[PATCH v3 04/29] doc: ls1046ardb: Document debug uart

[Sean Anderson]

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

Signed-off-by: Sean Anderson <sean.anderson at seco.com>
---

(no changes since v2)

Changes in v2:
- New

 doc/board/nxp/ls1046ardb.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/doc/board/nxp/ls1046ardb.rst b/doc/board/nxp/ls1046ardb.rst
index c73516c070..e4499a13fb 100644
--- a/doc/board/nxp/ls1046ardb.rst
+++ b/doc/board/nxp/ls1046ardb.rst
@@ -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
-- 
2.25.1