1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2019 Disruptive Technologies Research AS
4 * Sven Schwermer <sven.svenschwermer@disruptive-technologies.com>
7 #include "regulator_common.h"
10 #include <linux/delay.h>
11 #include <power/regulator.h>
13 int regulator_common_ofdata_to_platdata(struct udevice *dev,
14 struct regulator_common_platdata *dev_pdata, const char *enable_gpio_name)
16 struct gpio_desc *gpio;
17 int flags = GPIOD_IS_OUT;
20 if (!dev_read_bool(dev, "enable-active-high"))
21 flags |= GPIOD_ACTIVE_LOW;
22 if (dev_read_bool(dev, "regulator-boot-on"))
23 flags |= GPIOD_IS_OUT_ACTIVE;
25 /* Get optional enable GPIO desc */
26 gpio = &dev_pdata->gpio;
27 ret = gpio_request_by_name(dev, enable_gpio_name, 0, gpio, flags);
29 debug("Regulator '%s' optional enable GPIO - not found! Error: %d\n",
35 /* Get optional ramp up delay */
36 dev_pdata->startup_delay_us = dev_read_u32_default(dev,
37 "startup-delay-us", 0);
38 dev_pdata->off_on_delay_us =
39 dev_read_u32_default(dev, "off-on-delay-us", 0);
40 if (!dev_pdata->off_on_delay_us) {
41 dev_pdata->off_on_delay_us =
42 dev_read_u32_default(dev, "u-boot,off-on-delay-us", 0);
48 int regulator_common_get_enable(const struct udevice *dev,
49 struct regulator_common_platdata *dev_pdata)
51 /* Enable GPIO is optional */
52 if (!dev_pdata->gpio.dev)
55 return dm_gpio_get_value(&dev_pdata->gpio);
58 int regulator_common_set_enable(const struct udevice *dev,
59 struct regulator_common_platdata *dev_pdata, bool enable)
63 debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
64 dev->name, enable, dev_pdata->startup_delay_us,
65 dm_gpio_is_valid(&dev_pdata->gpio));
66 /* Enable GPIO is optional */
67 if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
73 ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
75 pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
80 if (enable && dev_pdata->startup_delay_us)
81 udelay(dev_pdata->startup_delay_us);
82 debug("%s: done\n", __func__);
84 if (!enable && dev_pdata->off_on_delay_us)
85 udelay(dev_pdata->off_on_delay_us);