From 079424a954cf0c697b65492a2d6a38f1938fe1bf Mon Sep 17 00:00:00 2001
From: Kuiying Wang <kuiying.wang@intel.com>
Date: Tue, 7 Jul 2020 13:41:48 +0800
Subject: [PATCH] ast2500: parse reset reason.

Signed-off-by: Kuiying Wang <kuiying.wang@intel.com>

---
 arch/arm/mach-aspeed/ast-scu.c | 39 +++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-aspeed/ast-scu.c b/arch/arm/mach-aspeed/ast-scu.c
index 28c48c1154..ff90c0fc7e 100644
--- a/arch/arm/mach-aspeed/ast-scu.c
+++ b/arch/arm/mach-aspeed/ast-scu.c
@@ -596,9 +596,46 @@ void ast_scu_security_info(void)
 void ast_scu_sys_rest_info(void)
 {
 	u32 rest = ast_scu_read(AST_SCU_SYS_CTRL);
+	bool unknown_flag = true;
 
 #ifdef AST_SOC_G5
-	printf("RST : 0x%02x\n", rest);
+	printf("RST : 0x%02x (", rest);
+	if (rest & SCU_SYS_EXT_RESET_FLAG) {
+		unknown_flag = false;
+		printf("External");
+	}
+	if (rest & SCU_SYS_WDT_RESET_FLAG) {
+		if (unknown_flag)
+			printf("WDT1");
+		else
+			printf("|WDT1");
+		unknown_flag = false;
+	}
+	if (rest & SCU_SYS_WDT2_RESET_FLAG) {
+		if (unknown_flag)
+			printf("WDT2");
+		else
+			printf("|WDT2");
+		unknown_flag = false;
+	}
+	if (rest & SCU_SYS_WDT3_RESET_FLAG) {
+		if (unknown_flag)
+			printf("WDT3");
+		else
+			printf("|WDT3");
+		unknown_flag = false;
+	}
+	if (rest & SCU_SYS_PWR_RESET_FLAG) {
+		if (unknown_flag)
+			printf("Power On");
+		else
+			printf("|Power On");
+		unknown_flag = false;
+	}
+	if (unknown_flag) {
+		printf("Unknown");
+	}
+	printf(")\n");
 #else
 	if (rest & SCU_SYS_EXT_RESET_FLAG) {
 		printf("RST : External\n");