Latest revision as of 22:24, 11 December 2024

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VAR-SOM-AM62 - Debian Customize from source code

Introduction

This guide demonstrates how to patch and rebuild the VAR-SOM-AM62 U-Boot images.

To learn how to build the U-Boot images outside of Debian, see: Build U-Boot from source code

Add your patches on top of the Variscite source code

Fetch the U-Boot source:

$ mkdir -p ~/am62_debian_uboot && cd ~/am62_debian_uboot
$ git clone https://github.com/varigit/ti-u-boot -b ti-u-boot-2023.04_09.02.01.10_var01
$ cd ti-u-boot
$ git clean -fdx

Next, make the desired changes to the U-Boot source code. After changing the source code, create a diff file:

$ vim board/variscite/am62x_var_som/am62x_var_som.c
$ vim include/configs/am62x_var_som.h

edit and save

$ git diff > ~/am62_debian_uboot/ti-u-boot/uboot.diff

Refer to the instructions on how to download the Debian source code and apply the U-Boot patch during the Debian image build process. After cloning the Debian source code, it will be located in the ~/debian_am62x_var_som/ti-bdebstrap/".

Create the directory ~/debian_am62x_var_som/ti-bdebstrap/patches/ti-u-boot and copy the uboot.diff patch.

$ mkdir -p ~/debian_am62x_var_som/ti-bdebstrap/patches/ti-u-boot
$ cp ~/am62_debian_uboot/ti-u-boot/uboot.diff  ~/debian_am62x_var_som/ti-bdebstrap/patches/ti-u-boot

Refer to Build and flash the Debian image with uboot changes.

Use your remote repository on GitHub

Create a GitHub account and upload your proprietary U-Boot to a new repository: You can fork our repository to your account by visiting the following link and clicking on "Fork" at the top right of the screen: https://github.com/varigit/ti-u-boot/tree/ti-u-boot-2023.04_09.02.01.10_var01

Alternatively, you can clone the repository to your local machine, and push it later to your account.

Refer to How to Download Debian Source Code. After downloading the source, open the file ~/debian_am62x_var_som/ti-bdebstrap/configs/bsp_sources.toml and locate the tag 09.02.01.10_var01.

   atf_srcrev = "00f1ec6b8740ccd403e641131e294aabacf2a48b"
   optee_srcrev = "012cdca49db398693903e05c42a254a3a0c0d8f2"
   uboot_srcuri = "https://github.com/varigit/ti-u-boot.git"  #change to your repository name of uboot
   uboot_srcrev = "80ceb4d91326e00edd22a3fabf5dd2d64f6a7635"  #update the hash with the latest commit
   linux_fw_srcrev = "09.02.00.010"

Finally refer to Build the Debian image with updated u-boot repository.

@@ Line 9: / Line 9: @@
 = Introduction =
-This guide demonstrates how to patch and rebuild the VAR-SOM-AM62 U-Boot images using Yocto.
+This guide demonstrates how to patch and rebuild the VAR-SOM-AM62 U-Boot images.
-To learn how to build the U-Boot images outside of Yocto, see: {{Varlink|Debian_Build_U-Boot_TI|{{#var:RELEASE_LINK}}|'''Build U-Boot from source code'''}}
+To learn how to build the U-Boot images outside of Debian, see: {{Varlink|Debian_Build_U-Boot_TI|{{#var:RELEASE_LINK}}|'''Build U-Boot from source code'''}}
-= Before Starting =
-Before starting this guide, you must have the Yocto environment set and be able to build images for the VAR-SOM-AM62.
-Please see: {{Varlink|Yocto_Build_Release|{{#var:RELEASE_LINK}}|'''Build Yocto from source code'''}}.
-The remainder of the guide assumes the Yocto working directory is '''~/var-ti-yocto'''
-= Making changes in the source code =
-Choose one of the following three methods to customize the U-Boot source code and build it using Yocto:
 == Add your patches on top of the Variscite source code ==
 Fetch the U-Boot source:
-  $ MACHINE={{#var:MACHINE_NAME}} bitbake -c unpack virtual/bootloader
+  $ mkdir -p {{#var:BUILD_FOLDER_UBOOT}} && cd {{#var:BUILD_FOLDER_UBOOT}}
- $ mkdir -p ../local_repos/{{#var:U-BOOT_REPO}}
+  $ git clone https://github.com/varigit/{{#var:U-BOOT}} -b {{#var:U-BOOT_BRANCH}}
-  $ cp -a arago-tmp-default-glibc/work/{{#var:MACHINE_NAME_}}-oe-linux/u-boot-variscite/<uboot version>/git/. ../local_repos/{{#var:U-BOOT_REPO}}
+  $ cd {{#var:U-BOOT}}
-  $ cd ../local_repos/{{#var:U-BOOT_REPO}}
- $ git reset --hard
   $ git clean -fdx
 Next, make the desired changes to the U-Boot source code. After changing the source code, create a diff file:
- $ cd ~/var-ti-yocto/local_repos/ti-u-boot
   $ vim board/variscite/am62x_var_som/am62x_var_som.c
   $ vim include/configs/am62x_var_som.h
 edit and save
-  $ git diff > ~/var-ti-yocto/tisdk/sources/meta-variscite-bsp-ti/recipes-bsp/u-boot/u-boot-variscite/uboot.diff
+  $ git diff > {{#var:BUILD_FOLDER_UBOOT}}/{{#var:U-BOOT}}/uboot.diff
-Please refer {{Varlink|Debian_Build_Release_TI|{{#var:RELEASE_LINK}}#Deploy_source|'''How to Download Debian Source Code'''}} and to apply the above created U-Boot patch when building the Debian image.
-After cloned the debian source code , the code will be located under '''{{#var:BUILD_FOLDER}}/ti-bdebstrap/'''.
+Refer to the instructions on how to download the Debian source code and apply the U-Boot patch during the Debian image build process. After cloning the Debian source code, it will be located in the '''{{#var:BUILD_FOLDER}}/ti-bdebstrap/'''".
-Create the directory  '''{{#var:BUILD_FOLDER}}/ti-bdebstrap/patches/ti-u-boot''' and copy the uboot.diff patch.
+Create the directory  '''{{#var:BUILD_FOLDER}}/ti-bdebstrap/patches/ti-u-boot''' and copy the '''uboot.diff''' patch.
+ $ mkdir -p {{#var:BUILD_FOLDER}}/ti-bdebstrap/patches/ti-u-boot
+ $ cp {{#var:BUILD_FOLDER_UBOOT}}/{{#var:U-BOOT}}/uboot.diff  {{#var:BUILD_FOLDER}}/ti-bdebstrap/patches/ti-u-boot
- $ cp ~/var-ti-yocto/tisdk/sources/meta-variscite-bsp-ti/recipes-bsp/u-boot/u-boot-variscite/uboot.diff  {{#var:BUILD_FOLDER}}/ti-bdebstrap/patches/ti-u-boot
+Refer to {{Varlink|Debian_Build_Release_TI|{{#var:RELEASE_LINK}}#Building_the_Debian_image|'''Build and flash the Debian image with uboot changes'''}}.
 == Use your remote repository on GitHub ==
-Using this method Yocto will fetch the source code from your remote repository on GitHub.<br>
 Create a GitHub account and upload your proprietary U-Boot to a new repository:
 You can fork our repository to your account by visiting the following link and clicking on "Fork" at the top right of the screen:
@@ Line 58: / Line 42: @@
 Alternatively, you can clone the repository to your local machine, and push it later to your account.<br>
-<br>
+Refer to {{Varlink|Debian_Build_Release_TI|{{#var:RELEASE_LINK}}#Deploy_source|'''How to Download Debian Source Code'''}}. After downloading the source, open the file '''{{#var:BUILD_FOLDER}}/ti-bdebstrap/configs/bsp_sources.toml''' and locate the tag '''{{#var:TI_RELEASE}}_var01'''.
-Update the recipes to use your remote repository instead of the default one:
- $ cd {{#var:BUILD_FOLDER}}/sources/{{#var:META_VARISCITE_REPO}}/recipes-bsp/u-boot/
-Create a u-boot-variscite.bbappend file:
- $ vim u-boot-variscite_%.bbappend
-and append the following lines to it (see the previous section for listing the commits or getting the latest commit ID):
- UBOOT_SRC = <nowiki>"git://github.com/<your_account>/</nowiki>{{#var:U-BOOT_REPO}}.git;protocol=git"
- SRCBRANCH = "{{#var:U-BOOT_BRANCH}}" ''(or your own created branch)''
- SRCREV = "''The commit id you'd like to use''"
-{{#ifexpr:{{#var:YOCTO_VERSION}}<3.1|
-Also, update the u-boot-fw-utils recipe:
- $ cp u-boot-variscite.bbappend u-boot-fw-utils.bbappend
-|}}
-{{note|For the SRCREV value you can also use "${AUTOREV}" during development to get the latest commit of the branch<br>
-(If you do so, make sure to run "{{#var:BB_ENV}} bitbake -c cleansstate virtual/bootloader" before rebuilding U-Boot)}}
-= Building U-Boot using Yocto =
-After making the desired changes to the source code following one of the methods described in the [[#Making changes in the source code|Making changes in the source code]], you can build the U-Boot images by running:
- $ cd ~/var-ti-yocto/tisdk/build
- $ . conf/setenv
- # Build only the U-Boot images:
- $ MACHINE=am62x-var-som bitbake -c deploy u-boot-variscite                    # tispl.bin and u-boot.img
- $ MACHINE=am62x-var-som bitbake -c deploy mc:k3r5:u-boot-variscite            # tiboot3.bin
- # Optionally, you may skip building U-Boot and just build your image:
- $ MACHINE=am62x-var-som bitbake <image name>
-The relevant output files are:
- deploy-ti/images/am62x-var-som/u-boot.img
+    atf_srcrev = "00f1ec6b8740ccd403e641131e294aabacf2a48b"
-  deploy-ti/images/am62x-var-som/tispl.bin
+    optee_srcrev = "012cdca49db398693903e05c42a254a3a0c0d8f2"
- deploy-ti/images/am62x-var-som/tiboot3.bin
+    uboot_srcuri = "https://github.com/varigit/ti-u-boot.git"  #change to your repository name of uboot
+    uboot_srcrev = "80ceb4d91326e00edd22a3fabf5dd2d64f6a7635"  #update the hash with the latest commit
+    linux_fw_srcrev = "09.02.00.010"
-see: {{Varlink|Yocto_Build_U-Boot_TI|{{#var:RELEASE_LINK}}#Update_U-Boot_on_running_system|'''Build U-Boot from source code'''}} to learn how to update a running board with these images.
+Finally refer to {{Varlink|Debian_Build_Release_TI|{{#var:RELEASE_LINK}}#Building_the_Debian_image|'''Build the Debian image with updated u-boot repository'''}}.

Debian Customizing U-Boot AM62: Difference between revisions

Latest revision as of 22:24, 11 December 2024

Contents

Introduction

Add your patches on top of the Variscite source code

Use your remote repository on GitHub