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sunxi: Implement reset_cpu

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There is no way to reset the cpu, so use the watchdog for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
This commit is contained in:
Hans de Goede 2014-06-09 11:36:56 +02:00 committed by Ian Campbell
parent b6ae6765c5
commit c7e79dec85
2 changed files with 12 additions and 0 deletions
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7
arch/arm/cpu/armv7/sunxi/board.c
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@ -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 */

5
arch/arm/include/asm/arch-sunxi/timer.h
View file

@ -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>