Re: [PATCH 19/22] ARM: sunxi: Add earlyprintk support using R_UART (sun6i/sun8i)
From: Maxime Ripard <hidden>
Date: 2014-05-25 19:42:29
Also in:
linux-arm-kernel, linux-serial, lkml
Hi, On Fri, May 23, 2014 at 03:51:22PM +0800, Chen-Yu Tsai wrote:
quoted hunk ↗ jump to hunk
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 <redacted> --- 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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