board: starfive: Add initial Milk-V Mars CM and Mars CM Lite user documentation

Add initial board docs for Milk-V Mars CM (eMMC) and Milk-V Mars CM Lite
(SD Card) to the visionfive2 board target.

Signed-off-by: E Shattow <e@freeshell.de>

diff --git a/doc/board/starfive/index.rst b/doc/board/starfive/index.rst
index 66abc6f..f85d737 100644 (file)
--- a/doc/board/starfive/index.rst
+++ b/doc/board/starfive/index.rst
@@ -8,5 +8,7 @@ StarFive
 
    deepcomputing_fml13v01
    milk-v_mars
+   milkv_marscm_emmc
+   milkv_marscm_lite
    pine64_star64
    visionfive2

diff --git a/doc/board/starfive/milkv_marscm_emmc.rst b/doc/board/starfive/milkv_marscm_emmc.rst
new file mode 100644 (file)
index 0000000..6956d37
--- /dev/null
+++ b/doc/board/starfive/milkv_marscm_emmc.rst
@@ -0,0 +1,24 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Milk-V Mars CM (eMMC)
+=====================
+
+U-Boot for the Mars CM uses the same U-Boot binaries as the VisionFive 2 board.
+Devicetree selection is made in U-Boot SPL at runtime, dependent on the content
+of EEPROM.
+
+Device-tree selection
+---------------------
+
+U-Boot will set variable $fdtfile to starfive/jh7110-milkv-marscm-emmc.dtb
+dependent on the content of EEPROM.
+
+To overrule this selection the variable can be set manually and saved in the
+environment
+
+::
+
+    env set fdtfile my_device-tree.dtb
+    env save
+
+.. include:: jh7110_common.rst

diff --git a/doc/board/starfive/milkv_marscm_lite.rst b/doc/board/starfive/milkv_marscm_lite.rst
new file mode 100644 (file)
index 0000000..bea96da
--- /dev/null
+++ b/doc/board/starfive/milkv_marscm_lite.rst
@@ -0,0 +1,24 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Mars CM Lite (SD Card)
+======================
+
+U-Boot for the Mars CM Lite uses the same U-Boot binaries as the VisionFive 2
+board. Devicetree selection is made in U-Boot SPL at runtime, dependent on the
+content of EEPROM.
+
+Device-tree selection
+---------------------
+
+U-Boot will set variable $fdtfile to starfive/jh7110-milkv-marscm-lite.dtb
+dependent on the content of EEPROM.
+
+To overrule this selection the variable can be set manually and saved in the
+environment
+
+::
+
+    env set fdtfile my_device-tree.dtb
+    env save
+
+.. include:: jh7110_common.rst