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>

2 files changed, 32 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
  *
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index e2bac6db4abc..91aca11198d8 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -137,6 +137,8 @@ struct regulator *__must_check devm_regulator_get(struct device *dev,
                                              const char *id);
 struct regulator *__must_check regulator_get_exclusive(struct device *dev,
                                                        const char *id);
+struct regulator *__must_check devm_regulator_get_exclusive(struct device *dev,
+                                                        const char *id);
 struct regulator *__must_check regulator_get_optional(struct device *dev,
                                                       const char *id);
 struct regulator *__must_check devm_regulator_get_optional(struct device *dev,