Hi all, I am trying to use a BB-BONE-LCD5-01-00A1.dts to customise the kernel device tree. Unfortunately, despite setting the overlay_files variable in uEnv.txt, the generated BB-BONE-LCD5-01-00A1.dtb on the boot folder of the MMC seems to have no effect.
I am using: * meta-ti: branch zeus, commit 1dd4558 (with a fixed .wks see https://lists.yoctoproject. org/g/meta-ti/message/12916) ( https://lists.yoctoproject.org/g/meta-ti/message/12916) ). I will probably switch to tag ti2020.00 or previous if needed * poky: branch zeus, commit ca9cc50 * meta-openembedded: branch zeus, commit 44e458f Notes * BB-BONE-LCD5-01-00A1.dtb has been generated by a linux-ti-%.bbappend ... KERNEL_DEVICETREE_append = " BB-BONE-LCD5-01-00A1.dtb" SRC_URI_append = " file://BB-BONE-LCD5-01-00A1.dts" do_configure_prepend () { cp ${WORKDIR}/*.dts ${WORKDIR}/git/arch/arm/boot/dts } * as far as I can understand the same file could have been generated using the devicetree.bbclass (See device-tree.bb ( https://github.com/nathanrossi/gps-clock-project/blob/wip-devicetree-classify/meta-gps-clock/recipes/device-tree/device-tree.bb ) and openembedded-core msg ( https://www.mail-archive.com/[email protected]/msg113152.html ) ). Unfortunately in this case the dtb is placed in boot/devicetree inside the generated image and I am not sure if this location is compatible with the u-boot version I am using Doubts: * taking a look to the u-boot tag ti2020.01.00 used by the meta-ti version I am using, I see that CONFIG_OF_LIBFDT_OVERLAY is not set for am335x. Therefore I suppose that the variable overlay_files set in uEnv.txt would have no effect for am335X SOC, is it correct? * If the previous point is correct, which is the suggested approach to customise the device-tree with current u-boot? Any suggestion would be much appreciated. Regards Luca
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