From 82a5648f5604709ae405b7faf23e68dc700b58d9 Mon Sep 17 00:00:00 2001
From: Bin Meng <bmeng.cn@gmail.com>
Date: Fri, 21 Apr 2017 07:24:45 -0700
Subject: [PATCH] x86: acpi: Turn on ACPI mode for S3

Before jumping to OS waking up vector, we need turn on ACPI mode
for S3, just like what we do for a normal boot.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Stefan Roese <sr@denx.de>
---
 arch/x86/lib/acpi_s3.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/lib/acpi_s3.c b/arch/x86/lib/acpi_s3.c
index e5cc3b0766..0b62b75908 100644
--- a/arch/x86/lib/acpi_s3.c
+++ b/arch/x86/lib/acpi_s3.c
@@ -24,6 +24,9 @@ void acpi_resume(struct acpi_fadt *fadt)
 {
 	void *wake_vec;
 
+	/* Turn on ACPI mode for S3 */
+	enter_acpi_mode(fadt->pm1a_cnt_blk);
+
 	wake_vec = acpi_find_wakeup_vector(fadt);
 
 	post_code(POST_OS_RESUME);