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>

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index eb750a1ed7fee76a3b4e5adbb67aa7d394cd9767..ca86f39a0fdc824fba463f0eb30157ce933bbe9c 100644 (file)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2490,6 +2490,43 @@ 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
  *

diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index 889ab5aaa85bdedc75802e5d15dd41f9d819325a..f2698a0edfc44486a95bd8379b1fa40dd56e1e70 100644 (file)
--- 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)
 {