reset.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <device/mmio.h>
#include <soc/iomap.h>
#include <reset.h>
 
/* Watchdog bite time set to default reset value */
#define RESET_WDT_BITE_TIME 0x31F3
 
/* Watchdog bark time value is kept larger than the watchdog timeout
 * of 0x31F3, effectively disabling the watchdog bark interrupt
 */
#define RESET_WDT_BARK_TIME (5 * RESET_WDT_BITE_TIME)
 
static void wdog_reset(void)
{
        printk(BIOS_DEBUG, "\nResetting with watchdog!\n");
 
        write32(APCS_WDT0_EN, 0);
        write32(APCS_WDT0_RST, 1);
        write32(APCS_WDT0_BARK_TIME, RESET_WDT_BARK_TIME);
        write32(APCS_WDT0_BITE_TIME, RESET_WDT_BITE_TIME);
        write32(APCS_WDT0_EN, 1);
        write32(APCS_WDT0_CPU0_WDOG_EXPIRED_ENABLE, 1);
}
 
void do_board_reset(void)
{
        wdog_reset();
}