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From 44321f61f0b0edbde3300cc43b2f3e9f9fd93d44 Mon Sep 17 00:00:00 2001
From: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
Date: Mon, 26 Apr 2021 13:20:21 -0700
Subject: [PATCH] Set UART routing in lowlevel_init
This commit sets the UART routing back to default in lowlevel_init
to prevent any data dropping from the physical host serial until
SOL service is activated.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
---
arch/arm/mach-aspeed/ast2600/platform.S | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm/mach-aspeed/ast2600/platform.S b/arch/arm/mach-aspeed/ast2600/platform.S
index e2fcb732b6a6..4cc22e31c604 100644
--- a/arch/arm/mach-aspeed/ast2600/platform.S
+++ b/arch/arm/mach-aspeed/ast2600/platform.S
@@ -80,6 +80,9 @@
#define AST_GPIO_BASE (0x1E780000)
#define AST_GPIOYZ_DATA_VALUE (AST_GPIO_BASE + 0x1E0)
+#define AST_LPC_BASE 0x1E789000
+#define AST_LPC_HICRA (AST_LPC_BASE + 0x09C)
+
/* Revision ID */
#define REV_ID_AST2600A0 0x05000303
#define REV_ID_AST2600A1 0x05010303
@@ -433,6 +436,11 @@ skip_fill_wip_bit:
moveq r1, #0xff
str r1, [r0]
+ /* set UART routing back to default */
+ ldr r0, =AST_LPC_HICRA
+ ldr r1, =0x0
+ str r1, [r0]
+
/* relocate mailbox insn. for cpuN polling SMP go signal */
adrl r0, mailbox_insn
adrl r1, mailbox_insn_end
--
2.17.1
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