From 37d1023264e7b73b72e0c42fd55de91c7018135d Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Thu, 1 Jun 2017 03:41:13 -0700 Subject: [PATCH] x86: baytrail: Fix boot hang with a debug build It was observed that when -DDEBUG is used to generate a debug build, U-Boot does not boot on MinnowMax board. A workaround is to disable CONFIG_DEBUG_UART. The real issue is that in order to have the debug uart to work, BayTrail SoC needs to be configured so that its internal uart is available to be used as the debug uart. Signed-off-by: Bin Meng Reviewed-by: Stefan Roese Reviewed-by: Simon Glass --- arch/x86/cpu/baytrail/Kconfig | 4 ++++ arch/x86/cpu/baytrail/early_uart.c | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/arch/x86/cpu/baytrail/Kconfig b/arch/x86/cpu/baytrail/Kconfig index 1c8ac37..6c85186 100644 --- a/arch/x86/cpu/baytrail/Kconfig +++ b/arch/x86/cpu/baytrail/Kconfig @@ -17,4 +17,8 @@ config INTERNAL_UART reason, it is recommended that the UART port be used for debug purposes only, eg: U-Boot console. +config DEBUG_UART + bool + select DEBUG_UART_BOARD_INIT + endif diff --git a/arch/x86/cpu/baytrail/early_uart.c b/arch/x86/cpu/baytrail/early_uart.c index 471d592..afab21f 100644 --- a/arch/x86/cpu/baytrail/early_uart.c +++ b/arch/x86/cpu/baytrail/early_uart.c @@ -80,3 +80,8 @@ int setup_internal_uart(int enable) return 0; } + +void board_debug_uart_init(void) +{ + setup_internal_uart(1); +} -- 2.7.4