From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Fri, 16 Nov 2012 10:20:35 +0100 Subject: [PATCH 4/6] ARM: sunxi: Add earlyprintk support In-Reply-To: <50A5EF7E.6080801@denx.de> References: <1353019586-21043-1-git-send-email-maxime.ripard@free-electrons.com> <1353019586-21043-5-git-send-email-maxime.ripard@free-electrons.com> <50A5EF7E.6080801@denx.de> Message-ID: <50A60563.2040602@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Le 16/11/2012 08:47, Stefan Roese a ?crit : > On 11/15/2012 11:46 PM, Maxime Ripard wrote: >> Signed-off-by: Maxime Ripard >> --- >> arch/arm/Kconfig.debug | 8 ++++++++ >> arch/arm/include/debug/sunxi.S | 22 ++++++++++++++++++++++ >> 2 files changed, 30 insertions(+) >> create mode 100644 arch/arm/include/debug/sunxi.S >> >> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug >> index b0f3857..6672b02 100644 >> --- a/arch/arm/Kconfig.debug >> +++ b/arch/arm/Kconfig.debug >> @@ -345,6 +345,13 @@ choice >> Say Y here if you want kernel low-level debugging support >> on SOCFPGA based platforms. >> >> + config DEBUG_SUNXI_UART >> + bool "Kernel low-level debugging messages via sunXi UART" >> + depends on ARCH_SUNXI >> + help >> + Say Y here if you want kernel low-level debugging support >> + on Allwinner A1X based platforms. >> >> config DEBUG_VEXPRESS_UART0_DETECT >> bool "Autodetect UART0 on Versatile Express Cortex-A core tiles" >> depends on ARCH_VEXPRESS && CPU_CP15_MMU >> @@ -416,6 +423,7 @@ config DEBUG_LL_INCLUDE >> default "debug/mvebu.S" if DEBUG_MVEBU_UART >> default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART >> default "debug/socfpga.S" if DEBUG_SOCFPGA_UART >> + default "debug/sunxi.S" if DEBUG_SUNXI_UART >> default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \ >> DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1 >> default "mach/debug-macro.S" >> diff --git a/arch/arm/include/debug/sunxi.S b/arch/arm/include/debug/sunxi.S >> new file mode 100644 >> index 0000000..ffd101f >> --- /dev/null >> +++ b/arch/arm/include/debug/sunxi.S >> @@ -0,0 +1,22 @@ >> +/* >> + * Early serial output macro for Allwinner A1X SoCs >> + * >> + * Copyright (C) 2012 Maxime Ripard >> + * >> + * Maxime Ripard >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> +*/ >> + >> +#define SUNXI_UART1_PHYS_BASE 0x01c28400 >> +#define SUNXI_UART1_VIRT_BASE 0xf1c28400 >> + >> + .macro addruart, rp, rv, tmp >> + ldr \rp, =SUNXI_UART1_PHYS_BASE >> + ldr \rv, =SUNXI_UART1_VIRT_BASE >> + .endm >> + >> +#define UART_SHIFT 2 >> +#include > > A10 (cubieboard) has debug the UART on UART0 instead of UART1 as on A13. > So we need support this here as well. I suggest that I add support debug > on UART0 with my cubieboard patches. Ok, we'll do it that way then. Thanks! Maxime -- Maxime Ripard, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com