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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2019 Disruptive Technologies Research AS
- * Sven Schwermer <sven.svenschwermer@disruptive-technologies.com>
- */
- #include <common.h>
- #include <dm.h>
- #include <log.h>
- #include <linux/delay.h>
- #include <power/regulator.h>
- #include "regulator_common.h"
- int regulator_common_of_to_plat(struct udevice *dev,
- struct regulator_common_plat *dev_pdata,
- const char *enable_gpio_name)
- {
- struct gpio_desc *gpio;
- int flags = GPIOD_IS_OUT;
- int ret;
- if (!dev_read_bool(dev, "enable-active-high"))
- flags |= GPIOD_ACTIVE_LOW;
- if (dev_read_bool(dev, "regulator-boot-on"))
- flags |= GPIOD_IS_OUT_ACTIVE;
- /* Get optional enable GPIO desc */
- gpio = &dev_pdata->gpio;
- ret = gpio_request_by_name(dev, enable_gpio_name, 0, gpio, flags);
- if (ret) {
- debug("Regulator '%s' optional enable GPIO - not found! Error: %d\n",
- dev->name, ret);
- if (ret != -ENOENT)
- return ret;
- }
- /* Get optional ramp up delay */
- dev_pdata->startup_delay_us = dev_read_u32_default(dev,
- "startup-delay-us", 0);
- dev_pdata->off_on_delay_us =
- dev_read_u32_default(dev, "off-on-delay-us", 0);
- if (!dev_pdata->off_on_delay_us) {
- dev_pdata->off_on_delay_us =
- dev_read_u32_default(dev, "u-boot,off-on-delay-us", 0);
- }
- return 0;
- }
- int regulator_common_get_enable(const struct udevice *dev,
- struct regulator_common_plat *dev_pdata)
- {
- /* Enable GPIO is optional */
- if (!dev_pdata->gpio.dev)
- return true;
- return dm_gpio_get_value(&dev_pdata->gpio);
- }
- int regulator_common_set_enable(const struct udevice *dev,
- struct regulator_common_plat *dev_pdata, bool enable)
- {
- int ret;
- debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
- dev->name, enable, dev_pdata->startup_delay_us,
- dm_gpio_is_valid(&dev_pdata->gpio));
- /* Enable GPIO is optional */
- if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
- if (!enable)
- return -ENOSYS;
- return 0;
- }
- ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
- if (ret) {
- pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
- enable);
- return ret;
- }
- if (enable && dev_pdata->startup_delay_us)
- udelay(dev_pdata->startup_delay_us);
- debug("%s: done\n", __func__);
- if (!enable && dev_pdata->off_on_delay_us)
- udelay(dev_pdata->off_on_delay_us);
- return 0;
- }
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