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| author |   Scott Telford <stelford@cadence.com> | 2016-09-22 16:58:16 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-27 12:54:41 +0200 |
| commit | c41251b17563234371a9b376ed4914efa4bc079b (patch) | |
| tree | 7fa3e64e794043e6184232621af6a7272b46bacc /Documentation/kernel-parameters.txt | |
| parent | serial: xuartps: Removed unwanted checks while reading the error conditions (diff) | |
| download | linux-dev-c41251b17563234371a9b376ed4914efa4bc079b.tar.xz linux-dev-c41251b17563234371a9b376ed4914efa4bc079b.zip | |
serial: xuartps: Add some register initialisation to cdns_early_console_setup()
Add initialisation of control register and baud rate to
cdns_early_console_setup(), required when running kernel standalone
without a boot loader. Baud rate is only initialised when specified in
earlycon command-line option, otherwise it is assumed this has been
set by a boot loader. Updated Documentation/kernel-parameters.txt
accordingly.
Signed-off-by: Scott Telford <stelford@cadence.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index a4f4d693e2c1..70b51f824a60 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1045,11 +1045,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted. determined by the stdout-path property in device tree's chosen node. - cdns,<addr> - Start an early, polled-mode console on a cadence serial - port at the specified address. The cadence serial port - must already be setup and configured. Options are not - yet supported. + cdns,<addr>[,options] + Start an early, polled-mode console on a Cadence + (xuartps) serial port at the specified address. Only + supported option is baud rate. If baud rate is not + specified, the serial port must already be setup and + configured. uart[8250],io,<addr>[,options] uart[8250],mmio,<addr>[,options] |