2015-06-10 17:21:37

by Alexander Kuleshov

Subject: [PATCH] Documentation/kernel-parameters: add missing pciserial to the earlyprintk

The PCI based UART can be specified for earlyprintk with the 'pciserial'
parameter from the ea9e9d802. This patch adds missing information about
this parameter.

Signed-off-by: Alexander Kuleshov <[email protected]>
---
Documentation/kernel-parameters.txt | 1 +
1 file changed, 1 insertion(+)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 61ab162..7d27e64 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1009,6 +1009,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
earlyprintk=serial[,0x...[,baudrate]]
earlyprintk=ttySn[,baudrate]
earlyprintk=dbgp[debugController#]
+ earlyprintk=pciserial,bus:device.function[,baudrate]

earlyprintk is useful when the kernel crashes before
the normal console is initialized. It is not enabled by
--
2.4.0.GIT

2015-06-22 16:03:13

by Jonathan Corbet

Subject: Re: [PATCH] Documentation/kernel-parameters: add missing pciserial to the earlyprintk

On Wed, 10 Jun 2015 23:21:15 +0600
Alexander Kuleshov <[email protected]> wrote:

> The PCI based UART can be specified for earlyprintk with the 'pciserial'
> parameter from the ea9e9d802. This patch adds missing information about
> this parameter.

So I went ahead and applied this to the docs tree since it's better than
what was there before. But is there any chance I could prevail upon you
to add a bit of descriptive text saying what the pciserial option
actually does and how to use it?

Thanks,

jon