ARM: digicolor: add low level debug support

Use the USART peripheral as UART for low level debug. Only the UA0 port is
currently supported.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 11 insertions, 2 deletions

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 453ae2feaeee..b6a073de1559 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -247,6 +247,13 @@ choice
                   Say Y here if you want the debug print routines to direct
                   their output to the serial port in the DC21285 (Footbridge).
 
+        config DEBUG_DIGICOLOR_UA0
+                bool "Kernel low-level debugging messages via Digicolor UA0"
+                depends on ARCH_DIGICOLOR
+                help
+                  Say Y here if you want the debug print routines to direct
+                  their output to the UA0 serial port in the CX92755.
+
         config DEBUG_FOOTBRIDGE_COM1
                 bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
                 depends on FOOTBRIDGE
@@ -1255,6 +1262,7 @@ config DEBUG_LL_INCLUDE
         default "debug/vt8500.S" if DEBUG_VT8500_UART0
         default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
         default "debug/bcm63xx.S" if DEBUG_UART_BCM63XX
+        default "debug/digicolor.S" if DEBUG_DIGICOLOR_UA0
         default "mach/debug-macro.S"
 
 # Compatibility options for PL01x
@@ -1377,7 +1385,7 @@ config DEBUG_UART_PHYS
                 DEBUG_RMOBILE_SCIFA0 || DEBUG_RMOBILE_SCIFA1 || \
                 DEBUG_RMOBILE_SCIFA4 || DEBUG_S3C24XX_UART || \
                 DEBUG_UART_BCM63XX || DEBUG_ASM9260_UART || \
-                DEBUG_SIRFSOC_UART
+                DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0
 
 config DEBUG_UART_VIRT
         hex "Virtual base address of debug UART"
@@ -1460,7 +1468,8 @@ config DEBUG_UART_VIRT
         depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
                 DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \
                 DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \
-                DEBUG_UART_BCM63XX || DEBUG_ASM9260_UART || DEBUG_SIRFSOC_UART
+                DEBUG_UART_BCM63XX || DEBUG_ASM9260_UART || \
+                DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0
 
 config DEBUG_UART_8250_SHIFT
         int "Register offset shift for the 8250 debug UART"