bsh: update readme with instructions to build M2B

readme was missing instructions to build M2B. Now added.

Signed-off-by: Andrea Calabrese <[email protected]>
Reviewed-by: Tom Rini <[email protected]>

2 files changed, 86 insertions, 0 deletions

diff --git a/doc/board/bsh/imx6ulz_bsh_smm_m2.rst b/doc/board/bsh/imx6ulz_bsh_smm_m2.rst
new file mode 100644
index 00000000000..0f391a17ade
--- /dev/null
+++ b/doc/board/bsh/imx6ulz_bsh_smm_m2.rst
@@ -0,0 +1,85 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+How to Update U-Boot on imx6ulz_smm_m2 and imx6ulz_smm_m2b boards
+=================================================================
+
+Required software on the host PC:
+
+- UUU: https://github.com/NXPmicro/mfgtools
+
+Build U-Boot for m2:
+
+.. code-block:: bash
+
+   $ make mrproper
+   $ make imx6ulz_smm_m2_defconfig
+   $ make
+
+Build U-Boot for m2b:
+
+.. code-block:: bash
+
+   $ make mrproper
+   $ make imx6ulz_smm_m2b_defconfig
+   $ make
+
+This generates the SPL and u-boot-dtb.img binaries.
+
+Loading U-Boot via USB Serial Download Protocol
+-----------------------------------------------
+
+Copy SPL and u-boot-dtb.img to the uuu folder.
+
+Load the U-Boot via USB:
+
+.. code-block:: bash
+
+   $ sudo uuu -v -b nand_script.lst u-boot-with-spl.imx
+
+where nand_script.lst contains the following:
+
+.. code-block::
+
+   uuu_version 1.2.39
+
+   # @_flash.bin            | bootloader
+   # @_image   [_flash.bin] | image burn to nand, default is the same as bootloader
+
+   # This command will be run when i.MX6/7 i.MX8MM, i.MX8MQ
+   SDP: boot -f _flash.bin
+
+   # This command will be run when ROM support stream mode
+   # i.MX8QXP, i.MX8QM
+   SDPS: boot -f _flash.bin
+
+   # These commands will be run when use SPL and will be skipped if no spl
+   # SDPU will be deprecated. please use SDPV instead of SDPU
+   # {
+   SDPU: delay 1000
+   SDPU: write -f _flash.bin -offset 0x57c00
+   SDPU: jump
+   # }
+
+   # These commands will be run when use SPL and will be skipped if no spl
+   # if (SPL support SDPV)
+   # {
+   SDPV: delay 1000
+   SDPV: write -f _flash.bin -offset 0x11000
+   SDPV: jump
+   # }
+
+   FB: ucmd setenv fastboot_buffer ${loadaddr}
+   FB: download -f _image
+   FB: ucmd if test ! -n "$fastboot_bytes"; then setenv fastboot_bytes $filesize; else true; fi
+   # Burn image to nandfit partition if needed
+   FB: ucmd if env exists nandfit_part; then nand erase.part nandfit; nand write ${fastboot_buffer} nandfit ${fastboot_bytes}; else true; fi;
+   FB: ucmd nandbcb init ${fastboot_buffer} nandboot ${fastboot_bytes}
+   FB: Done
+
+Then U-Boot starts and its messages appear in the console program.
+
+Use the default environment variables:
+
+=> env default -f -a
+
+=> saveenv
diff --git a/doc/board/bsh/index.rst b/doc/board/bsh/index.rst
index 570ee4d72ed..e4f8b1f0b1c 100644
--- a/doc/board/bsh/index.rst
+++ b/doc/board/bsh/index.rst
@@ -7,3 +7,4 @@ BSH Hausgeraete GmbH
    :maxdepth: 2
 
    imx8mn_bsh_smm_s2
+   imx6ulz_bsh_smm_m2