[PATCH 20/24] imx8m: Enable WDOG_B for timeout

[Peng Fan]

From: Ye Li <ye.li at nxp.com>

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.

Acked-by: Peng Fan <peng.fan at nxp.com>
Signed-off-by: Ye Li <ye.li at nxp.com>
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 arch/arm/mach-imx/imx8m/soc.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

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
 
-- 
2.16.4