[PATCH 2/2] Documentation: kernel-parameters: Add earlyprintk=bios on SH

From: Geert Uytterhoeven
Date: Thu Oct 19 2023 - 05:47:00 EST


Document the use of the "earlyprintk=bios[,keep]" kernel parameter
option on SuperH systems with a SuperH standard BIOS.

Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Documentation/admin-guide/kernel-parameters.txt | 3 +++
1 file changed, 3 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 657bb0b54e2fc6cf..8e7f6be051a0e1d3 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1331,6 +1331,7 @@
earlyprintk=dbgp[debugController#]
earlyprintk=pciserial[,force],bus:device.function[,baudrate]
earlyprintk=xdbc[xhciController#]
+ earlyprintk=bios

earlyprintk is useful when the kernel crashes before
the normal console is initialized. It is not enabled by
@@ -1361,6 +1362,8 @@

The sclp output can only be used on s390.

+ The bios output can only be used on SuperH.
+
The optional "force" to "pciserial" enables use of a
PCI device even when its classcode is not of the
UART class.
--
2.34.1