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| author |   Paul Walmsley <paul.walmsley@sifive.com> | 2019-10-09 12:53:50 -0700 |
|---|---|---|
| committer |   Jonathan Corbet <corbet@lwn.net> | 2019-10-10 11:23:21 -0600 |
| commit | 7f70ae564b807f81263326d641514c6dca88e5ef (patch) | |
| tree | 4195626310b0e749f8139b1a8d4ec162383b6e02 | |
| parent | docs: remove :c:func: from genalloc.rst (diff) | |
| download | linux-dev-7f70ae564b807f81263326d641514c6dca88e5ef.tar.xz linux-dev-7f70ae564b807f81263326d641514c6dca88e5ef.zip | |
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 <paul.walmsley@sifive.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Andreas Schwab <schwab@suse.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 4 |
1 files changed, 4 insertions, 0 deletions
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,<addr>[,options] Start an early, polled-mode console on a Cadence (xuartps) serial port at the specified address. Only |