Rootfs error of Buildroot for nuc980

[yongzhiliu1006]

Dear sir: I am using buildroot to generate rootfs image for a 980 dev board. The 980 MPU boot from a spi nor flash w25q256. The uboot and kernel seem to be ok from the message printed. But the rootfs from buildroot seem to be wrong."**devtmpfs: error mounting -2". It puzzled me for a long time. And I tried several version of buildroot, no one worked on the board. Please give me some advice on this issue. Thank you very much!

NUC980 IBR 20180813 Boot from SPI-NOR DDR-OK fK皀-F{籹 NUC980 IBR 20180813 Boot from SPI-NOR DDR-OK finish SPI dow頪#S

U-Boot 2016.11 (Apr 21 2023 - 02:09:10 -0700)

CPU: NUC980 Board: NUC980 DRAM: 64 MiB SF: Detected W25Q256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB In: serial Out: serial Err: serial Net: Net Initialization Skipped No ethernet found. Hit any key to stop autoboot: 2  1  0 SF: Detected W25Q256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB device 0 offset 0x200000, size 0x760000 SF: 7733248 bytes @ 0x200000 Read: OK

Booting kernel from Legacy Image at 00007fc0 ...

Image Name: Linux-4.4.289 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2147264 Bytes = 2 MiB Load Address: 00008000 Entry Point: 00008000 Verifying Checksum ... OK XIP Kernel Image ... OK

Starting kernel ...

SF: Detected W25Q256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB SF: Device\0Booting Linux on physical CPU 0x0 Linux version 4.4.289 (root@yang-Inspiron-3137) (gcc version 4.6.4 (crosstool-NG hg+unknown-20130521.154019 - tc0002) ) #21 PREEMPT Wed May 3 21:13:48 CST 2023 CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f CPU: VIVT data cache, VIVT instruction cache Machine: NUC980 Memory policy: Data cache writeback Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256 Kernel command line: root=/dev/mtdblock1 console=ttyS0,115200n8 rdinit=/sbin/init rootfstype=jffs2 mem=64M) PID hash table entries: 256 (order: -2, 1024 bytes) Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) Memory: 60264K/65536K available (3182K kernel code, 183K rwdata, 892K rodata, 148K init, 205K bss, 5272K reserved, 0K cma-reserved) Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xffc00000 - 0xfff00000 (3072 kB) vmalloc : 0xc4800000 - 0xff800000 ( 944 MB) lowmem : 0xc0000000 - 0xc4000000 ( 64 MB) modules : 0xbf000000 - 0xc0000000 ( 16 MB) .text : 0xc0008000 - 0xc0402d64 (4076 kB) .init : 0xc0403000 - 0xc0428000 ( 148 kB) .data : 0xc0428000 - 0xc0455f60 ( 184 kB) .bss : 0xc0455f60 - 0xc04894f4 ( 206 kB) SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 Preemptible hierarchical RCU implementation. Build-time adjustment of leaf fanout to 32. NR_IRQS:545 clocksource: nuc980-timer5: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 62215505635 ns sched_clock: 24 bits at 120kHz, resolution 8333ns, wraps every 69905062489ns Console: colour dummy device 80x30 console [ttyS0] enabled Calibrating delay loop... 148.88 BogoMIPS (lpj=744448) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) CPU: Testing write buffer coherency: ok Setting up static identity map for 0x8400 - 0x843c devtmpfs: initialized clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns futex hash table entries: 256 (order: -1, 3072 bytes) pinctrl core: initialized pinctrl subsystem NET: Registered protocol family 16 DMA: preallocated 256 KiB pool for atomic coherent allocations SCSI subsystem initialized usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb pps_core: LinuxPPS API ver. 1 registered pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti giometti@linux.it PTP clock support registered clocksource: Switched to clocksource nuc980-timer5 NET: Registered protocol family 2 IP idents hash table entries: 2048 (order: 2, 16384 bytes) TCP established hash table entries: 1024 (order: 0, 4096 bytes) TCP bind hash table entries: 1024 (order: 0, 4096 bytes) TCP: Hash tables configured (established 1024 bind 1024) UDP hash table entries: 256 (order: 0, 4096 bytes) UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) NET: Registered protocol family 1 NetWinder Floating Point Emulator V0.97 (double precision) jffs2: version 2.2. (NAND) (SUMMARY) 漏 2001-2006 Red Hat, Inc. romfs: ROMFS MTD (C) 2007 Red Hat, Inc. io scheduler noop registered (default) nuc980_gpio_probe - pdev = nuc980-gpio nuc980_dma_probe - pdev = nuc980-dma nuc980-dma nuc980-dma: NUC980 DMA ready nuc980-uart.0: ttyS0 at I/O 0x0 (irq = 36, base_baud = 750000) is a NUC980 brd: module loaded SCSI Media Changer driver v0.25 m25p80 spi0.0: w25q256 (32768 Kbytes) Creating 2 MTD partitions on "m25p80": 0x000000000000-0x000000800000 : "kernel" 0x000000800000-0x000001000000 : "rootfs" RX nuc980_spi0_probe: dma0chan0 module removed TX nuc980_spi0_probe: dma0chan1 module removed m25p80 spi1.0: unrecognized JEDEC id bytes: ff, ff, ff libphy: nuc980_rmii0: probed libphy: nuc980_rmii1: probed ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver nuc980-ehci nuc980-ehci: Nuvoton NUC980 EHCI Host Controller nuc980-ehci nuc980-ehci: new USB bus registered, assigned bus number 1 nuc980-ehci nuc980-ehci: irq 23, io mem 0xb0015000 nuc980-ehci nuc980-ehci: USB 2.0 started, EHCI 0.95 hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver usb_hcd_nuc980_probe, id = 0, name: nuc980-ohci.0, 0 nuc980-ohci nuc980-ohci.0: Nuvoton NUC980 OHCI Host Controller nuc980-ohci nuc980-ohci.0: new USB bus registered, assigned bus number 2 nuc980-ohci nuc980-ohci.0: irq 24, io mem 0xb0017000 hub 2-0:1.0: USB hub found hub 2-0:1.0: 8 ports detected usb_hcd_nuc980_probe, id = 1, name: nuc980-ohci.1, 0 usb_hcd_nuc980_probe, id = 2, name: nuc980-ohci.2, 0 usb_hcd_nuc980_probe, id = 3, name: nuc980-ohci.3, 0 usb_hcd_nuc980_probe, id = 4, name: nuc980-ohci.4, 0 usb_hcd_nuc980_probe, id = 5, name: nuc980-ohci.5, 0 usb_hcd_nuc980_probe, id = 6, name: nuc980-ohci.6, 0 usbcore: registered new interface driver usb-storage nuc980-rtc nuc980-rtc: rtc core: registered nuc980-rtc as rtc0 usbcore: registered new interface driver usbhid usbhid: USB HID core driver NET: Registered protocol family 17 nuc980-rtc nuc980-rtc: setting system clock to 2005-01-01 00:00:00 UTC (1104537600) VFS: Mounted root (jffs2 filesystem) on device 31:1. //////////////////////////////////////////////////////////////////////////////seem to be wrong from here////////////////////////////// devtmpfs: error mounting -2 Freeing unused kernel memory: 148K Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/init.txt for guidance. CPU: 0 PID: 1 Comm: swapper Not tainted 4.4.289 #21 Hardware name: NUC980 Backtrace: [] (dump_backtrace) from [] (show_stack+0x18/0x1c) r6:00000000 r5:c031d91c r4:c0456208 r3:00000000 [] (show_stack) from [] (dump_stack+0x20/0x28) [] (dump_stack) from [] (panic+0xac/0x23c) [] (panic) from [] (kernel_init+0xc8/0xec) r3:c3840000 r2:c3f6e0b0 r1:60000013 r0:c03ad014 r7:00000000 [] (kernel_init) from [] (ret_from_fork+0x14/0x3c) r4:00000000 r3:ffffffff ---[ end Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.

[yongzhiliu1006]

buildroot config of nuc980.txt

[ychuang3]

yaffs2 is for NAND flash, but you are boorting from SPI NOR. You may have selected the wrong defconfig. What's the name of board you are using?

[yongzhiliu1006]

The issue solved. I do not fully understand the mkfs utility, packed wrong dir.