1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
new file mode 100644
index 0000000000..7e649199bf
--- /dev/null
+++ b/drivers/regulator/fixed.c
@@ -0,0 +1,103 @@
+/*
+ * fixed regulator support
+ *
+ * Copyright (c) 2014 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <common.h>
+#include <malloc.h>
+#include <init.h>
+#include <regulator.h>
+#include <of.h>
+#include <of_gpio.h>
+#include <gpio.h>
+
+struct regulator_fixed {
+	int gpio;
+	int active_low;
+	struct regulator_dev rdev;
+};
+
+static int regulator_fixed_enable(struct regulator_dev *rdev)
+{
+	struct regulator_fixed *fix = container_of(rdev, struct regulator_fixed, rdev);
+
+	if (!gpio_is_valid(fix->gpio))
+		return 0;
+
+	return gpio_direction_output(fix->gpio, !fix->active_low);
+}
+
+static int regulator_fixed_disable(struct regulator_dev *rdev)
+{
+	struct regulator_fixed *fix = container_of(rdev, struct regulator_fixed, rdev);
+
+	if (!gpio_is_valid(fix->gpio))
+		return 0;
+
+	return gpio_direction_output(fix->gpio, fix->active_low);
+}
+
+static struct regulator_ops fixed_ops = {
+	.enable = regulator_fixed_enable,
+	.disable = regulator_fixed_disable,
+};
+
+static int regulator_fixed_probe(struct device_d *dev)
+{
+	struct regulator_fixed *fix;
+	enum of_gpio_flags gpioflags;
+	int ret;
+
+	if (!dev->device_node)
+		return -EINVAL;
+
+	fix = xzalloc(sizeof(*fix));
+
+	if (of_get_property(dev->device_node, "gpio", NULL)) {
+		fix->gpio = of_get_named_gpio_flags(dev->device_node, "gpio", 0, &gpioflags);
+		if (fix->gpio < 0) {
+			ret = fix->gpio;
+			goto err;
+		}
+
+		if (gpioflags & OF_GPIO_ACTIVE_LOW)
+			fix->active_low = 1;
+	}
+
+	fix->rdev.ops = &fixed_ops;
+
+	ret = of_regulator_register(&fix->rdev, dev->device_node);
+	if (ret)
+		return ret;
+
+	return 0;
+err:
+	free(fix);
+
+	return ret;
+}
+
+static struct of_device_id regulator_fixed_of_ids[] = {
+	{ .compatible = "regulator-fixed", },
+	{ }
+};
+
+static struct driver_d regulator_fixed_driver = {
+	.name  = "regulator-fixed",
+	.probe = regulator_fixed_probe,
+	.of_compatible = DRV_OF_COMPAT(regulator_fixed_of_ids),
+};
+coredevice_platform_driver(regulator_fixed_driver);