[PATCH 1/1] doc: riscv: Update documentation for Sipeed MAIX boards

[Heinrich Schuchardt]

The MAIXDUINO runs fine with the sipeed_maix_bitm_defconfig but a different
board id parameter should be passed to kflash.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 doc/board/sipeed/maix.rst | 38 +++++++++++++++++++++++++++++---------
 1 file changed, 29 insertions(+), 9 deletions(-)

diff --git a/doc/board/sipeed/maix.rst b/doc/board/sipeed/maix.rst
index 06e0008b9f..120fd8e3ba 100644
--- a/doc/board/sipeed/maix.rst
+++ b/doc/board/sipeed/maix.rst
@@ -1,8 +1,8 @@
 .. SPDX-License-Identifier: GPL-2.0+
 .. Copyright (C) 2020 Sean Anderson <seanga2 at gmail.com>

-Maix Bit
-========
+MAIX
+====

 Several of the Sipeed Maix series of boards cotain the Kendryte K210 processor,
 a 64-bit RISC-V CPU. This processor contains several peripherals to accelerate
@@ -13,8 +13,10 @@ peripherals include 8M of SRAM (accessible with and without caching); remappable
 pins, including 40 GPIOs; AES, FFT, and SHA256 accelerators; a DMA controller;
 and I2C, I2S, and SPI controllers. Maix peripherals vary, but include spi flash;
 on-board usb-serial bridges; ports for cameras, displays, and sd cards; and
-ESP32 chips. Currently, only the Sipeed Maix Bit V2.0 (bitm) is supported, but
-the boards are fairly similar.
+ESP32 chips.
+
+Currently, only the Sipeed MAIX BiT V2.0 (bitm) and Sipeed MAIXDUINO are
+supported, but the boards are fairly similar.

 Documentation for Maix boards is available from
 `Sipeed's website <http://dl.sipeed.com/MAIX/HDK/>`_.
@@ -26,20 +28,38 @@ details are rather lacking, so most technical reference has been taken from the
 Build and boot steps
 --------------------

-To build u-boot, run
+To build U-Boot, run

 .. code-block:: none

-    make sipeed_maix_bitm_defconfig
+    make <defconfig>
     make CROSS_COMPILE=<your cross compile prefix>

-To flash u-boot to a maix bit, run
+To flash U-Boot, run

 .. code-block:: none

-    kflash -tp /dev/<your tty here> -B bit_mic u-boot-dtb.bin
+    kflash -tp /dev/<your tty here> -B <board_id> u-boot-dtb.bin
+
+The board provides two serial devices. e.g.
+
+* /dev/serial/by-id/usb-Kongou_Hikari_Sipeed-Debug_12345678AB-if00-port0
+* /dev/serial/by-id/usb-Kongou_Hikari_Sipeed-Debug_12345678AB-if01-port0
+
+Which one is used for flashing depends on the board.
+
+======================== ========================== ========== ==========
+Board                    defconfig                  board_id   TTY device
+======================== ========================== ========== ==========
+Sipeed MAIX BiT                                     bit        first
+Sipeed MAIX BiT with Mic sipeed_maix_bitm_defconfig bit_mic    first
+Sipeed MAIXDUINO         sipeed_maix_bitm_defconfig maixduino  first
+Sipeed MAIX GO                                      goE        second
+Sipeed MAIX ONE DOCK                                goD        first
+======================== ========================== ========== ==========

-Boot output should look like the following:
+Flashing causes a reboot of the device. Parameter -t specifies that a console
+shall be opened immediately. Boot output should look like the following:

 .. code-block:: none

--
2.27.0