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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-07-24 17:29:40 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-26 16:18:41 +0200 |
| commit | 5c05917e7fe313a187ad6ebb94c1c6cf42862a0b (patch) | |
| tree | 0b8b59cdfb31016873ad8980d3381c1e5e2200d1 /Documentation | |
| parent | 0af36739af81f152cc24a0fdfa0754ef657afe3d (diff) | |
| download | op-kernel-dev-5c05917e7fe313a187ad6ebb94c1c6cf42862a0b.zip op-kernel-dev-5c05917e7fe313a187ad6ebb94c1c6cf42862a0b.tar.gz | |
x86: usb debug port early console, v4
based on work from Eric, and add some timeout so don't dead loop when debug
device is not installed
v2: fix checkpatch warning
v3: move ehci struct def to linux/usrb/ehci_def.h from host/ehci.h
also add CONFIG_EARLY_PRINTK_DBGP to disable it by default
v4: address comments from Ingo, seperate ehci reg def moving to another patch
also add auto detect port that connect to debug device for Nvidia
southbridge
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: "Arjan van de Ven" <arjan@infradead.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Greg KH" <greg@kroah.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index e7bea3e..92ddd4a 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -657,11 +657,12 @@ and is between 256 and 4096 characters. It is defined in the file earlyprintk= [X86-32,X86-64,SH,BLACKFIN] earlyprintk=vga earlyprintk=serial[,ttySn[,baudrate]] + earlyprintk=dbgp Append ",keep" to not disable it when the real console takes over. - Only vga or serial at a time, not both. + Only vga or serial or usb debug port at a time. Currently only ttyS0 and ttyS1 are supported. |
