1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/regulator/fixed-helper.c b/drivers/regulator/fixed-helper.c
new file mode 100644
index 000000000000..cacd33c9d042
--- /dev/null
+++ b/drivers/regulator/fixed-helper.c
@@ -0,0 +1,52 @@
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/fixed.h>
+
+struct fixed_regulator_data {
+	struct fixed_voltage_config cfg;
+	struct regulator_init_data init_data;
+	struct platform_device pdev;
+};
+
+static void regulator_fixed_release(struct device *dev)
+{
+	struct fixed_regulator_data *data = container_of(dev,
+			struct fixed_regulator_data, pdev.dev);
+	kfree(data);
+}
+
+/**
+ * regulator_register_fixed - register a no-op fixed regulator
+ * @id: platform device id
+ * @supplies: consumers for this regulator
+ * @num_supplies: number of consumers
+ */
+struct platform_device *regulator_register_fixed(int id,
+		struct regulator_consumer_supply *supplies, int num_supplies)
+{
+	struct fixed_regulator_data *data;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return NULL;
+
+	data->cfg.supply_name = "fixed-dummy";
+	data->cfg.microvolts = 0;
+	data->cfg.gpio = -EINVAL;
+	data->cfg.enabled_at_boot = 1;
+	data->cfg.init_data = &data->init_data;
+
+	data->init_data.constraints.always_on = 1;
+	data->init_data.consumer_supplies = supplies;
+	data->init_data.num_consumer_supplies = num_supplies;
+
+	data->pdev.name = "reg-fixed-voltage";
+	data->pdev.id = id;
+	data->pdev.dev.platform_data = &data->cfg;
+	data->pdev.dev.release = regulator_fixed_release;
+
+	platform_device_register(&data->pdev);
+
+	return &data->pdev;
+}