Hi there folks, My boss asked me to evaluate the process of tailoring a yocto-based Linux distribution to support this iMX6 board: https://www.embedded-world.de/en/ausstellerprodukte/embwld15/product-1537794/bf8a1/ we're using in a commercial project for an important customer.
At first, I figured I could just get away with it just by using a standard supported configuration and then proceed the extra mile from there tweaking and fixing as necessary creating extra layers and so forth... but it turned out it's waaaay harder than that! I've already spent a couple of days on this thing and I could not achieve the board to boot properly into Linux. At first I tried building for imx6qsabresd: $ repo init -u https://github.com/Freescale/fsl-community-bsp-platform -b fido && repo sync $ source ./setup-environment build $ bitbake core-image-minimal .... crunch crunch crunch.... 1. Tried to write the sdcard image but it doesn't even start u-boot (no serial output on any port) $ sudo dd if=core-image-minimal-imx6qsabresd-20150429122640.rootfs.sdcard of=/dev/sdb bs=1M conv=fsync 2. Tried to bot into u-boot.imx alone. Again, nothing. (no serial output) $ sudo dd if=u-boot.imx of=/dev/sdb seek=2 conv=fsync 3. Tried to boot into very-old-but-working vendor-provided u-boot load kernel uImage and DTB from there and boot. Didn't work either, however I read that older U-boot versions did not support DTB files so it is not clear to me how to bundle together the kernel and the DTB into a uImage. Of course it would be much better to be able the yocto version of u-boot instead. Moreover, would a generic dtb work for a different piece of hardware anyways?? I am totally stuck here folks and I would really appreciate some help on this. Sorry if this looks like a noob question. It definitely is :-( Thanks. U-Boot 2009.08-dirty (Feb 03 2015 - 10:50:48) CPU: Freescale i.MX6 family TO1.5 at 792 MHz Thermal sensor with ratio = 183 Temperature: 39 C, calibration data 0x5844eb69 mx6q pll1: 792MHz mx6q pll2: 528MHz mx6q pll3: 480MHz mx6q pll8: 50MHz ipg clock : 66000000Hz ipg per clock : 66000000Hz uart clock : 80000000Hz cspi clock : 60000000Hz ahb clock : 132000000Hz axi clock : 264000000Hz emi_slow clock: 132000000Hz ddr clock : 528000000Hz usdhc1 clock : 198000000Hz usdhc2 clock : 198000000Hz usdhc3 clock : 198000000Hz usdhc4 clock : 198000000Hz nfc clock : 24000000Hz Board: i.MX6Q-SABRESD: unknown-board Board: 0x63015 [POR ] Boot Device: SD I2C: ready DRAM: 2 GB MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3 *** Warning - bad CRC or MMC, using default environment In: serial Out: serial Err: serial Found PFUZE100! deviceid=10,revid=21 Net: got MAC address from IIM: 00:00:00:00:00:00 FEC0 [PRIME] Hit any key to stop autoboot: 0 MX6Q SABRESD U-Boot > printenv bootdelay=3 baudrate=115200 ipaddr=192.168.1.103 serverip=192.168.1.101 netmask=255.255.255.0 loadaddr=0x10800000 rd_loadaddr=(0x1300000) netdev=eth0 ethprime=FEC0 uboot=u-boot.bin kernel=uImage nfsroot=/opt/eldk/arm bootargs_base=setenv bootargs console=ttymxc2,115200 bootargs_nfs=setenv bootargs ${bootargs} root=/dev/nfs ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp bootcmd_net=run bootargs_base bootargs_nfs; tftpboot ${loadaddr} ${kernel}; bootm bootargs_mmc=setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb1:dev=ldb,LDB-XGA,if=RGB666 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 bootcmd_mmc=run bootargs_base bootargs_mmc; mmc dev 0; mmc read ${loadaddr} 0x800 0x2000; bootm bootcmd=run bootcmd_mmc stdin=serial stdout=serial stderr=serial ethact=FEC0 Environment size: 784/8188 bytes MX6Q SABRESD U-Boot > I've created a FAT partition, put uImage and a DTB file there, loaded into 2009 U-Boot Ok but it won't boot. It gets stuck just after verifying the uImage checksum. Thought this could be related to the missing/wrong DTB. Addendum: tried a few more MACHINES (imx6dlsabresd, imx6qsabrelite, imx6qsabresd, nitrogen6x). Still no pie :-( -- _______________________________________________ meta-freescale mailing list [email protected] https://lists.yoctoproject.org/listinfo/meta-freescale
