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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-02-25 GuEe-GUI the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#define DBG_TAG "reset.gpio.restart"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
struct gpio_restart
{
rt_ubase_t pin;
rt_uint8_t active_value;
rt_uint32_t wait_delay_ms;
rt_uint32_t active_delay_ms;
rt_uint32_t inactive_delay_ms;
};
static rt_err_t gpio_restart_do_restart(struct rt_device *dev)
{
struct gpio_restart *gr = dev->user_data;
rt_pin_mode(gr->pin, PIN_MODE_OUTPUT);
rt_thread_mdelay(gr->active_delay_ms);
rt_pin_write(gr->pin, !gr->active_value);
rt_thread_mdelay(gr->inactive_delay_ms);
rt_pin_write(gr->pin, gr->active_value);
rt_thread_mdelay(gr->wait_delay_ms);
return RT_EOK;
}
static rt_err_t gpio_restart_probe(struct rt_platform_device *pdev)
{
rt_err_t err;
struct rt_device *dev = &pdev->parent;
struct gpio_restart *gr = rt_calloc(1, sizeof(*gr));
if (!gr)
{
return -RT_ENOMEM;
}
gr->pin = rt_pin_get_named_pin(dev, RT_NULL, 0, RT_NULL, &gr->active_value);
if (gr->pin < 0)
{
err = gr->pin;
goto _fail;
}
gr->active_delay_ms = 100;
gr->inactive_delay_ms = 100;
gr->wait_delay_ms = 3000;
rt_dm_dev_prop_read_u32(dev, "active-delay", &gr->active_delay_ms);
rt_dm_dev_prop_read_u32(dev, "inactive-delay", &gr->inactive_delay_ms);
rt_dm_dev_prop_read_u32(dev, "wait-delay", &gr->wait_delay_ms);
dev->user_data = gr;
if ((err = rt_dm_power_off_handler(dev, RT_DM_POWER_OFF_MODE_RESET,
RT_DM_POWER_OFF_PRIO_DEFAULT, gpio_restart_do_restart)))
{
goto _fail;
}
return RT_EOK;
_fail:
rt_free(gr);
return err;
}
static const struct rt_ofw_node_id gpio_restart_ofw_ids[] =
{
{ .compatible = "gpio-restart" },
{ /* sentinel */ }
};
static struct rt_platform_driver gpio_restart_driver =
{
.name = "reset-gpio-restart",
.ids = gpio_restart_ofw_ids,
.probe = gpio_restart_probe,
};
RT_PLATFORM_DRIVER_EXPORT(gpio_restart_driver);
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