Blackfin arch: use the Blackfin on-chip ROM to do software reset when possible

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/arch/blackfin/kernel/reboot.c b/arch/blackfin/kernel/reboot.c
index d0ead640d992..ae97ca407b0d 100644
--- a/arch/blackfin/kernel/reboot.c
+++ b/arch/blackfin/kernel/reboot.c
@@ -10,6 +10,7 @@
 #include <asm/bfin-global.h>
 #include <asm/reboot.h>
 #include <asm/system.h>
+#include <asm/bfrom.h>
 
 /* A system soft reset makes external memory unusable so force
  * this function into L1.  We use the compiler ssync here rather
@@ -74,7 +75,14 @@ void machine_restart(char *cmd)
 {
         native_machine_restart(cmd);
         local_irq_disable();
-        bfin_reset();
+        if (ANOMALY_05000353 || ANOMALY_05000386)
+                bfin_reset();
+        else
+                /* the bootrom checks to see how it was reset and will
+                 * automatically perform a software reset for us when
+                 * it starts executing boot
+                 */
+                asm("raise 1;");
 }
 
 __attribute__((weak))