[U-Boot] [PATCH v2 5/5] x86: chromebook_link: Enable the debug UART

[Bin Meng]

On Mon, Oct 19, 2015 at 9:51 AM, Simon Glass <sjg at chromium.org> wrote:
> Add support for the debug UART on link. This is useful for early debugging.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
> Changes in v2: None
>
>  arch/x86/cpu/ivybridge/cpu.c      | 7 +++++++
>  configs/chromebook_link_defconfig | 4 ++++
>  2 files changed, 11 insertions(+)
>
> diff --git a/arch/x86/cpu/ivybridge/cpu.c b/arch/x86/cpu/ivybridge/cpu.c
> index cce5923..0e6512c 100644
> --- a/arch/x86/cpu/ivybridge/cpu.c
> +++ b/arch/x86/cpu/ivybridge/cpu.c
> @@ -340,3 +340,10 @@ int print_cpuinfo(void)
>
>         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);
> +}
> diff --git a/configs/chromebook_link_defconfig b/configs/chromebook_link_defconfig
> index fbecf8b..78a9470 100644
> --- a/configs/chromebook_link_defconfig
> +++ b/configs/chromebook_link_defconfig
> @@ -22,6 +22,10 @@ CONFIG_CROS_EC_LPC=y
>  CONFIG_SPI_FLASH=y
>  CONFIG_DM_PCI=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_TPM_TIS_LPC=y
>  CONFIG_VIDEO_VESA=y
> --

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>