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 */
22 unsigned int startup_delay_us;
25 static int fixed_regulator_ofdata_to_platdata(struct udevice *dev)
27 struct dm_regulator_uclass_platdata *uc_pdata;
28 struct fixed_regulator_platdata *dev_pdata;
29 struct gpio_desc *gpio;
30 const void *blob = gd->fdt_blob;
31 int node = dev_of_offset(dev), flags = GPIOD_IS_OUT;
34 dev_pdata = dev_get_platdata(dev);
35 uc_pdata = dev_get_uclass_platdata(dev);
39 /* Set type to fixed */
40 uc_pdata->type = REGULATOR_TYPE_FIXED;
42 if (fdtdec_get_bool(blob, node, "enable-active-high"))
43 flags |= GPIOD_IS_OUT_ACTIVE;
45 /* Get fixed regulator optional enable GPIO desc */
46 gpio = &dev_pdata->gpio;
47 ret = gpio_request_by_name(dev, "gpio", 0, gpio, flags);
49 debug("Fixed regulator optional enable GPIO - not found! Error: %d\n",
55 /* Get optional ramp up delay */
56 dev_pdata->startup_delay_us = fdtdec_get_uint(gd->fdt_blob,
58 "startup-delay-us", 0);
63 static int fixed_regulator_get_value(struct udevice *dev)
65 struct dm_regulator_uclass_platdata *uc_pdata;
67 uc_pdata = dev_get_uclass_platdata(dev);
71 if (uc_pdata->min_uV != uc_pdata->max_uV) {
72 debug("Invalid constraints for: %s\n", uc_pdata->name);
76 return uc_pdata->min_uV;
79 static int fixed_regulator_get_current(struct udevice *dev)
81 struct dm_regulator_uclass_platdata *uc_pdata;
83 uc_pdata = dev_get_uclass_platdata(dev);
87 if (uc_pdata->min_uA != uc_pdata->max_uA) {
88 debug("Invalid constraints for: %s\n", uc_pdata->name);
92 return uc_pdata->min_uA;
95 static bool fixed_regulator_get_enable(struct udevice *dev)
97 struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
99 /* Enable GPIO is optional */
100 if (!dev_pdata->gpio.dev)
103 return dm_gpio_get_value(&dev_pdata->gpio);
106 static int fixed_regulator_set_enable(struct udevice *dev, bool enable)
108 struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
111 /* Enable GPIO is optional */
112 if (!dev_pdata->gpio.dev) {
118 ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
120 error("Can't set regulator : %s gpio to: %d\n", dev->name,
125 if (enable && dev_pdata->startup_delay_us)
126 udelay(dev_pdata->startup_delay_us);
131 static const struct dm_regulator_ops fixed_regulator_ops = {
132 .get_value = fixed_regulator_get_value,
133 .get_current = fixed_regulator_get_current,
134 .get_enable = fixed_regulator_get_enable,
135 .set_enable = fixed_regulator_set_enable,
138 static const struct udevice_id fixed_regulator_ids[] = {
139 { .compatible = "regulator-fixed" },
143 U_BOOT_DRIVER(fixed_regulator) = {
144 .name = "fixed regulator",
145 .id = UCLASS_REGULATOR,
146 .ops = &fixed_regulator_ops,
147 .of_match = fixed_regulator_ids,
148 .ofdata_to_platdata = fixed_regulator_ofdata_to_platdata,
149 .platdata_auto_alloc_size = sizeof(struct fixed_regulator_platdata),