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imx8m: Enable WDOG_B for timeout

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When doing reset_cpu, in normal case the WDOG_B outputs immediately
after we clean WDA bit. But on mscale, the WDOG_B may be later than
internal reset, and cause PMIC not reset. As we enabled the SD3.0
support, the PMIC must be reset to reset SD card.

Change the reset_cpu to enable the WDOG_B for timeout as well, and set
WDOG timeout to 1s.

Reviewed-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li 2019-12-09 00:47:18 -08:00 committed by Stefano Babic
parent 1c97fcda7f
commit 7247974643
1 changed files with 10 additions and 10 deletions
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20
arch/arm/mach-imx/imx8m/soc.c
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@ -410,19 +410,19 @@ int ft_system_setup(void *blob, bd_t *bd)
#if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SYSRESET)
void reset_cpu(ulong addr)
{
struct watchdog_regs *wdog = (struct watchdog_regs *)addr;
struct watchdog_regs *wdog = (struct watchdog_regs *)addr;
if (!addr)
wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
if (!addr)
wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
/* Clear WDA to trigger WDOG_B immediately */
writew((WCR_WDE | WCR_SRS), &wdog->wcr);
/* Clear WDA to trigger WDOG_B immediately */
writew((SET_WCR_WT(1) | WCR_WDT | WCR_WDE | WCR_SRS), &wdog->wcr);
while (1) {
/*
* spin for .5 seconds before reset
*/
}
while (1) {
/*
* spin for 1 second before timeout reset
*/
}
}
#endif