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Diffstat (limited to 'kernel/drivers/regulator/fixed-helper.c')
-rw-r--r--kernel/drivers/regulator/fixed-helper.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/kernel/drivers/regulator/fixed-helper.c b/kernel/drivers/regulator/fixed-helper.c
new file mode 100644
index 000000000..f9d027992
--- /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;
+}