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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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