armv8: lx2160a: fix reset sequence

Make sure that SW_RST_REQ and RST_REQ_MSK are cleared
before triggering hardware reset request.

Signed-off-by: Thirupathaiah Annapureddy <thiruan@linux.microsoft.com>
Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index 8a2f4048ecb469ca8ad389f5890d50135f4bc2ba..e610528544eea98649f4bae2a39aabfdaa38e41b 100644 (file)
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright 2017-2019 NXP
+ * Copyright 2017-2020 NXP
  * Copyright 2014-2015 Freescale Semiconductor, Inc.
  */
 
@@ -1229,13 +1229,15 @@ __efi_runtime_data u32 __iomem *rstcr = (u32 *)CONFIG_SYS_FSL_RST_ADDR;
 
 void __efi_runtime reset_cpu(ulong addr)
 {
-       u32 val;
-
 #ifdef CONFIG_ARCH_LX2160A
-       val = in_le32(rstcr);
-       val |= 0x01;
-       out_le32(rstcr, val);
+       /* clear the RST_REQ_MSK and SW_RST_REQ */
+       out_le32(rstcr, 0x0);
+
+       /* initiate the sw reset request */
+       out_le32(rstcr, 0x1);
 #else
+       u32 val;
+
        /* Raise RESET_REQ_B */
        val = scfg_in32(rstcr);
        val |= 0x02;