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doc: ls1046ardb: Document debug uart 

This adds some instructions for enabling the debug uart, including the
correct address and clock rate.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
This commit is contained in:
Sean Anderson 2022-03-22 16:59:12 -04:00 committed by Tom Rini
parent b5ec417b56
commit e5e982c69b
1 changed files with 9 additions and 0 deletions
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doc/board/nxp/ls1046ardb.rst
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@ -109,3 +109,12 @@ SD boot and eMMC boot
``{ SW5[0:8], SW4[0] }`` should be ``0010_0000_0``. eMMC is selected only if
there is no SD card in the slot.
Debug UART
----------
To enable the debug UART, enable the following config options::
CONFIG_DEBUG_UART_NS16550=y
CONFIG_DEBUG_UART_BASE=0x21c0500
CONFIG_DEBUG_UART_CLOCK=300000000