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ARM: digicolor: add low level debug support

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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>
This commit is contained in:
Baruch Siach
2015-01-14 10:40:31 +02:00
committed by Olof Johansson
parent df8d742e92
commit e23814da82
2 changed files with 46 additions and 2 deletions
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13
arch/arm/Kconfig.debug
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@@ -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"