[U-Boot] [PATCH 1/9] mpc85xx: fix interrupt init to not affect watchdog

[Rainer Boschung]

TCR watchdog bit are overwritten when dec interrupt is enabled.
This has been fixed with this patch.

Signed-off-by: Rainer Boschung <rainer.boschung at keymile.com>
---
 arch/powerpc/cpu/mpc85xx/interrupts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/cpu/mpc85xx/interrupts.c b/arch/powerpc/cpu/mpc85xx/interrupts.c
index a36a4af..daf46a9 100644
--- a/arch/powerpc/cpu/mpc85xx/interrupts.c
+++ b/arch/powerpc/cpu/mpc85xx/interrupts.c
@@ -42,7 +42,7 @@ int interrupt_init_cpu(unsigned int *decrementer_count)
 	*decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
 
 	/* PIE is same as DIE, dec interrupt enable */
-	mtspr(SPRN_TCR, TCR_PIE);
+	mtspr(SPRN_TCR, mfspr(SPRN_TCR) | TCR_PIE);
 
 #ifdef CONFIG_INTERRUPTS
 	pic->iivpr1 = 0x810001;	/* 50220 enable ecm interrupts */
-- 
1.8.0.1