Hi folks,
I am trying to boot a custom kernel on a Wink Hub v1, which has an i.MX28 CPU, and is running U-Boot (U-Boot 2014.01-14400-gda781c6-dirty (Apr 30 2014 - 22:35:38)).
I have tried compiling my own modern kernel and putting it in place of the vendor (Linux version 2.6.35.3-flex-dvt) kernel on the flash chip, but when loading, I simply get the expected U-Boot loading messages, but then nothing at all from the serial port after that.
I'm trying to figure out where my problem is most likely to be. As far as I am aware from long-ago poking at U-Boot, the way that U-Boot passes arguments to the kernel has changed recently? Previously it was ATAGS, and now it expects a Device Tree Blob? Might this explain the failure to boot that I am seeing? And yes, I understand that given that
Many thanks!
Rogan P.S. I have also tried to boot the OpenWrt Duckbill kernel (a few years ago), with the same results ( https://forum.openwrt.org/t/porting-openwrt-to-winkhub-v1/56966):
U-Boot 2014.01-14400-gda781c6-dirty (Apr 30 2014 - 22:35:38)
CPU: Freescale i.MX28 rev1.2 at 454 MHz BOOT: NAND, 3V3 DRAM: 64 MiB NAND: 128 MiB In: serial Out: serial Err: serial Net: FEC0 [PRIME] Hit any key to stop autoboot: 0 => setenv bootargs 'noinitrd console=ttyS0,115200 rootfstype=ubifs ubi.mtd=5 root=ubi0:rootfs rw gpmi'; mtdparts default && ubi part database && ubifsmount ubi0:database && ubifsload ${loadaddr} openwrt-19.07.1-mxs-uImage 1799536 && bootm ${loadaddr} UBI: attaching mtd1 to ubi0 UBI: physical eraseblock size: 131072 bytes (128 KiB) UBI: logical eraseblock size: 126976 bytes UBI: smallest flash I/O unit: 2048 UBI: VID header offset: 2048 (aligned 2048) UBI: data offset: 4096 UBI: attached mtd1 to ubi0 UBI: MTD device name: "mtd=3" UBI: MTD device size: 8 MiB UBI: number of good PEBs: 64 UBI: number of bad PEBs: 0 UBI: max. allowed volumes: 128 UBI: wear-leveling threshold: 4096 UBI: number of internal volumes: 1 UBI: number of user volumes: 1 UBI: available PEBs: 6 UBI: total number of reserved PEBs: 58 UBI: number of PEBs reserved for bad PEB handling: 2 UBI: max/mean erase counter: 63/45 UBIFS: mounted UBI device 0, volume 0, name "database" UBIFS: mounted read-only UBIFS: file system size: 5459968 bytes (5332 KiB, 5 MiB, 43 LEBs) UBIFS: journal size: 1015809 bytes (992 KiB, 0 MiB, 6 LEBs) UBIFS: media format: w4/r0 (latest is w4/r0) UBIFS: default compressor: LZO UBIFS: reserved for root: 269835 bytes (263 KiB) Loading file 'openwrt-19.07.1-mxs-uImage' to addr 0x42000000 with size 1799536 (0x001b7570)... Done ## Booting kernel from Legacy Image at 42000000 ... Image Name: ARM OpenWrt Linux-4.14.167 Created: 2020-01-29 16:05:35 UTC Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 1799472 Bytes = 1.7 MiB Load Address: 40008000 Entry Point: 40008000 Verifying Checksum ... OK Loading Kernel Image ... OK
Starting kernel ...