regulator: add regulator_bulk_force_disable function

This patch allows consumers to forcibly disable multiple regulator
clients in a single API call.

Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 45 insertions, 0 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index eb750a1ed7fe..ca86f39a0fdc 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2491,6 +2491,43 @@ err:
 EXPORT_SYMBOL_GPL(regulator_bulk_disable);
 
 /**
+ * regulator_bulk_force_disable - force disable multiple regulator consumers
+ *
+ * @num_consumers: Number of consumers
+ * @consumers:     Consumer data; clients are stored here.
+ * @return         0 on success, an errno on failure
+ *
+ * This convenience API allows consumers to forcibly disable multiple regulator
+ * clients in a single API call.
+ * NOTE: This should be used for situations when device damage will
+ * likely occur if the regulators are not disabled (e.g. over temp).
+ * Although regulator_force_disable function call for some consumers can
+ * return error numbers, the function is called for all consumers.
+ */
+int regulator_bulk_force_disable(int num_consumers,
+			   struct regulator_bulk_data *consumers)
+{
+	int i;
+	int ret;
+
+	for (i = 0; i < num_consumers; i++)
+		consumers[i].ret =
+			    regulator_force_disable(consumers[i].consumer);
+
+	for (i = 0; i < num_consumers; i++) {
+		if (consumers[i].ret != 0) {
+			ret = consumers[i].ret;
+			goto out;
+		}
+	}
+
+	return 0;
+out:
+	return ret;
+}
+EXPORT_SYMBOL_GPL(regulator_bulk_force_disable);
+
+/**
  * regulator_bulk_free - free multiple regulator consumers
  *
  * @num_consumers: Number of consumers
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index 889ab5aaa85b..f2698a0edfc4 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -149,6 +149,8 @@ int regulator_bulk_enable(int num_consumers,
 			  struct regulator_bulk_data *consumers);
 int regulator_bulk_disable(int num_consumers,
 			   struct regulator_bulk_data *consumers);
+int regulator_bulk_force_disable(int num_consumers,
+			   struct regulator_bulk_data *consumers);
 void regulator_bulk_free(int num_consumers,
 			 struct regulator_bulk_data *consumers);
 
@@ -247,6 +249,12 @@ static inline int regulator_bulk_disable(int num_consumers,
 	return 0;
 }
 
+static inline int regulator_bulk_force_disable(int num_consumers,
+					struct regulator_bulk_data *consumers)
+{
+	return 0;
+}
+
 static inline void regulator_bulk_free(int num_consumers,
 				       struct regulator_bulk_data *consumers)
 {