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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_platdata *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_platdata *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_platdata *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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