From: Ye Li Date: Mon, 9 Dec 2019 08:47:18 +0000 (-0800) Subject: imx8m: Enable WDOG_B for timeout X-Git-Url: http://git.dujemihanovic.xyz/img/static/%7B%7B%20%24.Site.BaseURL%20%7D%7Dposts/index.xml?a=commitdiff_plain;h=7247974643aa8b924504f901f6fd9d6bc4f1f2fd;p=u-boot.git imx8m: Enable WDOG_B for timeout 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 Acked-by: Peng Fan Signed-off-by: Ye Li Signed-off-by: Peng Fan --- diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index 8b6be7bc19..f10b71c345 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -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