Hi,
I am able to set watchdog timer u-boot and its working and system will reboot after timeout.
But I am not able to reset watchdog timer in u-boot itself.
Here is the code snippet which will do watchdog timer reset.
I have added this function in arch/arm/cpu/arm926ejs/mxs/mxs.c
#define CONFIG_WATCHDOG_TIMEOUT_MSECS 20000 // 20sec
static bool hw_watchdog_init_done = 0;
void hw_watchdog_reset(void)
{
struct mxs_rtc_regs *rtc_regs =
(struct mxs_rtc_regs *)MXS_RTC_BASE;
if (!hw_watchdog_init_done)
return;
writel(CONFIG_WATCHDOG_TIMEOUT_MSECS, &rtc_regs->hw_rtc_watchdog);
}
void hw_watchdog_init(void)
{
struct mxs_rtc_regs *rtc_regs =
(struct mxs_rtc_regs *)MXS_RTC_BASE;
hw_watchdog_init_done = 1;
writel(RTC_PERSISTENT0_AUTO_RESTART, &rtc_regs->hw_rtc_persistent0_set);
writel(CONFIG_WATCHDOG_TIMEOUT_MSECS, &rtc_regs->hw_rtc_watchdog);
hw_watchdog_reset();
}
I am calling hw_watchdog_init() from board/freescale/mx28evk/mx28evk.c in board_init(). I have also enable hw watchdog (#define CONFIG_HW_WATCHDOG) in include/configs/mx28evk.h
One more things,
If I disable the code in hw_watchdog_reset() function and add writel(CONFIG_WATCHDOG_TIMEOUT_MSECS, &rtc_regs->hw_rtc_watchdog); in hw_watchdog_init() function then watchdog timer is working correct and board reset after timeout.
I want to reset Watchdog timer from hw_watchdog_reset() function before timeout occur. Is there any thing I am missing to reset watchdog timer? or missing anything to configure u-boot specific to watchdog reset functionality
Can anybody elaborate the way to reset watchdog timer?
-
Dhvanil Patel
