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x86: chromebook_link: Enable the debug UART

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Add support for the debug UART on link. This is useful for early debugging.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-10-18 19:51:27 -06:00
parent 60994a02a5
commit 7b95252d82
2 changed files with 11 additions and 0 deletions
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7
arch/x86/cpu/ivybridge/cpu.c
View File

@ -340,3 +340,10 @@ int print_cpuinfo(void)
return 0; return 0;
} }
void board_debug_uart_init(void)
{
/* This enables the debug UART */
pci_x86_write_config(NULL, PCH_LPC_DEV, LPC_EN, COMA_LPC_EN,
PCI_SIZE_16);
}

4
configs/chromebook_link_defconfig
View File

@ -22,6 +22,10 @@ CONFIG_CROS_EC_LPC=y
CONFIG_SPI_FLASH=y CONFIG_SPI_FLASH=y
CONFIG_DM_PCI=y CONFIG_DM_PCI=y
CONFIG_DM_RTC=y CONFIG_DM_RTC=y
CONFIG_DEBUG_UART=y
CONFIG_DEBUG_UART_BASE=0x3f8
CONFIG_DEBUG_UART_CLOCK=1843200
CONFIG_DEBUG_UART_BOARD_INIT=y
CONFIG_DM_TPM=y CONFIG_DM_TPM=y
CONFIG_TPM_TIS_LPC=y CONFIG_TPM_TIS_LPC=y
CONFIG_VIDEO_VESA=y CONFIG_VIDEO_VESA=y