Re: [PATCH 19/22] ARM: sunxi: Add earlyprintk support using R_UART (sun6i/sun8i)

Maxime Ripard
2014-05-25T19:42:29Z

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Hi,

On Fri, May 23, 2014 at 03:51:22PM +0800, Chen-Yu Tsai wrote:
> sun6i/sun8i have a UART in the RTC block group, which can be used
> as an early console. This is most useful on sun8i as UART0 is muxed
> with MMC0, which is not available if we boot from MMC.
>
> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
> ---
> arch/arm/Kconfig.debug | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
> index eab8ecb..9e22708 100644
> --- a/arch/arm/Kconfig.debug
> +++ b/arch/arm/Kconfig.debug
> @@ -694,6 +694,14 @@ choice
> Say Y here if you want kernel low-level debugging support
> on Allwinner A1X based platforms on the UART1.
>
> + config DEBUG_SUNXI_R_UART
> + bool "Kernel low-level debugging messages via sunXi R_UART"
> + depends on ARCH_SUNXI

It should rather depend on MACH_SUN8I.

Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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