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

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Message-Id: <febc920964f2f0919d21775132e84c5cc270177e.1697708489.git.geert+renesas@glider.be>
Date:   Thu, 19 Oct 2023 11:46:44 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Jonathan Corbet <corbet@....net>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Magnus Damm <magnus.damm@...il.com>
Cc:     linux-doc@...r.kernel.org, linux-sh@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH 2/2] Documentation: kernel-parameters: Add earlyprintk=bios on SH

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@...der.be>
---
 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