ARM: 5864/1: Implement arch_reset() in NUC900

Implement arch_reset(), reboot from shell become possible.

Signed-off-by: lijie <eltshanli@gmail.com>
Acked-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 14 insertions, 1 deletions

diff --git a/arch/arm/mach-w90x900/include/mach/system.h b/arch/arm/mach-w90x900/include/mach/system.h
index 940640066857..ce228bdc66dd 100644
--- a/arch/arm/mach-w90x900/include/mach/system.h
+++ b/arch/arm/mach-w90x900/include/mach/system.h
@@ -15,7 +15,15 @@
  *
  */
 
+#include <linux/io.h>
 #include <asm/proc-fns.h>
+#include <mach/map.h>
+#include <mach/regs-timer.h>
+
+#define WTCR    (TMR_BA + 0x1C)
+#define WTCLK   (1 << 10)
+#define WTE     (1 << 7)
+#define WTRE    (1 << 1)
 
 static void arch_idle(void)
 {
@@ -23,6 +31,11 @@ static void arch_idle(void)
 
 static void arch_reset(char mode, const char *cmd)
 {
-        cpu_reset(0);
+        if (mode == 's') {
+                /* Jump into ROM at address 0 */
+                cpu_reset(0);
+        } else {
+                __raw_writel(WTE | WTRE | WTCLK, WTCR);
+        }
 }