Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / regulator / fixed-helper.c

diff --git a/kernel/drivers/regulator/fixed-helper.c b/kernel/drivers/regulator/fixed-helper.c
new file mode 100644 (file)
index 0000000..f9d0279
--- /dev/null
+++ b/kernel/drivers/regulator/fixed-helper.c
@@ -0,0 +1,61 @@
+#include <linux/slab.h>
+#include <linux/string.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->cfg.supply_name);
+       kfree(data);
+}
+
+/**
+ * regulator_register_fixed_name - register a no-op fixed regulator
+ * @id: platform device id
+ * @name: name to be used for the regulator
+ * @supplies: consumers for this regulator
+ * @num_supplies: number of consumers
+ * @uv: voltage in microvolts
+ */
+struct platform_device *regulator_register_always_on(int id, const char *name,
+       struct regulator_consumer_supply *supplies, int num_supplies, int uv)
+{
+       struct fixed_regulator_data *data;
+
+       data = kzalloc(sizeof(*data), GFP_KERNEL);
+       if (!data)
+               return NULL;
+
+       data->cfg.supply_name = kstrdup(name, GFP_KERNEL);
+       if (!data->cfg.supply_name) {
+               kfree(data);
+               return NULL;
+       }
+
+       data->cfg.microvolts = uv;
+       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;
+}