doc: board: phytec: phycore-am6: Describe UART based boot

Describe how to boot via UART.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>

diff --git a/doc/board/phytec/phycore-am62x.rst b/doc/board/phytec/phycore-am62x.rst
index ce7ec5545a6fec3bb5cf3511117dabd1f646e4b7..a7ce2c58825b120296d07c5a501f97af206f47f0 100644 (file)
--- a/doc/board/phytec/phycore-am62x.rst
+++ b/doc/board/phytec/phycore-am62x.rst
@@ -118,6 +118,23 @@ tiboot3.bin, tispl.bin and u-boot.img are stored on the uSD card.
   fatload mmc 1 ${loadaddr} u-boot.img
   mtd write ospi.u-boot ${loadaddr} 0 ${filesize}
 
+UART based boot
+---------------
+
+To boot the board via UART, set the switches to UART mode and connect to the
+micro USB port labeled as "Debug UART". After power-on the build artifacts
+needs to be uploaded one by one with a tool like sz.
+
+Example bash script sequence for running on a Linux host PC feeding all boot
+artifacts needed to the device. Assuming the host uses /dev/ttyUSB0 as
+the main domain serial port:
+
+.. prompt:: bash $
+
+  stty -F /dev/ttyUSB0 115200
+  sb --xmodem tiboot3.bin > /dev/ttyUSB0 < /dev/ttyUSB0
+  sb --ymodem tispl.bin > /dev/ttyUSB0 < /dev/ttyUSB0
+  sb --ymodem u-boot.img > /dev/ttyUSB0 < /dev/ttyUSB0
 
 Boot Modes
 ----------

diff --git a/doc/board/phytec/phycore-am64x.rst b/doc/board/phytec/phycore-am64x.rst
index 2b9cd32c508a0e42450cface599a44246dd872e0..68d78ad7c25a5ca3b250f11ec62b5a79273aeab1 100644 (file)
--- a/doc/board/phytec/phycore-am64x.rst
+++ b/doc/board/phytec/phycore-am64x.rst
@@ -119,6 +119,25 @@ tiboot3.bin, tispl.bin and u-boot.img are stored on the uSD card.
   fatload mmc 1 ${loadaddr} u-boot.img
   mtd write ospi.u-boot ${loadaddr} 0 ${filesize}
 
+UART based boot
+---------------
+
+To boot the board via UART, set the switches to UART mode and connect to the
+micro USB port labeled as "Debug UART". After power-on the build artifacts
+needs to be uploaded one by one with a tool like sz.
+
+Example bash script sequence for running on a Linux host PC feeding all boot
+artifacts needed to the device. Assuming the host uses /dev/ttyUSB0 as
+the main domain serial port:
+
+.. prompt:: bash $
+
+  stty -F /dev/ttyUSB0 115200
+  sb --xmodem tiboot3.bin > /dev/ttyUSB0 < /dev/ttyUSB0
+  # Resend tiboot3.bin a 2nd time due to ErrataID:i2331
+  sb --xmodem tiboot3.bin > /dev/ttyUSB0 < /dev/ttyUSB0
+  sb --ymodem tispl.bin > /dev/ttyUSB0 < /dev/ttyUSB0
+  sb --ymodem u-boot.img > /dev/ttyUSB0 < /dev/ttyUSB0
 
 Boot Modes
 ----------