Adds support for BeagleY-AI board by introducing the
beagley_ai_defconfig file and related support files.
The BeagleY-AI uses the TI J722S SoC, also known as AM67A, also
known as TDA4VEN or TDA4AEN.
Retrieve BSP settings from meta-ti (may be useful for other TI boards):
- Set BR2_TARGET_ARM_TRUSTED_FIRMWARE_TARGET_BOARD = "lite"
meta-ti-bsp/conf/machine/include/j722s.inc:TFA_BOARD = "lite"
- Set BR2_TARGET_UBOOT_NEEDS_ATF_BL31 to provide BL31 variable pointing
to ATF bl31.bin to the U-Boot build process [1].
- Set BR2_TARGET_ARM_TRUSTED_FIRMWARE_BL32_OPTEE to OP-TEE as BL32
secure payload. meta-ti set "SPD=opteed" to build ATF [2].
- Set BR2_TARGET_OPTEE_OS_PLATFORM to "k3-am62x".
meta-ti uses the OPTEEMACHINE to set optee-os platform [3].
meta-ti]$ git grep OPTEEMACHINE
meta-ti-bsp/conf/machine/include/j722s.inc:OPTEEMACHINE = "k3-am62x"
- Use am67a_beagley_ai_a53 and am67a_beagley_ai_r5 u-boot
defconfigs introduced in u-boot v2025.07 [4]
- u-boot distroboot (bootflow) detect extlinux.conf file from the first
SDcard partition, so we have to install the kernel and its dtb file.
Use devicetreedir instead of devicetree in extlinux.conf file to
avoid hardcoding the devicetree file name. TI boards are able to
retrieve dtb file name from an EEPROM (see TI_I2C_BOARD_DETECT in
uboot).
- Use 6.15.6 stable release instead of the latest 6.12 LTS since the
k3-j722s support was only introduced in 6.11 kernels.
- Provide a hash file for all custom package version
(arm-trusted-firmware, linux, ti-k3-r5-loader, uboot) to enable
BR2_DOWNLOAD_FORCE_CHECK_HASHES.
[1] https://git.yoctoproject.org/meta-ti/commit/?id=e74b9a1746d4d04757c87c1920a0f743e55ff096
[2] https://git.yoctoproject.org/meta-ti/tree/meta-ti-bsp/recipes-bsp/trusted-firmware-a/trusted-firmware-a-ti.inc?h=09.02.00.004#n7
[3] https://git.yoctoproject.org/meta-arm/tree/meta-arm/recipes-security/optee/optee-os.inc?h=4.0.3#n23
[4] b27c94958b
More information about the board can be found at:
https://www.beagleboard.org/boards/beagley-ai
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>
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