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serial: fsl_lpuart: add earlycon support

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Add support for DT and command line based earlycon support for
lpuart and lpuart32 used on Freescale Vybrid and and QorIQ LS1021A
processors.

Signed-off-by: Stefan Agner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Stefan Agner 2015-10-17 00:45:55 -07:00 • committed by Greg Kroah-Hartman
commit 1d59b382f1
3 changed files with 47 additions and 0 deletions
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7
Documentation/kernel-parameters.txt
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@ -1023,6 +1023,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
serial port must already be setup and configured.
Options are not yet supported.
lpuart,<addr>
lpuart32,<addr>
Use early console provided by Freescale LP UART driver
found on Freescale Vybrid and QorIQ LS1021A processors.
A valid base address must be provided, and the serial
port must already be setup and configured.
earlyprintk= [X86,SH,BLACKFIN,ARM,M68k]
earlyprintk=vga
earlyprintk=efi