypass: Get the regulator bypass mode state.
@@ -167,6 +168,8 @@ struct regulator_ops {
        /* get most efficient regulator operating mode for load */
        unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
                                          int output_uV, int load_uA);
+       /* set the load on the regulator */
+       int (*set_load)(struct regulator_dev *, int load_uA);
 
        /* control and report on bypass mode */
        int (*set_bypass)(struct regulator_dev *dev, bool enable);