On Mon, Oct 9, 2017 at 5:41 PM, Stéphane Charette <[email protected]> wrote: > On Mon, Oct 9, 2017 at 12:39 PM, Stephane Charette > <[email protected]> wrote: >> >> In the past, I used to identify the type of device by reading the file >> /proc/device-tree/compatible. For example, see this: >> >> > hexdump -C /proc/device-tree/compatible >> 00000000 74 69 2c 61 6d 33 33 35 78 2d 62 6f 6e 65 2d 67 >> |ti,am335x-bone-g| >> 00000010 72 65 65 6e 00 74 69 2c 61 6d 33 33 35 78 2d 62 >> |reen.ti,am335x-b| >> 00000020 6f 6e 65 2d 62 6c 61 63 6b 00 74 69 2c 61 6d 33 >> |one-black.ti,am3| >> 00000030 33 35 78 2d 62 6f 6e 65 00 74 69 2c 61 6d 33 33 >> |35x-bone.ti,am33| >> 00000040 78 78 00 |xx. >> | >> >> Last night I upgraded to a new build. I installed this one: >> >> >> https://rcn-ee.com/rootfs/bb.org/testing/2017-10-08/stretch-iot/BBB-blank-debian-9.2-iot-armhf-2017-10-08-4gb.img.xz >> >> Now I see that same model no longer identifies itself as a BBG. it now >> thinks it is a BBB: >> >> > hexdump -C /proc/device-tree/compatible >> 00000000 74 69 2c 61 6d 33 33 35 78 2d 62 6f 6e 65 2d 62 >> |ti,am335x-bone-b| >> 00000010 6c 61 63 6b 00 74 69 2c 61 6d 33 33 35 78 2d 62 >> |lack.ti,am335x-b| >> 00000020 6f 6e 65 00 74 69 2c 61 6d 33 33 78 78 00 >> |one.ti,am33xx.| >> 0000002e >> > > > I should also have mentioned: I have not upgraded or installed new builds > since...early 2017? This is my first time back working with my beaglebones > in probably 8 months. So this change in behaviour may actually have been > quite a while ago.
Ugh, so it's not a bug, it's just the way the final *.dtb is generated with u-boot overlays: (we build up from one dtb..) So if we assume the BeagleBone Green = BeagleBone Black (minus) HDMI (audio/video)... BeagleBone Green: Board: BeagleBone Black <ethaddr> not set. Validating first E-fuse MAC BeagleBone Black: Model: SeeedStudio BeagleBone Green: uboot_overlays: [uboot_base_dtb=am335x-boneblack-uboot.dtb] ... uboot_overlays: Switching too: dtb=am335x-boneblack-uboot.dtb ... loading /boot/dtbs/4.9.53-ti-r67/am335x-boneblack-uboot.dtb ... 55752 bytes read in 170 ms (319.3 KiB/s) uboot_overlays: [fdt_buffer=0x60000] ... uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo ... 1105 bytes read in 871 ms (1000 Bytes/s) uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo ... 695 bytes read in 830 ms (0 Bytes/s) [ 0.000000] OF: fdt:Machine model: TI AM335x BeagleBone Black BeagleBone Black: Board: BeagleBone Black <ethaddr> not set. Validating first E-fuse MAC BeagleBone Black: Model: BeagleBoard.org BeagleBone Black: uboot_overlays: [uboot_base_dtb=am335x-boneblack-uboot.dtb] ... uboot_overlays: Switching too: dtb=am335x-boneblack-uboot.dtb ... loading /boot/dtbs/4.9.53-ti-r67/am335x-boneblack-uboot.dtb ... 55752 bytes read in 69 ms (789.1 KiB/s) uboot_overlays: [fdt_buffer=0x60000] ... uboot_overlays: loading /lib/firmware/OSD3358-00A0.dtbo ... 441 bytes read in 1234 ms (0 Bytes/s) uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo ... 1105 bytes read in 160 ms (5.9 KiB/s) uboot_overlays: loading /lib/firmware/BB-HDMI-TDA998x-00A0.dtbo ... 4169 bytes read in 877 ms (3.9 KiB/s) uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo ... 695 bytes read in 175 ms (2.9 KiB/s) [ 0.000000] OF: fdt:Machine model: TI AM335x BeagleBone Black So you can see how both boards start out as "am335x-boneblack-uboot.dtb" and we add, eMMC/HDMI/WL1835/ADC.. I guess we could patch in the model/compatble... BBBW: https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-BBBW-WL1835-00A0.dts#L32-L33 BBGW: https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-BBGW-WL1835-00A0.dts#L41-L42 Is it really worth it thou? ;) Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYirxiX-dzQ33Dg4_MkP_BWdMeNE1h%3DYR%2BPv375x%3DP2UcA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
