2 * Copyright (C) 2015 Samsung Electronics
4 * Przemyslaw Marczak <p.marczak@samsung.com>
6 * SPDX-License-Identifier: GPL-2.0+
15 #include <power/pmic.h>
16 #include <power/regulator.h>
18 DECLARE_GLOBAL_DATA_PTR;
20 struct fixed_regulator_platdata {
21 struct gpio_desc gpio; /* GPIO for regulator enable control */
24 static int fixed_regulator_ofdata_to_platdata(struct udevice *dev)
26 struct dm_regulator_uclass_platdata *uc_pdata;
27 struct fixed_regulator_platdata *dev_pdata;
28 struct gpio_desc *gpio;
31 dev_pdata = dev_get_platdata(dev);
32 uc_pdata = dev_get_uclass_platdata(dev);
36 /* Set type to fixed */
37 uc_pdata->type = REGULATOR_TYPE_FIXED;
39 /* Get fixed regulator gpio desc */
40 gpio = &dev_pdata->gpio;
41 ret = gpio_request_by_name(dev, "gpio", 0, gpio, GPIOD_IS_OUT);
43 debug("Fixed regulator gpio - not found! Error: %d", ret);
48 static int fixed_regulator_get_value(struct udevice *dev)
50 struct dm_regulator_uclass_platdata *uc_pdata;
52 uc_pdata = dev_get_uclass_platdata(dev);
56 if (uc_pdata->min_uV != uc_pdata->max_uV) {
57 debug("Invalid constraints for: %s\n", uc_pdata->name);
61 return uc_pdata->min_uV;
64 static int fixed_regulator_get_current(struct udevice *dev)
66 struct dm_regulator_uclass_platdata *uc_pdata;
68 uc_pdata = dev_get_uclass_platdata(dev);
72 if (uc_pdata->min_uA != uc_pdata->max_uA) {
73 debug("Invalid constraints for: %s\n", uc_pdata->name);
77 return uc_pdata->min_uA;
80 static bool fixed_regulator_get_enable(struct udevice *dev)
82 struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
84 if (!dev_pdata->gpio.dev)
87 return dm_gpio_get_value(&dev_pdata->gpio);
90 static int fixed_regulator_set_enable(struct udevice *dev, bool enable)
92 struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
95 if (!dev_pdata->gpio.dev)
98 ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
100 error("Can't set regulator : %s gpio to: %d\n", dev->name,
107 static const struct dm_regulator_ops fixed_regulator_ops = {
108 .get_value = fixed_regulator_get_value,
109 .get_current = fixed_regulator_get_current,
110 .get_enable = fixed_regulator_get_enable,
111 .set_enable = fixed_regulator_set_enable,
114 static const struct udevice_id fixed_regulator_ids[] = {
115 { .compatible = "regulator-fixed" },
119 U_BOOT_DRIVER(fixed_regulator) = {
120 .name = "fixed regulator",
121 .id = UCLASS_REGULATOR,
122 .ops = &fixed_regulator_ops,
123 .of_match = fixed_regulator_ids,
124 .ofdata_to_platdata = fixed_regulator_ofdata_to_platdata,
125 .platdata_auto_alloc_size = sizeof(struct fixed_regulator_platdata),