ARM: 5774/1: Fix Realview ARM1176PB board reboot

This is the fix for proper reboot of Realview ARM1176PB board
when issuing the reboot command. Setting the eighth bit of
control register SYS_RESETCTL to 1 to force a soft reset.
arch_reset() is modified for realview machines to call machine
specific reset function pointers.

Signed-off-by: Philby John <pjohn@in.mvista.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 4 insertions, 6 deletions

diff --git a/arch/arm/mach-realview/include/mach/system.h b/arch/arm/mach-realview/include/mach/system.h
index 1a15a441e027..a30f2e3ec178 100644
--- a/arch/arm/mach-realview/include/mach/system.h
+++ b/arch/arm/mach-realview/include/mach/system.h
@@ -25,6 +25,8 @@
 #include <mach/hardware.h>
 #include <mach/platform.h>
 
+void (*realview_reset)(char mode);
+
 static inline void arch_idle(void)
 {
         /*
@@ -36,16 +38,12 @@ static inline void arch_idle(void)
 
 static inline void arch_reset(char mode, const char *cmd)
 {
-        void __iomem *hdr_ctrl = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_RESETCTL_OFFSET;
-        unsigned int val;
-
         /*
          * To reset, we hit the on-board reset register
          * in the system FPGA
          */
-        val = __raw_readl(hdr_ctrl);
-        val |= REALVIEW_SYS_CTRL_RESET_CONFIGCLR;
-        __raw_writel(val, hdr_ctrl);
+        if (realview_reset)
+                realview_reset(mode);
 }
 
 #endif