[U-Boot] [PATCH v2 5/5] sunxi: Fix reset hang on sun5i

[Hans de Goede]

Do the same as the Linux kernel does, this fixes the SoC hanging on reset
about 50% of the time.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
Acked-by: Ian Campbell <ijc at hellion.org.uk>
---
 arch/arm/cpu/armv7/sunxi/board.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c
index 024c8c1..2898833 100644
--- a/arch/arm/cpu/armv7/sunxi/board.c
+++ b/arch/arm/cpu/armv7/sunxi/board.c
@@ -75,7 +75,11 @@ void reset_cpu(ulong addr)
 	/* Set the watchdog for its shortest interval (.5s) and wait */
 	writel(WDT_MODE_RESET_EN | WDT_MODE_EN, &wdog->mode);
 	writel(WDT_CTRL_KEY | WDT_CTRL_RESTART, &wdog->ctl);
-	while (1);
+
+	while (1) {
+		/* sun5i sometimes gets stuck without this */
+		writel(WDT_MODE_RESET_EN | WDT_MODE_EN, &wdog->mode);
+	}
 }
 
 /* do some early init */
-- 
2.0.0