From 7f70ae564b807f81263326d641514c6dca88e5ef Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Wed, 9 Oct 2019 12:53:50 -0700 Subject: Documentation: admin-guide: add earlycon documentation for RISC-V Kernels booting on RISC-V can specify "earlycon" with no options on the Linux command line, and the generic DT earlycon support will query the "chosen/stdout-path" property (if present) to determine which early console device to use. Document this appropriately in the admin-guide. Signed-off-by: Paul Walmsley Reviewed-by: Geert Uytterhoeven Cc: Christoph Hellwig Cc: Andreas Schwab Signed-off-by: Jonathan Corbet --- Documentation/admin-guide/kernel-parameters.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation') diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index edf65dad250b..fd69e7f8ef79 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -988,6 +988,10 @@ chosen node or the ACPI SPCR table if supported by the platform. + [RISCV] When used with no options, the early + console is determined by the stdout-path + property in the device tree's chosen node. + cdns,[,options] Start an early, polled-mode console on a Cadence (xuartps) serial port at the specified address. Only -- cgit