blob: 390f925cde61c1b309a3c228a473d04863016247 [file] [log] [blame]
/*
* Copyright 2019-2020 Peter Bigot Consulting, LLC
* Copyright 2022 Nordic Semiconductor ASA
* Copyright 2023 EPAM Systems
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT regulator_fixed
#include <stdint.h>
#include <zephyr/kernel.h>
#include <zephyr/drivers/regulator.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(regulator_fixed, CONFIG_REGULATOR_LOG_LEVEL);
struct regulator_fixed_config {
struct regulator_common_config common;
uint32_t startup_delay_us;
uint32_t off_on_delay_us;
struct gpio_dt_spec enable;
};
struct regulator_fixed_data {
struct regulator_common_data common;
};
static int regulator_fixed_enable(const struct device *dev)
{
const struct regulator_fixed_config *cfg = dev->config;
int ret;
if (!cfg->enable.port) {
return -ENOTSUP;
}
ret = gpio_pin_set_dt(&cfg->enable, 1);
if (ret < 0) {
return ret;
}
if (cfg->off_on_delay_us > 0U) {
k_sleep(K_USEC(cfg->off_on_delay_us));
}
return 0;
}
static int regulator_fixed_disable(const struct device *dev)
{
const struct regulator_fixed_config *cfg = dev->config;
if (!cfg->enable.port) {
return -ENOTSUP;
}
return gpio_pin_set_dt(&cfg->enable, 0);
}
static unsigned int regulator_fixed_count_voltages(const struct device *dev)
{
int32_t min_uv;
return (regulator_common_get_min_voltage(dev, &min_uv) < 0) ? 0U : 1U;
}
static int regulator_fixed_list_voltage(const struct device *dev,
unsigned int idx,
int32_t *volt_uv)
{
if (idx != 0) {
return -EINVAL;
}
if (regulator_common_get_min_voltage(dev, volt_uv) < 0) {
return -EINVAL;
}
return 0;
}
static const struct regulator_driver_api regulator_fixed_api = {
.enable = regulator_fixed_enable,
.disable = regulator_fixed_disable,
.count_voltages = regulator_fixed_count_voltages,
.list_voltage = regulator_fixed_list_voltage,
};
static int regulator_fixed_init(const struct device *dev)
{
const struct regulator_fixed_config *cfg = dev->config;
bool init_enabled;
int ret;
regulator_common_data_init(dev);
init_enabled = regulator_common_is_init_enabled(dev);
if (cfg->enable.port != NULL) {
if (!gpio_is_ready_dt(&cfg->enable)) {
LOG_ERR("GPIO port: %s not ready", cfg->enable.port->name);
return -ENODEV;
}
if (init_enabled) {
ret = gpio_pin_configure_dt(&cfg->enable, GPIO_OUTPUT_ACTIVE);
if (ret < 0) {
return ret;
}
k_busy_wait(cfg->startup_delay_us);
} else {
ret = gpio_pin_configure_dt(&cfg->enable, GPIO_OUTPUT_INACTIVE);
if (ret < 0) {
return ret;
}
}
}
return regulator_common_init(dev, init_enabled);
}
#define REGULATOR_FIXED_DEFINE(inst) \
BUILD_ASSERT(DT_INST_PROP_OR(inst, regulator_min_microvolt, 0) == \
DT_INST_PROP_OR(inst, regulator_max_microvolt, 0), \
"Regulator requires fixed voltages"); \
static struct regulator_fixed_data data##inst; \
\
static const struct regulator_fixed_config config##inst = { \
.common = REGULATOR_DT_INST_COMMON_CONFIG_INIT(inst), \
.startup_delay_us = DT_INST_PROP(inst, startup_delay_us), \
.off_on_delay_us = DT_INST_PROP(inst, off_on_delay_us), \
.enable = GPIO_DT_SPEC_INST_GET_OR(inst, enable_gpios, {0}), \
}; \
\
DEVICE_DT_INST_DEFINE(inst, regulator_fixed_init, NULL, &data##inst, \
&config##inst, POST_KERNEL, \
CONFIG_REGULATOR_FIXED_INIT_PRIORITY, \
&regulator_fixed_api);
DT_INST_FOREACH_STATUS_OKAY(REGULATOR_FIXED_DEFINE)