blob: 35d143b5c4d4b8d17c51d530c5d56af462236d60 [file] [log] [blame] [edit]
/*
*
* Copyright (c) 2018, NXP
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_kinetis_wdog
#include <zephyr/drivers/watchdog.h>
#include <zephyr/drivers/clock_control.h>
#include <zephyr/irq.h>
#include <fsl_wdog.h>
#define LOG_LEVEL CONFIG_WDT_LOG_LEVEL
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(wdt_mcux_wdog);
#define MIN_TIMEOUT 4
struct mcux_wdog_config {
WDOG_Type *base;
const struct device *clock_dev;
clock_control_subsys_t clock_subsys;
void (*irq_config_func)(const struct device *dev);
};
struct mcux_wdog_data {
wdt_callback_t callback;
wdog_config_t wdog_config;
bool timeout_valid;
};
static int mcux_wdog_setup(const struct device *dev, uint8_t options)
{
const struct mcux_wdog_config *config = dev->config;
struct mcux_wdog_data *data = dev->data;
WDOG_Type *base = config->base;
if (!data->timeout_valid) {
LOG_ERR("No valid timeouts installed");
return -EINVAL;
}
data->wdog_config.workMode.enableStop =
(options & WDT_OPT_PAUSE_IN_SLEEP) == 0U;
data->wdog_config.workMode.enableDebug =
(options & WDT_OPT_PAUSE_HALTED_BY_DBG) == 0U;
WDOG_Init(base, &data->wdog_config);
LOG_DBG("Setup the watchdog");
return 0;
}
static int mcux_wdog_disable(const struct device *dev)
{
const struct mcux_wdog_config *config = dev->config;
struct mcux_wdog_data *data = dev->data;
WDOG_Type *base = config->base;
WDOG_Deinit(base);
data->timeout_valid = false;
LOG_DBG("Disabled the watchdog");
return 0;
}
static int mcux_wdog_install_timeout(const struct device *dev,
const struct wdt_timeout_cfg *cfg)
{
const struct mcux_wdog_config *config = dev->config;
struct mcux_wdog_data *data = dev->data;
uint32_t clock_freq;
if (data->timeout_valid) {
LOG_ERR("No more timeouts can be installed");
return -ENOMEM;
}
if (!device_is_ready(config->clock_dev)) {
LOG_ERR("clock control device not ready");
return -ENODEV;
}
if (clock_control_get_rate(config->clock_dev, config->clock_subsys,
&clock_freq)) {
return -EINVAL;
}
WDOG_GetDefaultConfig(&data->wdog_config);
data->wdog_config.timeoutValue = clock_freq * cfg->window.max / 1000U;
if (cfg->window.min) {
data->wdog_config.enableWindowMode = true;
data->wdog_config.windowValue =
clock_freq * cfg->window.min / 1000U;
} else {
data->wdog_config.enableWindowMode = false;
data->wdog_config.windowValue = 0;
}
if ((data->wdog_config.timeoutValue < MIN_TIMEOUT) ||
(data->wdog_config.timeoutValue < data->wdog_config.windowValue)) {
LOG_ERR("Invalid timeout");
return -EINVAL;
}
data->wdog_config.clockSource = kWDOG_LpoClockSource;
data->wdog_config.enableInterrupt = cfg->callback != NULL;
data->callback = cfg->callback;
data->timeout_valid = true;
return 0;
}
static int mcux_wdog_feed(const struct device *dev, int channel_id)
{
const struct mcux_wdog_config *config = dev->config;
WDOG_Type *base = config->base;
if (channel_id != 0) {
LOG_ERR("Invalid channel id");
return -EINVAL;
}
WDOG_Refresh(base);
LOG_DBG("Fed the watchdog");
return 0;
}
static void mcux_wdog_isr(const struct device *dev)
{
const struct mcux_wdog_config *config = dev->config;
struct mcux_wdog_data *data = dev->data;
WDOG_Type *base = config->base;
uint32_t flags;
flags = WDOG_GetStatusFlags(base);
WDOG_ClearStatusFlags(base, flags);
if (data->callback) {
data->callback(dev, 0);
}
}
static int mcux_wdog_init(const struct device *dev)
{
const struct mcux_wdog_config *config = dev->config;
config->irq_config_func(dev);
return 0;
}
static const struct wdt_driver_api mcux_wdog_api = {
.setup = mcux_wdog_setup,
.disable = mcux_wdog_disable,
.install_timeout = mcux_wdog_install_timeout,
.feed = mcux_wdog_feed,
};
static void mcux_wdog_config_func_0(const struct device *dev);
static const struct mcux_wdog_config mcux_wdog_config_0 = {
.base = (WDOG_Type *) DT_INST_REG_ADDR(0),
.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(0)),
.clock_subsys = (clock_control_subsys_t)
DT_INST_CLOCKS_CELL(0, name),
.irq_config_func = mcux_wdog_config_func_0,
};
static struct mcux_wdog_data mcux_wdog_data_0;
DEVICE_DT_INST_DEFINE(0,
&mcux_wdog_init,
NULL,
&mcux_wdog_data_0, &mcux_wdog_config_0,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&mcux_wdog_api);
static void mcux_wdog_config_func_0(const struct device *dev)
{
IRQ_CONNECT(DT_INST_IRQN(0),
DT_INST_IRQ(0, priority),
mcux_wdog_isr, DEVICE_DT_INST_GET(0), 0);
irq_enable(DT_INST_IRQN(0));
}