regulator: core: Consolidate drms update handling

Refactor drms_uA_update() slightly to allow regulator_set_optimum_mode()
to utilize the same logic instead of duplicating it.

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 e225711bb8bc0009114d6ec0d95ab8d2bb2d68f3..0e0d8297dc8e607b8d70cea4f77300c4faec4a4f 100644 (file)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -658,23 +658,32 @@ static struct class regulator_class = {
 
 /* Calculate the new optimum regulator operating mode based on the new total
  * consumer load. All locks held by caller */
-static void drms_uA_update(struct regulator_dev *rdev)
+static int drms_uA_update(struct regulator_dev *rdev)
 {
        struct regulator *sibling;
        int current_uA = 0, output_uV, input_uV, err;
        unsigned int mode;
 
+       /*
+        * first check to see if we can set modes at all, otherwise just
+        * tell the consumer everything is OK.
+        */
        err = regulator_check_drms(rdev);
-       if (err < 0 || !rdev->desc->ops->get_optimum_mode ||
-           (!rdev->desc->ops->get_voltage &&
-            !rdev->desc->ops->get_voltage_sel) ||
-           !rdev->desc->ops->set_mode)
-               return;
+       if (err < 0)
+               return 0;
+
+       if (!rdev->desc->ops->get_optimum_mode)
+               return 0;
+
+       if (!rdev->desc->ops->set_mode)
+               return -EINVAL;
 
        /* get output voltage */
        output_uV = _regulator_get_voltage(rdev);
-       if (output_uV <= 0)
-               return;
+       if (output_uV <= 0) {
+               rdev_err(rdev, "invalid output voltage found\n");
+               return -EINVAL;
+       }
 
        /* get input voltage */
        input_uV = 0;
@@ -682,8 +691,10 @@ static void drms_uA_update(struct regulator_dev *rdev)
                input_uV = regulator_get_voltage(rdev->supply);
        if (input_uV <= 0)
                input_uV = rdev->constraints->input_uV;
-       if (input_uV <= 0)
-               return;
+       if (input_uV <= 0) {
+               rdev_err(rdev, "invalid input voltage found\n");
+               return -EINVAL;
+       }
 
        /* calc total requested load */
        list_for_each_entry(sibling, &rdev->consumer_list, list)
@@ -695,8 +706,17 @@ static void drms_uA_update(struct regulator_dev *rdev)
 
        /* check the new mode is allowed */
        err = regulator_mode_constrain(rdev, &mode);
-       if (err == 0)
-               rdev->desc->ops->set_mode(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);
+
+       return err;
 }
 
 static int suspend_set_state(struct regulator_dev *rdev,
@@ -3024,75 +3044,13 @@ EXPORT_SYMBOL_GPL(regulator_get_mode);
 int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
 {
        struct regulator_dev *rdev = regulator->rdev;
-       struct regulator *consumer;
-       int ret, output_uV, input_uV = 0, total_uA_load = 0;
-       unsigned int mode;
-
-       if (rdev->supply)
-               input_uV = regulator_get_voltage(rdev->supply);
+       int ret;
 
        mutex_lock(&rdev->mutex);
-
-       /*
-        * first check to see if we can set modes at all, otherwise just
-        * tell the consumer everything is OK.
-        */
        regulator->uA_load = uA_load;
-       ret = regulator_check_drms(rdev);
-       if (ret < 0) {
-               ret = 0;
-               goto out;
-       }
-
-       if (!rdev->desc->ops->get_optimum_mode)
-               goto out;
-
-       /*
-        * we can actually do this so any errors are indicators of
-        * potential real failure.
-        */
-       ret = -EINVAL;
-
-       if (!rdev->desc->ops->set_mode)
-               goto out;
-
-       /* get output voltage */
-       output_uV = _regulator_get_voltage(rdev);
-       if (output_uV <= 0) {
-               rdev_err(rdev, "invalid output voltage found\n");
-               goto out;
-       }
-
-       /* No supply? Use constraint voltage */
-       if (input_uV <= 0)
-               input_uV = rdev->constraints->input_uV;
-       if (input_uV <= 0) {
-               rdev_err(rdev, "invalid input voltage found\n");
-               goto out;
-       }
-
-       /* calc total requested load for this regulator */
-       list_for_each_entry(consumer, &rdev->consumer_list, list)
-               total_uA_load += consumer->uA_load;
-
-       mode = rdev->desc->ops->get_optimum_mode(rdev,
-                                                input_uV, output_uV,
-                                                total_uA_load);
-       ret = regulator_mode_constrain(rdev, &mode);
-       if (ret < 0) {
-               rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV\n",
-                        total_uA_load, input_uV, output_uV);
-               goto out;
-       }
-
-       ret = rdev->desc->ops->set_mode(rdev, mode);
-       if (ret < 0) {
-               rdev_err(rdev, "failed to set optimum mode %x\n", mode);
-               goto out;
-       }
-       ret = mode;
-out:
+       ret = drms_uA_update(rdev);
        mutex_unlock(&rdev->mutex);
+
        return ret;
 }
 EXPORT_SYMBOL_GPL(regulator_set_optimum_mode);