[PATCH] Documentation: admin-guide: add earlycon documentation for the sifive serial driver

[Paul Walmsley]

Document earlycon usage for the SiFive serial port driver in the same
fashion as for the other serial port IP blocks, since the SiFive
serial port driver supports it.

Signed-off-by: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Reported-by: Andreas Schwab <schwab@xxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
---
 Documentation/admin-guide/kernel-parameters.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index c7ac2f3ac99f..90becb00221b 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1106,6 +1106,12 @@
 			address must be provided, and the serial port must
 			already be setup and configured.
 
+		sifive,<addr>
+			Start an early, polled-mode console on a SiFive
+			serial port at the specified address.  The port must
+			already be setup and configured.  Options are not
+			yet supported.
+
 	earlyprintk=	[X86,SH,ARM,M68k,S390]
 			earlyprintk=vga
 			earlyprintk=sclp
-- 
2.23.0