ARM: i.MX system: Add a reset fallback if base address of watchdog is not set

This patch adds a reset fallback if base address of watchdog is not set.
This is intended for a targets not compatible with imx-21 watchdog,
i.MX1 for example.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
index 92d11c271222..d14c33fd6b03 100644
--- a/arch/arm/mach-imx/system.c
+++ b/arch/arm/mach-imx/system.c
@@ -42,6 +42,9 @@ void mxc_restart(enum reboot_mode mode, const char *cmd)
 {
         unsigned int wcr_enable;
 
+        if (!wdog_base)
+                goto reset_fallback;
+
         if (!IS_ERR(wdog_clk))
                 clk_enable(wdog_clk);
 
@@ -70,6 +73,7 @@ void mxc_restart(enum reboot_mode mode, const char *cmd)
         /* delay to allow the serial port to show the message */
         mdelay(50);
 
+reset_fallback:
         /* we'll take a jump through zero as a poor second */
         soft_restart(0);
 }