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;
32 dev_pdata = dev_get_platdata(dev);
33 uc_pdata = dev_get_uclass_platdata(dev);
37 /* Set type to fixed */
38 uc_pdata->type = REGULATOR_TYPE_FIXED;
40 /* Get fixed regulator optional enable GPIO desc */
41 gpio = &dev_pdata->gpio;
42 ret = gpio_request_by_name(dev, "gpio", 0, gpio, GPIOD_IS_OUT);
44 debug("Fixed regulator optional enable GPIO - not found! Error: %d\n",
50 /* Get optional ramp up delay */
51 dev_pdata->startup_delay_us = fdtdec_get_uint(gd->fdt_blob,
53 "startup-delay-us", 0);
58 static int fixed_regulator_get_value(struct udevice *dev)
60 struct dm_regulator_uclass_platdata *uc_pdata;
62 uc_pdata = dev_get_uclass_platdata(dev);
66 if (uc_pdata->min_uV != uc_pdata->max_uV) {
67 debug("Invalid constraints for: %s\n", uc_pdata->name);
71 return uc_pdata->min_uV;
74 static int fixed_regulator_get_current(struct udevice *dev)
76 struct dm_regulator_uclass_platdata *uc_pdata;
78 uc_pdata = dev_get_uclass_platdata(dev);
82 if (uc_pdata->min_uA != uc_pdata->max_uA) {
83 debug("Invalid constraints for: %s\n", uc_pdata->name);
87 return uc_pdata->min_uA;
90 static bool fixed_regulator_get_enable(struct udevice *dev)
92 struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
94 /* Enable GPIO is optional */
95 if (!dev_pdata->gpio.dev)
98 return dm_gpio_get_value(&dev_pdata->gpio);
101 static int fixed_regulator_set_enable(struct udevice *dev, bool enable)
103 struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
106 /* Enable GPIO is optional */
107 if (!dev_pdata->gpio.dev) {
113 ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
115 error("Can't set regulator : %s gpio to: %d\n", dev->name,
120 if (enable && dev_pdata->startup_delay_us)
121 udelay(dev_pdata->startup_delay_us);
126 static const struct dm_regulator_ops fixed_regulator_ops = {
127 .get_value = fixed_regulator_get_value,
128 .get_current = fixed_regulator_get_current,
129 .get_enable = fixed_regulator_get_enable,
130 .set_enable = fixed_regulator_set_enable,
133 static const struct udevice_id fixed_regulator_ids[] = {
134 { .compatible = "regulator-fixed" },
138 U_BOOT_DRIVER(fixed_regulator) = {
139 .name = "fixed regulator",
140 .id = UCLASS_REGULATOR,
141 .ops = &fixed_regulator_ops,
142 .of_match = fixed_regulator_ids,
143 .ofdata_to_platdata = fixed_regulator_ofdata_to_platdata,
144 .platdata_auto_alloc_size = sizeof(struct fixed_regulator_platdata),