AT91SAM9X25 AT91SAM9G25 OpenWrt compilation and debugging pitfalls

[    4.250000] usbcore: registered new interface driver usbfs

[    4.250000] usbcore: registered new interface driver hub

[    4.260000] usbcore: registered new device driver usb

[    4.330000] SCSI subsystem initialized

[    4.340000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

[    4.360000] ehci-platform: EHCI generic platform driver

[    4.370000] ehci-atmel: EHCI Atmel driver

[    4.370000] atmel-ehci 700000.ehci: EHCI Host Controller

[    4.380000] atmel-ehci 700000.ehci: new USB bus registered, assigned bus number 1

[ 4.390000] atmel-ehci 700000.ehci: irq 36, io mem 0x00700000

[    4.410000] atmel-ehci 700000.ehci: USB 2.0 started, EHCI 1.00

[    4.420000] hub 1-0:1.0: USB hub found

[    4.420000] hub 1-0:1.0: 3 ports detected

[    4.450000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver

[    4.460000] ohci-platform: OHCI generic platform driver

[    4.480000] ohci-atmel: OHCI Atmel driver

[    4.490000] at91_ohci 600000.ohci: USB Host Controller

[    4.490000] at91_ohci 600000.ohci: new USB bus registered, assigned bus number 2

[    4.500000] at91_ohci 600000.ohci: irq 36, io mem 0x00600000

[    4.570000] hub 2-0:1.0: USB hub found

[    4.580000] hub 2-0:1.0: 3 ports detected

[    4.590000] usbcore: registered new interface driver usb-storage

[    4.610000] kmodloader: done loading kernel modules from /etc/modules-boot.d/*

[ 4.620000] init: - preinit -

[    6.820000] random: jshn: uninitialized urandom read (4 bytes read, 74 bits of entropy available)

[    7.010000] random: jshn: uninitialized urandom read (4 bytes read, 76 bits of entropy available)

[    7.200000] random: jshn: uninitialized urandom read (4 bytes read, 77 bits of entropy available)

[    7.370000] random: jshn: uninitialized urandom read (4 bytes read, 79 bits of entropy available)

[    7.530000] random: jshn: uninitialized urandom read (4 bytes read, 80 bits of entropy available)

[    7.710000] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

Press the [f] key and hit [enter] to enter failsafe mode

Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level

[   11.490000] UBIFS (ubi0:1): default file-system created

[   11.510000] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" started, PID 424

[   11.540000] random: procd: uninitialized urandom read (4 bytes read, 92 bits of entropy available)

[   11.560000] UBIFS (ubi0:1): UBIFS: mounted UBI device 0, volume 1, name "rootfs_data"

[   11.570000] UBIFS (ubi0:1): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes

[   11.580000] UBIFS (ubi0:1): FS size: 242651136 bytes (231 MiB, 1911 LEBs), journal size 12189696 bytes (11 MiB, 96 LEBs)

[   11.590000] UBIFS (ubi0:1): reserved for root: 4952683 bytes (4836 KiB)

[   11.600000] UBIFS (ubi0:1): media format: w4/r0 (latest is w4/r0), UUID 0CCEF651-A95D-4E63-8056-D80125FB38B7, small LPT model

[   11.610000] mount_root: overlay filesystem has not been fully initialized yet

[   11.620000] mount_root: switching to ubifs overlay

[   11.640000] urandom-seed: Seed file not found (/etc/urandom.seed)

[   12.830000] procd: - early -

[ 13.590000] procd: - consume -

[   13.850000] random: ubusd: uninitialized urandom read (4 bytes read, 95 bits of entropy available)

[   13.980000] random: ubusd: uninitialized urandom read (4 bytes read, 96 bits of entropy available)

[   13.990000] random: ubusd: uninitialized urandom read (4 bytes read, 96 bits of entropy available)

[   14.000000] random: ubusd: uninitialized urandom read (4 bytes read, 96 bits of entropy available)

[ 14.020000] procd: - heat -

Please press Enter to activate this console.

[   14.650000] kmodloader: loading kernel modules from /etc/modules.d/*

[   14.690000] ip6_tables: (C) 2000-2006 Netfilter Core Team

[   14.740000] atmel_usba_udc 500000.gadget: MMIO registers at 0xf803c000 mapped at c8b84000

[   14.750000] atmel_usba_udc 500000.gadget: FIFO at 0x00500000 mapped at d9100000

[   14.770000] i2c /dev entries driver

[   14.800000] usbcore: registered new interface driver cdc_acm

[   14.810000] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters

[   14.820000] usbcore: registered new interface driver cdc_wdm

[   14.830000] ip_tables: (C) 2000-2006 Netfilter Core Team

[   14.860000] nf_conntrack version 0.5.0 (1949 buckets, 7796 max)

[   14.900000] usbcore: registered new interface driver r8152

[   14.930000] usbcore: registered new interface driver usbserial

[   14.930000] usbcore: registered new interface driver usbserial_generic

[   14.940000] usbserial: USB Serial support registered for generic

[   14.980000] xt_time: kernel timezone is -0000

[   15.000000] usbcore: registered new interface driver cdc_ether

[   15.010000] usbcore: registered new interface driver ch341

[   15.010000] usbserial: USB Serial support registered for ch341-uart

[   15.020000] usbcore: registered new interface driver cp210x

[   15.030000] usbserial: USB Serial support registered for cp210x

[   15.040000] usbcore: registered new interface driver ftdi_sio

[   15.050000] usbserial: USB Serial support registered for FTDI USB Serial Device

[   15.080000] usbcore: registered new interface driver pl2303

[   15.090000] usbserial: USB Serial support registered for pl2303

[   15.100000] PPP generic driver version 2.4.2

[   15.110000] NET: Registered protocol family 24

[   15.120000] usbcore: registered new interface driver qmi_wwan

[   15.130000] usbcore: registered new interface driver rndis_host

[   15.160000] usbcore: registered new interface driver ipw

[   15.160000] usbserial: USB Serial support registered for IPWireless converter

[   15.190000] kmodloader: 1 module could not be probed

[   15.190000] kmodloader: - at91_udc - 0

[   30.350000] device eth0 entered promiscuous mode

[   30.380000] IPv6: ADDRCONF(NETDEV_UP): br-lan: link is not ready

[   31.820000] random: nonblocking pool is initialized

LEDE login: root

Password: 

BusyBox v1.25.1 () built-in shell (ash)

     _________

    /        /      _    ___ ___  ___

   / THE / | | | __| | __|

  /FROM/ | |__| _|| |) | _|

 /________/ THE |____|___|___/|___| lede-project.org

            OF /

      THE / ------------------------------------------------ -----------

     DE      /    Reboot (17.01-SNAPSHOT, r4046-beaa2ecc10)

    ________/    -----------------------------------------------------------

root@LEDE:~# 

In addition, the op kernels of versions 18.06 and 19.07 are in lzma compression format. Without modifying the Makefile, you need to compile a newer uboot and add support for lzma compression.