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authorFeng Tang <feng.tang@intel.com>2010-09-13 15:08:55 +0800
committerIngo Molnar <mingo@elte.hu>2010-10-08 10:01:47 +0200
commitc20b5c3318fe45e4f33f01a91ccead645dfdf619 (patch)
tree7fb6e9ad8643b60c93ba2dc163c010f3b6978836 /arch/x86/Kconfig.debug
parent5a47c7dae861c3ca3edf178546641909851bf715 (diff)
downloadlinux-c20b5c3318fe45e4f33f01a91ccead645dfdf619.tar.gz
x86, earlyprintk: Add earlyprintk for Intel Moorestown platform
Intel Moorestown platform has a spi-uart device(Maxim3110), which connects to a Designware spi core controller. This patch will add early console function based on it. As it will be used long before Linux spi subsystem get initialised, we simply directly manipulate the spi controller's register to acheive the early console func. This is safe as it will be disabled when devices subsytem get initialised. To use it, user need enable CONFIG_X86_MRST_EARLY_PRINTK in kenrel config and add "earlyprintk=mrst" in kernel command line. Signed-off-by: Feng Tang <feng.tang@intel.com> Acked-by: Alan Cox <alan@linux.intel.com> Cc: greg@kroah.com LKML-Reference: <1284361736-23011-4-git-send-email-feng.tang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig.debug')
-rw-r--r--arch/x86/Kconfig.debug4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 75085080b63..e5bb96b10f1 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -43,6 +43,10 @@ config EARLY_PRINTK
with klogd/syslogd or the X server. You should normally N here,
unless you want to debug such a crash.
+config EARLY_PRINTK_MRST
+ bool "Early printk for MRST platform support"
+ depends on EARLY_PRINTK && X86_MRST
+
config EARLY_PRINTK_DBGP
bool "Early printk via EHCI debug port"
depends on EARLY_PRINTK && PCI