There is no way to reset the cpu, so use the watchdog for this.
Signed-off-by: Hans de Goede hdegoede@redhat.com --- arch/arm/cpu/armv7/sunxi/board.c | 7 +++++++ arch/arm/include/asm/arch-sunxi/timer.h | 5 +++++ 2 files changed, 12 insertions(+)
diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c index 49c9448..c80b421 100644 --- a/arch/arm/cpu/armv7/sunxi/board.c +++ b/arch/arm/cpu/armv7/sunxi/board.c @@ -56,6 +56,13 @@ int gpio_init(void)
void reset_cpu(ulong addr) { + static const struct sunxi_wdog *wdog = + &((struct sunxi_timer_reg *)SUNXI_TIMER_BASE)->wdog; + + /* 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); }
/* do some early init */ diff --git a/arch/arm/include/asm/arch-sunxi/timer.h b/arch/arm/include/asm/arch-sunxi/timer.h index 6aacfd7..4a43ed9 100644 --- a/arch/arm/include/asm/arch-sunxi/timer.h +++ b/arch/arm/include/asm/arch-sunxi/timer.h @@ -11,6 +11,11 @@ #ifndef _SUNXI_TIMER_H_ #define _SUNXI_TIMER_H_
+#define WDT_CTRL_RESTART (0x1 << 0) +#define WDT_CTRL_KEY (0x0a57 << 1) +#define WDT_MODE_EN (0x1 << 0) +#define WDT_MODE_RESET_EN (0x1 << 1) + #ifndef __ASSEMBLY__
#include <linux/types.h>