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authorWill Deacon <will.deacon@arm.com>2011-10-03 18:29:03 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-10-17 09:03:03 +0100
commitf73765fcb8bb79e80af58059441eb931679e68c0 (patch)
tree80ccf1b56155904432390b00e4a0870b511547cc /arch/arm/Kconfig.debug
parent6996f425e57d58a6f1884b7fd4bfc3ed3dd10c2d (diff)
ARM: 7116/1: debug: provide dummy default option for DEBUG_LL UART choice
Defaulting to DEBUG_ICEDCC will cause systems to hang during boot unless a hardware debugger is listening to the debug comms. channel. This patch adds a dummy UART option as the default DEBUG_LL choice which requires the platform to do the right thing. Acked-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig.debug')
-rw-r--r--arch/arm/Kconfig.debug12
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 91a826308d56..b3dc1fa30848 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -81,6 +81,14 @@ choice
prompt "Kernel low-level debugging port"
depends on DEBUG_LL
+ config DEBUG_LL_UART_NONE
+ bool "No low-level debugging UART"
+ help
+ Say Y here if your platform doesn't provide a UART option
+ below. This relies on your platform choosing the right UART
+ definition internally in order for low-level debugging to
+ work.
+
config DEBUG_ICEDCC
bool "Kernel low-level debugging via EmbeddedICE DCC channel"
help
@@ -89,8 +97,8 @@ choice
co-processor 14. This is known to work on the ARM9 style ICE
channel and on the XScale with the PEEDI.
- It does include a timeout to ensure that the system does not
- totally freeze when there is nothing connected to read.
+ Note that the system will appear to hang during boot if there
+ is nothing connected to read from the DCC.
config DEBUG_FOOTBRIDGE_COM1
bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"