blob: 8f53d1c60c0a0a1efee473a093dd160d6bde6408 [file] [log] [blame] [edit]
/*
* Copyright 2022 Google LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file File that collects common data and configs for RS1718S chip. The file
* doesn't provide any API itself. The feature-specific API should be provided
* in separated files e.g. GPIO API.
*
* This file is placed in drivers/gpio directory, because GPIO is only one
* supported feature at the moment. It can be move to tcpc dir in the future.
*/
#define DT_DRV_COMPAT richtek_rt1718s
#include "gpio_rt1718s.h"
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
#include <zephyr/sys/util_macro.h>
LOG_MODULE_REGISTER(gpio_rt1718s, CONFIG_GPIO_LOG_LEVEL);
static void rt1718s_alert_callback(const struct device *dev, struct gpio_callback *cb,
uint32_t pins)
{
ARG_UNUSED(pins);
struct rt1718s_data *data = CONTAINER_OF(cb, struct rt1718s_data, gpio_cb);
k_work_submit(&data->alert_worker);
}
static void rt1718s_alert_worker(struct k_work *work)
{
struct rt1718s_data *const data = CONTAINER_OF(work, struct rt1718s_data, alert_worker);
const struct device *const dev = data->dev;
const struct rt1718s_config *const config = dev->config;
uint16_t alert, mask;
do {
/* Read alert and mask */
k_sem_take(&data->lock_tcpci, K_FOREVER);
if (rt1718s_reg_burst_read(dev, RT1718S_REG_ALERT, (uint8_t *)&alert,
sizeof(alert)) ||
rt1718s_reg_burst_read(dev, RT1718S_REG_ALERT_MASK, (uint8_t *)&mask,
sizeof(mask))) {
k_sem_give(&data->lock_tcpci);
LOG_ERR("i2c access failed");
continue;
}
/* Content of the alert and alert mask registers are
* defined by the TCPCI specification - "A masked
* register will still indicate in the ALERT register,
* but shall not set the Alert# pin low"
*/
alert &= mask;
if (alert) {
/* Clear all alert bits that causes the interrupt */
if (rt1718s_reg_burst_write(dev, RT1718S_REG_ALERT, (uint8_t *)&alert,
sizeof(alert))) {
k_sem_give(&data->lock_tcpci);
LOG_ERR("i2c access failed");
continue;
}
}
k_sem_give(&data->lock_tcpci);
/* There are a few sources of the vendor
* defined alert for the RT1718S, but handle
* only GPIO at the moment.
*/
if (alert & RT1718S_REG_ALERT_VENDOR_DEFINED_ALERT) {
rt1718s_gpio_alert_handler(dev);
}
/* While the interrupt signal is still active, we have more work to do. */
} while (gpio_pin_get_dt(&config->irq_gpio));
}
static int rt1718s_init(const struct device *dev)
{
const struct rt1718s_config *const config = dev->config;
struct rt1718s_data *data = dev->data;
int ret;
/* Check I2C is ready */
if (!device_is_ready(config->i2c_dev.bus)) {
LOG_ERR("%s device not ready", config->i2c_dev.bus->name);
return -ENODEV;
}
k_sem_init(&data->lock_tcpci, 1, 1);
if (IS_ENABLED(CONFIG_GPIO_RT1718S_INTERRUPT)) {
if (!device_is_ready(config->irq_gpio.port)) {
LOG_ERR("%s device not ready", config->irq_gpio.port->name);
return -ENODEV;
}
/* Set the interrupt pin for handling the alert */
k_work_init(&data->alert_worker, rt1718s_alert_worker);
gpio_pin_configure_dt(&config->irq_gpio, GPIO_INPUT);
gpio_init_callback(&data->gpio_cb, rt1718s_alert_callback,
BIT(config->irq_gpio.pin));
ret = gpio_add_callback(config->irq_gpio.port, &data->gpio_cb);
if (ret < 0) {
return ret;
}
gpio_pin_interrupt_configure_dt(&config->irq_gpio, GPIO_INT_EDGE_TO_ACTIVE);
}
return 0;
}
#define CHECK_PORT_DEVICE(node_id) \
COND_CODE_1(DT_HAS_COMPAT_STATUS_OKAY(richtek_rt1718s_gpio_port), DEVICE_DT_GET(node_id), \
())
#define IRQ_GPIO(inst) \
COND_CODE_1(DT_INST_NODE_HAS_PROP(inst, irq_gpios), \
(.irq_gpio = GPIO_DT_SPEC_INST_GET(inst, irq_gpios)), ())
#define GET_PORT_DEVICE(inst) DT_INST_FOREACH_CHILD_STATUS_OKAY(inst, CHECK_PORT_DEVICE)
#define GPIO_RT1718S_DEVICE_INSTANCE(inst) \
static const struct rt1718s_config rt1718s_cfg_##inst = { \
.i2c_dev = I2C_DT_SPEC_INST_GET(inst), \
.gpio_port_dev = GET_PORT_DEVICE(inst), \
IRQ_GPIO(inst) \
}; \
static struct rt1718s_data rt1718s_data_##inst = { \
.dev = DEVICE_DT_INST_GET(inst), \
}; \
DEVICE_DT_INST_DEFINE(inst, rt1718s_init, NULL, &rt1718s_data_##inst, &rt1718s_cfg_##inst, \
POST_KERNEL, CONFIG_RT1718S_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(GPIO_RT1718S_DEVICE_INSTANCE)