| /* |
| * Copyright (c) 2023 Nordic Semiconductor ASA |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT nordic_npm1300 |
| |
| #include <errno.h> |
| |
| #include <zephyr/drivers/i2c.h> |
| #include <zephyr/sys/util.h> |
| #include <zephyr/sys/byteorder.h> |
| #include <zephyr/drivers/gpio.h> |
| #include <zephyr/drivers/gpio/gpio_utils.h> |
| #include <zephyr/drivers/mfd/npm1300.h> |
| |
| #define TIME_BASE 0x07U |
| #define MAIN_BASE 0x00U |
| #define SHIP_BASE 0x0BU |
| #define GPIO_BASE 0x06U |
| |
| #define TIME_OFFSET_LOAD 0x03U |
| #define TIME_OFFSET_TIMER 0x08U |
| |
| #define MAIN_OFFSET_RESET 0x01U |
| #define MAIN_OFFSET_SET 0x00U |
| #define MAIN_OFFSET_CLR 0x01U |
| #define MAIN_OFFSET_INTENSET 0x02U |
| #define MAIN_OFFSET_INTENCLR 0x03U |
| |
| #define SHIP_OFFSET_HIBERNATE 0x00U |
| #define SHIP_OFFSET_CFGSTROBE 0x01U |
| #define SHIP_OFFSET_CONFIG 0x04U |
| #define SHIP_OFFSET_LPCONFIG 0x06U |
| |
| #define GPIO_OFFSET_MODE 0x00U |
| |
| #define TIMER_PRESCALER_MS 16U |
| #define TIMER_MAX 0xFFFFFFU |
| |
| #define MAIN_SIZE 0x26U |
| |
| #define GPIO_MODE_GPOIRQ 5 |
| |
| struct mfd_npm1300_config { |
| struct i2c_dt_spec i2c; |
| struct gpio_dt_spec host_int_gpios; |
| uint8_t pmic_int_pin; |
| uint8_t active_time; |
| uint8_t lp_reset; |
| }; |
| |
| struct mfd_npm1300_data { |
| struct k_mutex mutex; |
| const struct device *dev; |
| struct gpio_callback gpio_cb; |
| struct k_work work; |
| sys_slist_t callbacks; |
| }; |
| |
| struct event_reg_t { |
| uint8_t offset; |
| uint8_t mask; |
| }; |
| |
| static const struct event_reg_t event_reg[NPM1300_EVENT_MAX] = { |
| [NPM1300_EVENT_CHG_COMPLETED] = {0x0AU, 0x10U}, |
| [NPM1300_EVENT_CHG_ERROR] = {0x0AU, 0x20U}, |
| [NPM1300_EVENT_BATTERY_DETECTED] = {0x0EU, 0x01U}, |
| [NPM1300_EVENT_BATTERY_REMOVED] = {0x0EU, 0x02U}, |
| [NPM1300_EVENT_SHIPHOLD_PRESS] = {0x12U, 0x01U}, |
| [NPM1300_EVENT_SHIPHOLD_RELEASE] = {0x12U, 0x02U}, |
| [NPM1300_EVENT_WATCHDOG_WARN] = {0x12U, 0x08U}, |
| [NPM1300_EVENT_VBUS_DETECTED] = {0x16U, 0x01U}, |
| [NPM1300_EVENT_VBUS_REMOVED] = {0x16U, 0x02U}, |
| [NPM1300_EVENT_GPIO0_EDGE] = {0x22U, 0x01U}, |
| [NPM1300_EVENT_GPIO1_EDGE] = {0x22U, 0x02U}, |
| [NPM1300_EVENT_GPIO2_EDGE] = {0x22U, 0x04U}, |
| [NPM1300_EVENT_GPIO3_EDGE] = {0x22U, 0x08U}, |
| [NPM1300_EVENT_GPIO4_EDGE] = {0x22U, 0x10U}, |
| }; |
| |
| static void gpio_callback(const struct device *dev, struct gpio_callback *cb, uint32_t pins) |
| { |
| struct mfd_npm1300_data *data = CONTAINER_OF(cb, struct mfd_npm1300_data, gpio_cb); |
| |
| k_work_submit(&data->work); |
| } |
| |
| static void work_callback(struct k_work *work) |
| { |
| struct mfd_npm1300_data *data = CONTAINER_OF(work, struct mfd_npm1300_data, work); |
| const struct mfd_npm1300_config *config = data->dev->config; |
| uint8_t buf[MAIN_SIZE]; |
| int ret; |
| |
| /* Read all MAIN registers into temporary buffer */ |
| ret = mfd_npm1300_reg_read_burst(data->dev, MAIN_BASE, 0U, buf, sizeof(buf)); |
| if (ret < 0) { |
| k_work_submit(&data->work); |
| return; |
| } |
| |
| for (int i = 0; i < NPM1300_EVENT_MAX; i++) { |
| int offset = event_reg[i].offset + MAIN_OFFSET_CLR; |
| |
| if ((buf[offset] & event_reg[i].mask) != 0U) { |
| gpio_fire_callbacks(&data->callbacks, data->dev, BIT(i)); |
| |
| ret = mfd_npm1300_reg_write(data->dev, MAIN_BASE, offset, |
| event_reg[i].mask); |
| if (ret < 0) { |
| k_work_submit(&data->work); |
| return; |
| } |
| } |
| } |
| |
| /* Resubmit handler to queue if interrupt is still active */ |
| if (gpio_pin_get_dt(&config->host_int_gpios) != 0) { |
| k_work_submit(&data->work); |
| } |
| } |
| |
| static int mfd_npm1300_init(const struct device *dev) |
| { |
| const struct mfd_npm1300_config *config = dev->config; |
| struct mfd_npm1300_data *mfd_data = dev->data; |
| int ret; |
| |
| if (!i2c_is_ready_dt(&config->i2c)) { |
| return -ENODEV; |
| } |
| |
| k_mutex_init(&mfd_data->mutex); |
| |
| mfd_data->dev = dev; |
| |
| if (config->host_int_gpios.port != NULL) { |
| /* Set specified PMIC pin to be interrupt output */ |
| ret = mfd_npm1300_reg_write(dev, GPIO_BASE, GPIO_OFFSET_MODE + config->pmic_int_pin, |
| GPIO_MODE_GPOIRQ); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| /* Configure host interrupt GPIO */ |
| if (!gpio_is_ready_dt(&config->host_int_gpios)) { |
| return -ENODEV; |
| } |
| |
| ret = gpio_pin_configure_dt(&config->host_int_gpios, GPIO_INPUT); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| gpio_init_callback(&mfd_data->gpio_cb, gpio_callback, |
| BIT(config->host_int_gpios.pin)); |
| |
| ret = gpio_add_callback(config->host_int_gpios.port, &mfd_data->gpio_cb); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| mfd_data->work.handler = work_callback; |
| |
| ret = gpio_pin_interrupt_configure_dt(&config->host_int_gpios, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| ret = mfd_npm1300_reg_write(dev, SHIP_BASE, SHIP_OFFSET_CONFIG, config->active_time); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| ret = mfd_npm1300_reg_write(dev, SHIP_BASE, SHIP_OFFSET_LPCONFIG, config->lp_reset); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return mfd_npm1300_reg_write(dev, SHIP_BASE, SHIP_OFFSET_CFGSTROBE, 1U); |
| } |
| |
| int mfd_npm1300_reg_read_burst(const struct device *dev, uint8_t base, uint8_t offset, void *data, |
| size_t len) |
| { |
| const struct mfd_npm1300_config *config = dev->config; |
| uint8_t buff[] = {base, offset}; |
| |
| return i2c_write_read_dt(&config->i2c, buff, sizeof(buff), data, len); |
| } |
| |
| int mfd_npm1300_reg_read(const struct device *dev, uint8_t base, uint8_t offset, uint8_t *data) |
| { |
| return mfd_npm1300_reg_read_burst(dev, base, offset, data, 1U); |
| } |
| |
| int mfd_npm1300_reg_write(const struct device *dev, uint8_t base, uint8_t offset, uint8_t data) |
| { |
| const struct mfd_npm1300_config *config = dev->config; |
| uint8_t buff[] = {base, offset, data}; |
| |
| return i2c_write_dt(&config->i2c, buff, sizeof(buff)); |
| } |
| |
| int mfd_npm1300_reg_write2(const struct device *dev, uint8_t base, uint8_t offset, uint8_t data1, |
| uint8_t data2) |
| { |
| const struct mfd_npm1300_config *config = dev->config; |
| uint8_t buff[] = {base, offset, data1, data2}; |
| |
| return i2c_write_dt(&config->i2c, buff, sizeof(buff)); |
| } |
| |
| int mfd_npm1300_reg_update(const struct device *dev, uint8_t base, uint8_t offset, uint8_t data, |
| uint8_t mask) |
| { |
| struct mfd_npm1300_data *mfd_data = dev->data; |
| uint8_t reg; |
| int ret; |
| |
| k_mutex_lock(&mfd_data->mutex, K_FOREVER); |
| |
| ret = mfd_npm1300_reg_read(dev, base, offset, ®); |
| |
| if (ret == 0) { |
| reg = (reg & ~mask) | (data & mask); |
| ret = mfd_npm1300_reg_write(dev, base, offset, reg); |
| } |
| |
| k_mutex_unlock(&mfd_data->mutex); |
| |
| return ret; |
| } |
| |
| int mfd_npm1300_set_timer(const struct device *dev, uint32_t time_ms) |
| { |
| const struct mfd_npm1300_config *config = dev->config; |
| uint8_t buff[5] = {TIME_BASE, TIME_OFFSET_TIMER}; |
| uint32_t ticks = time_ms / TIMER_PRESCALER_MS; |
| |
| if (ticks > TIMER_MAX) { |
| return -EINVAL; |
| } |
| |
| sys_put_be24(ticks, &buff[2]); |
| |
| int ret = i2c_write_dt(&config->i2c, buff, sizeof(buff)); |
| |
| if (ret != 0) { |
| return ret; |
| } |
| |
| return mfd_npm1300_reg_write(dev, TIME_BASE, TIME_OFFSET_LOAD, 1U); |
| } |
| |
| int mfd_npm1300_reset(const struct device *dev) |
| { |
| return mfd_npm1300_reg_write(dev, MAIN_BASE, MAIN_OFFSET_RESET, 1U); |
| } |
| |
| int mfd_npm1300_hibernate(const struct device *dev, uint32_t time_ms) |
| { |
| int ret = mfd_npm1300_set_timer(dev, time_ms); |
| |
| if (ret != 0) { |
| return ret; |
| } |
| |
| return mfd_npm1300_reg_write(dev, SHIP_BASE, SHIP_OFFSET_HIBERNATE, 1U); |
| } |
| |
| int mfd_npm1300_add_callback(const struct device *dev, struct gpio_callback *callback) |
| { |
| struct mfd_npm1300_data *data = dev->data; |
| |
| /* Enable interrupts for specified events */ |
| for (int i = 0; i < NPM1300_EVENT_MAX; i++) { |
| if ((callback->pin_mask & BIT(i)) != 0U) { |
| /* Clear pending interrupt */ |
| int ret = mfd_npm1300_reg_write(data->dev, MAIN_BASE, |
| event_reg[i].offset + MAIN_OFFSET_CLR, |
| event_reg[i].mask); |
| |
| if (ret < 0) { |
| return ret; |
| } |
| |
| ret = mfd_npm1300_reg_write(data->dev, MAIN_BASE, |
| event_reg[i].offset + MAIN_OFFSET_INTENSET, |
| event_reg[i].mask); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| } |
| |
| return gpio_manage_callback(&data->callbacks, callback, true); |
| } |
| |
| int mfd_npm1300_remove_callback(const struct device *dev, struct gpio_callback *callback) |
| { |
| struct mfd_npm1300_data *data = dev->data; |
| |
| return gpio_manage_callback(&data->callbacks, callback, false); |
| } |
| |
| #define MFD_NPM1300_DEFINE(inst) \ |
| static struct mfd_npm1300_data data_##inst; \ |
| \ |
| static const struct mfd_npm1300_config config##inst = { \ |
| .i2c = I2C_DT_SPEC_INST_GET(inst), \ |
| .host_int_gpios = GPIO_DT_SPEC_INST_GET_OR(inst, host_int_gpios, {0}), \ |
| .pmic_int_pin = DT_INST_PROP_OR(inst, pmic_int_pin, 0), \ |
| .active_time = DT_INST_ENUM_IDX(inst, ship_to_active_time_ms), \ |
| .lp_reset = DT_INST_ENUM_IDX_OR(inst, long_press_reset, 0), \ |
| }; \ |
| \ |
| DEVICE_DT_INST_DEFINE(inst, mfd_npm1300_init, NULL, &data_##inst, &config##inst, \ |
| POST_KERNEL, CONFIG_MFD_NPM1300_INIT_PRIORITY, NULL); |
| |
| DT_INST_FOREACH_STATUS_OKAY(MFD_NPM1300_DEFINE) |