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/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-08-09 Your Name The first version for MCXN236
*/
#include <rtthread.h>
#include "drv_wdt.h"
#include "fsl_wwdt.h"
#include "fsl_clock.h"
#ifdef RT_USING_WDT
#define WDT_CLK_FREQ CLOCK_GetWdtClkFreq(0)
struct mcx_wdt
{
rt_watchdog_t watchdog;
WWDT_Type *wdt_base;
clock_name_t clock_src;
clock_ip_name_t clock_ip_name;
};
static struct mcx_wdt wdt_dev;
static rt_err_t wdt_init(rt_watchdog_t *wdt)
{
uint32_t wdtFreq;
wwdt_config_t config;
/* The WDT divides the input frequency into it by 4 */
wdtFreq = WDT_CLK_FREQ / 4;
/* Enable FRO 1M clock for WWDT module. */
SYSCON->CLOCK_CTRL |= SYSCON_CLOCK_CTRL_FRO1MHZ_CLK_ENA_MASK;
WWDT_GetDefaultConfig(&config);
config.timeoutValue = wdtFreq * 1;
config.windowValue = wdtFreq * 1;
/* Configure WWDT to reset on timeout */
config.enableWatchdogReset = true;
/* Setup watchdog clock frequency(Hz). */
config.clockFreq_Hz = WDT_CLK_FREQ;
CLOCK_EnableClock(wdt_dev.clock_ip_name);
CLOCK_SetClkDiv(kCLOCK_DivWdt0Clk, 1U);
WWDT_Init(wdt_dev.wdt_base, &config);
return RT_EOK;
}
static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
{
switch (cmd)
{
case RT_DEVICE_CTRL_WDT_START:
WWDT_Enable(wdt_dev.wdt_base);
return RT_EOK;
case RT_DEVICE_CTRL_WDT_STOP:
WWDT_Disable(wdt_dev.wdt_base);
return RT_EOK;
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
WWDT_Refresh(wdt_dev.wdt_base);
return RT_EOK;
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
if (arg != RT_NULL)
{
uint32_t timeout = *((uint32_t *)arg);
timeout = timeout * WDT_CLK_FREQ / 4;
WWDT_SetTimeoutValue(wdt_dev.wdt_base, timeout);
return RT_EOK;
}
return -RT_ERROR;
default:
return -RT_ERROR;
}
}
static struct rt_watchdog_ops wdt_ops =
{
wdt_init,
wdt_control,
};
int rt_hw_wdt_init(void)
{
wdt_dev.wdt_base = WWDT0;
wdt_dev.clock_src = kCLOCK_Clk1M;
wdt_dev.clock_ip_name = kCLOCK_Wwdt0;
wdt_dev.watchdog.ops = &wdt_ops;
if (rt_hw_watchdog_register(&wdt_dev.watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
{
rt_kprintf("wdt register failed\n");
return -RT_ERROR;
}
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_wdt_init);
#endif /* RT_USING_WDT */
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