regulator: helpers: Add regmap set_pull_down helper

Add a helper function regulator_set_pull_down_regmap to allow regmap
based regulators to easily enable pull down.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index a75e7da49af8a6fb91ce0d7027598411e36c043c..2ae7c3ac5940ec29b52870f4619905e7040aaf20 100644 (file)
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -463,6 +463,24 @@ int regulator_set_soft_start_regmap(struct regulator_dev *rdev)
 }
 EXPORT_SYMBOL_GPL(regulator_set_soft_start_regmap);
 
+/**
+ * regulator_set_pull_down_regmap - Default set_pull_down() using regmap
+ *
+ * @rdev: device to operate on.
+ */
+int regulator_set_pull_down_regmap(struct regulator_dev *rdev)
+{
+       unsigned int val;
+
+       val = rdev->desc->pull_down_val_on;
+       if (!val)
+               val = rdev->desc->pull_down_mask;
+
+       return regmap_update_bits(rdev->regmap, rdev->desc->pull_down_reg,
+                                 rdev->desc->pull_down_mask, val);
+}
+EXPORT_SYMBOL_GPL(regulator_set_pull_down_regmap);
+
 /**
  * regulator_get_bypass_regmap - Default get_bypass() using regmap
  *

diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 1054c033e783ac4de92e83b62d99ee8fdb4c4d9a..8a9078dd2a5f16a82b7c96e03fc264370ea847d7 100644 (file)
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -296,6 +296,10 @@ enum regulator_type {
  * @soft_start_mask: Mask for control when using regmap set_soft_start
  * @soft_start_val_on: Enabling value for control when using regmap
  *                     set_soft_start
+ * @pull_down_reg: Register for control when using regmap set_pull_down
+ * @pull_down_mask: Mask for control when using regmap set_pull_down
+ * @pull_down_val_on: Enabling value for control when using regmap
+ *                     set_pull_down
  *
  * @enable_time: Time taken for initial enable of regulator (in uS).
  * @off_on_delay: guard time (in uS), before re-enabling a regulator
@@ -352,6 +356,9 @@ struct regulator_desc {
        unsigned int soft_start_reg;
        unsigned int soft_start_mask;
        unsigned int soft_start_val_on;
+       unsigned int pull_down_reg;
+       unsigned int pull_down_mask;
+       unsigned int pull_down_val_on;
 
        unsigned int enable_time;
 
@@ -484,6 +491,7 @@ int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
 int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable);
 int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable);
 int regulator_set_soft_start_regmap(struct regulator_dev *rdev);
+int regulator_set_pull_down_regmap(struct regulator_dev *rdev);
 
 int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
                                          bool enable);