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>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index a75e7da49af8..2ae7c3ac5940 100644
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -464,6 +464,24 @@ 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
  *
  * @rdev: device to operate on.