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;
23 /* Get optional enable GPIO desc */
24 gpio = &dev_pdata->gpio;
25 ret = gpio_request_by_name(dev, enable_gpio_name, 0, gpio, flags);
27 debug("Regulator '%s' optional enable GPIO - not found! Error: %d\n",
33 /* Get optional ramp up delay */
34 dev_pdata->startup_delay_us = dev_read_u32_default(dev,
35 "startup-delay-us", 0);
36 dev_pdata->off_on_delay_us =
37 dev_read_u32_default(dev, "off-on-delay-us", 0);
38 if (!dev_pdata->off_on_delay_us) {
39 dev_pdata->off_on_delay_us =
40 dev_read_u32_default(dev, "u-boot,off-on-delay-us", 0);
46 int regulator_common_get_enable(const struct udevice *dev,
47 struct regulator_common_platdata *dev_pdata)
49 /* Enable GPIO is optional */
50 if (!dev_pdata->gpio.dev)
53 return dm_gpio_get_value(&dev_pdata->gpio);
56 int regulator_common_set_enable(const struct udevice *dev,
57 struct regulator_common_platdata *dev_pdata, bool enable)
61 debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
62 dev->name, enable, dev_pdata->startup_delay_us,
63 dm_gpio_is_valid(&dev_pdata->gpio));
64 /* Enable GPIO is optional */
65 if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
71 ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
73 pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
78 if (enable && dev_pdata->startup_delay_us)
79 udelay(dev_pdata->startup_delay_us);
80 debug("%s: done\n", __func__);
82 if (!enable && dev_pdata->off_on_delay_us)
83 udelay(dev_pdata->off_on_delay_us);