regulator: Add devm_regulator_get_exclusive()

Add a resource managed regulator_get_exclusive()

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index a27a5b6267dd..4b9039b43b6c 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1494,6 +1494,36 @@ static void _regulator_put(struct regulator *regulator)
 }
 
 /**
+ * devm_regulator_get_exclusive - Resource managed regulator_get_exclusive()
+ * @dev: device for regulator "consumer"
+ * @id: Supply name or regulator ID.
+ *
+ * Managed regulator_get_exclusive(). Regulators returned from this function
+ * are automatically regulator_put() on driver detach. See regulator_get() for
+ * more information.
+ */
+struct regulator *devm_regulator_get_exclusive(struct device *dev,
+					       const char *id)
+{
+	struct regulator **ptr, *regulator;
+
+	ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return ERR_PTR(-ENOMEM);
+
+	regulator = _regulator_get(dev, id, 1);
+	if (!IS_ERR(regulator)) {
+		*ptr = regulator;
+		devres_add(dev, ptr);
+	} else {
+		devres_free(ptr);
+	}
+
+	return regulator;
+}
+EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive);
+
+/**
  * regulator_put - "free" the regulator source
  * @regulator: regulator source
  *