linux-kernel - [PATCH v2 3/3] ARM: mach-moxart: add MOXA ART UART debug files

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Date:	Mon, 17 Jun 2013 13:08:03 +0200
From:	Jonas Jensen <jonas.jensen@...il.com>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	linux@....linux.org.uk, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org, arm@...nel.org,
	Jonas Jensen <jonas.jensen@...il.com>
Subject: [PATCH v2 3/3] ARM: mach-moxart: add MOXA ART UART debug files

Add MOXA ART kernel low-level debugging port support.

Signed-off-by: Jonas Jensen <jonas.jensen@...il.com>
---
 arch/arm/Kconfig.debug          |    8 ++++++++
 arch/arm/include/debug/moxart.S |   16 ++++++++++++++++
 2 files changed, 24 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/include/debug/moxart.S

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index e6a6ab1..d1ed6e5 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -447,6 +447,13 @@ choice
 		  Say Y here if you want kernel low-level debugging support
 		  on Allwinner A1X based platforms on the UART1.
 
+    config DEBUG_MOXART_UART0
+        bool "Kernel low-level debugging messages via MOXART UART0"
+        depends on ARCH_MOXART
+        help
+          Say Y here if you want kernel low-level debugging support
+          on MOXART based platforms on the UART0.
+
 	config DEBUG_TEGRA_UART
 		depends on ARCH_TEGRA
 		bool "Use Tegra UART for low-level debug"
@@ -668,6 +675,7 @@ config DEBUG_LL_INCLUDE
 	default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
 	default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
 	default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
+	default "debug/moxart.S" if DEBUG_MOXART_UART0
 	default "debug/tegra.S" if DEBUG_TEGRA_UART
 	default "debug/ux500.S" if DEBUG_UX500_UART
 	default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
diff --git a/arch/arm/include/debug/moxart.S b/arch/arm/include/debug/moxart.S
new file mode 100644
index 0000000..7ac7c76
--- /dev/null
+++ b/arch/arm/include/debug/moxart.S
@@ -0,0 +1,16 @@
+/* Copyright (C) 2013 Jonas Jensen <jonas.jensen@...il.com>
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License,
+ * or (at your option) any later version. */
+
+#define MOXART_UART_DEBUG_PHYS_BASE		0x98200000
+#define MOXART_UART_DEBUG_VIRT_BASE		0xf9820000
+
+.macro	addruart, rp, rv, tmp
+	ldr	\rp, =MOXART_UART_DEBUG_PHYS_BASE
+	ldr \rv, =MOXART_UART_DEBUG_VIRT_BASE
+.endm
+
+#define UART_SHIFT	2
+#include <asm/hardware/debug-8250.S>
-- 
1.7.2.5

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