[Blackfin] arch: Fix BUG - kernel sometimes would stuck with KEYBOARD_GPIO on

Make sure the SYSTEM reset completes before we issue the CORE reset

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/reboot.c b/arch/blackfin/kernel/reboot.c
index ae28aac6fec1..06501a594dda 100644
--- a/arch/blackfin/kernel/reboot.c
+++ b/arch/blackfin/kernel/reboot.c
@@ -34,9 +34,11 @@ void bfin_reset(void)
         while (1) {
                 /* initiate system soft reset with magic 0x7 */
                 bfin_write_SWRST(0x7);
+                bfin_read_SWRST();
                 asm("ssync;");
                 /* clear system soft reset */
                 bfin_write_SWRST(0);
+                bfin_read_SWRST();
                 asm("ssync;");
                 /* issue core reset */
                 asm("raise 1");