1 files changed, 73 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-ast2500/recipes-bsp/u-boot/files/0004-Make-sure-debug-uart-is-using-24MHz-clock-source.patch b/meta-openbmc-mods/meta-ast2500/recipes-bsp/u-boot/files/0004-Make-sure-debug-uart-is-using-24MHz-clock-source.patch
new file mode 100644
index 000000000..e7e6c56d7
--- /dev/null
+++ b/meta-openbmc-mods/meta-ast2500/recipes-bsp/u-boot/files/0004-Make-sure-debug-uart-is-using-24MHz-clock-source.patch
@@ -0,0 +1,73 @@
+From 954e7dd9ff9c5d1159f0896afa34c673061b82ea Mon Sep 17 00:00:00 2001
+From: Yong Li <yong.b.li@linux.intel.com>
+Date: Tue, 11 Sep 2018 16:24:06 +0800
+Subject: [PATCH] Make sure debug uart is using 24MHz clock source
+
+u-boot defines the uart5(debug console) as 24MHz,
+set the SCU14[28] to 0, to make sure the clock source is 24M
+
+Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
+
+---
+ arch/arm/include/asm/arch-aspeed/ast_scu.h  | 2 ++
+ arch/arm/include/asm/arch-aspeed/platform.h | 1 +
+ arch/arm/mach-aspeed/ast-scu.c              | 6 ++++++
+ board/aspeed/ast-g5/ast-g5.c                | 8 ++++++++
+ 4 files changed, 17 insertions(+)
+
+diff --git a/arch/arm/include/asm/arch-aspeed/ast_scu.h b/arch/arm/include/asm/arch-aspeed/ast_scu.h
+index dcbc673..06825ce 100644
+--- a/arch/arm/include/asm/arch-aspeed/ast_scu.h
++++ b/arch/arm/include/asm/arch-aspeed/ast_scu.h
+@@ -46,4 +46,6 @@ extern void ast_scu_init_eth(u8 num);
+ extern void ast_scu_multi_func_eth(u8 num);
+ extern void ast_scu_multi_func_romcs(u8 num);
+ 
++void ast_config_uart5_clk(void);
++
+ #endif
+diff --git a/arch/arm/include/asm/arch-aspeed/platform.h b/arch/arm/include/asm/arch-aspeed/platform.h
+index 1c02914..92ea33b 100644
+--- a/arch/arm/include/asm/arch-aspeed/platform.h
++++ b/arch/arm/include/asm/arch-aspeed/platform.h
+@@ -27,6 +27,7 @@
+ #include <asm/arch/ast2400_platform.h>
+ #elif defined(AST_SOC_G5)
+ #include <asm/arch/ast_g5_platform.h>
++#define CONFIG_BOARD_EARLY_INIT_F	1	/* Call board_early_init_f */
+ #else
+ #err "No define for platform.h"
+ #endif
+diff --git a/arch/arm/mach-aspeed/ast-scu.c b/arch/arm/mach-aspeed/ast-scu.c
+index 12de9b8..fff02dc 100644
+--- a/arch/arm/mach-aspeed/ast-scu.c
++++ b/arch/arm/mach-aspeed/ast-scu.c
+@@ -538,3 +538,9 @@ void ast_scu_get_who_init_dram(void)
+ 		break;
+ 	}
+ }
++
++void ast_config_uart5_clk(void)
++{
++	ast_scu_write(ast_scu_read(AST_SCU_MISC2_CTRL) &
++				~(1 << 28), AST_SCU_MISC2_CTRL);
++}
+diff --git a/board/aspeed/ast-g5/ast-g5.c b/board/aspeed/ast-g5/ast-g5.c
+index e67a4bf..5a1fade 100644
+--- a/board/aspeed/ast-g5/ast-g5.c
++++ b/board/aspeed/ast-g5/ast-g5.c
+@@ -16,6 +16,14 @@
+ 
+ DECLARE_GLOBAL_DATA_PTR;
+ 
++int board_early_init_f(void)
++{
++	/* make sure uart5 is using 24MHz clock */
++	ast_config_uart5_clk();
++
++	return 0;
++}
++
+ int board_init(void)
+ {
+ 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;