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Commit f73765fc authored by Will Deacon's avatar Will Deacon Committed by Russell King
Browse files

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: default avatarStephen Boyd <sboyd@codeaurora.org>
Tested-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 6996f425

arch/arm/Kconfig.debug

+10 −2
Original line number Original line Diff line number Diff line
@@ -81,6 +81,14 @@ choice 
	prompt "Kernel low-level debugging port"

	prompt "Kernel low-level debugging port"

	depends on DEBUG_LL

	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

	config DEBUG_ICEDCC

		bool "Kernel low-level debugging via EmbeddedICE DCC channel"

		bool "Kernel low-level debugging via EmbeddedICE DCC channel"

		help

		help
@@ -89,8 +97,8 @@ choice 
		  co-processor 14. This is known to work on the ARM9 style ICE

		  co-processor 14. This is known to work on the ARM9 style ICE

		  channel and on the XScale with the PEEDI.

		  channel and on the XScale with the PEEDI.





		  It does include a timeout to ensure that the system does not

		  Note that the system will appear to hang during boot if there

		  totally freeze when there is nothing connected to read.

		  is nothing connected to read from the DCC.





	config DEBUG_FOOTBRIDGE_COM1

	config DEBUG_FOOTBRIDGE_COM1

		bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"

		bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"