regulator: provide regulator_bulk_set_supply_names()

There are many regulator consumers who - before using the regulator
bulk functions - set the supply names in regulator_bulk_data using
a for loop.

Let's provide a simple helper in the consumer API that allows users
to do the same with a single function call.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20190830071740.4267-2-brgl@bgdev.pl
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index 4986cc5064a1fbed266ada36b54303814d628693..ca3dc3f3bb292c679e8521d12b082b5e82447349 100644 (file)
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -860,3 +860,24 @@ int regulator_get_current_limit_regmap(struct regulator_dev *rdev)
        return -EINVAL;
 }
 EXPORT_SYMBOL_GPL(regulator_get_current_limit_regmap);
+
+/**
+ * regulator_bulk_set_supply_names - initialize the 'supply' fields in an array
+ *                                   of regulator_bulk_data structs
+ *
+ * @consumers: array of regulator_bulk_data entries to initialize
+ * @supply_names: array of supply name strings
+ * @num_supplies: number of supply names to initialize
+ *
+ * Note: the 'consumers' array must be the size of 'num_supplies'.
+ */
+void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
+                                    const char *const *supply_names,
+                                    unsigned int num_supplies)
+{
+       unsigned int i;
+
+       for (i = 0; i < num_supplies; i++)
+               consumers[i].supply = supply_names[i];
+}
+EXPORT_SYMBOL_GPL(regulator_bulk_set_supply_names);

diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index 815983419375a28fb5db6d87843d7acc2d193501..6d2181a7698741052e928721d371e2fd61c49530 100644 (file)
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -281,6 +281,12 @@ void devm_regulator_unregister_notifier(struct regulator *regulator,
 void *regulator_get_drvdata(struct regulator *regulator);
 void regulator_set_drvdata(struct regulator *regulator, void *data);
 
+/* misc helpers */
+
+void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
+                                    const char *const *supply_names,
+                                    unsigned int num_supplies);
+
 #else
 
 /*
@@ -580,6 +586,12 @@ static inline int regulator_list_voltage(struct regulator *regulator, unsigned s
        return -EINVAL;
 }
 
+void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
+                                    const char *const *supply_names,
+                                    unsigned int num_supplies)
+{
+}
+
 #endif
 
 static inline int regulator_set_voltage_triplet(struct regulator *regulator,