Hi, there.
I'm trying to convert a device from the AR71XX target to the ATH79 build target. The device is a ZBT WE826-Q based on the QCA9531 SoC and uses the AP147 build and images on the AR71XX system.
I've written the device tree as here: https://github.com/wambu-i/openwrt/blob/ath79-ztb-we826q/target/linux/ath79/dts/qca9531_zbtlink_zbt-we826q.dts
I've also added the following device in target/linux/ath79/image/generic.mk
define Device/zbtlink_zbt-we826q
SOC := qca9531
DEVICE_VENDOR := ZBT
DEVICE_MODEL := WE826Q
IMAGE_SIZE := 16000k
DEVICE_PACKAGES := kmod-usb2 kmod-usb-storage
SUPPORTED_DEVICES += zbt-we826q
endef
TARGET_DEVICES += zbtlink_zbt-we826q
However, when I build the image and flash it, I get the following kernel panic:
Trying to boot firmware from 0x9fe80000 ...
U-Boot firmware image header detected.
Image Name: MIPS OpenWrt Linux-4.9.223
Data Size: 1416764 Bytes
Load Address: 80060000
Entry Point: 80060000
Uncompressing data (LZMA) ... done.
Flushing cache ... done.
Starting kernel at 0x80060000...
[ 0.000000] Linux version 4.9.223 (ubuntu@ip-172-31-27-145) (gcc version 7.3.0 (OpenWrt GCC 7.3.0 r6907+1099-7e15e21766) ) #0 Tue Jun 9 22:31:21 2020
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 00019374 (MIPS 24Kc)
[ 0.000000] SoC: Qualcomm Atheros QCA9533 ver 2 rev 0
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 08000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x0000000007ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x0000000007ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000007ffffff]
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512
[ 0.000000] Kernel command line: board=AP147-010 console=ttyS0,115200 mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,14528k(rootfs),1472k(kernel),64k(art)ro,16000k@0x50000(firmware) rootfstype=squashfs noinitrd
[ 0.000000] PID hash table entries: 512 (order: -1, 2048 bytes)
[ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Writing ErrCtl register=00000008
[ 0.000000] Readback ErrCtl register=00000008
[ 0.000000] Memory: 124816K/131072K available (3224K kernel code, 167K rwdata, 804K rodata, 276K init, 205K bss, 6256K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS:51
[ 0.000000] Clocks: CPU:550.000MHz, DDR:400.000MHz, AHB:200.000MHz, Ref:25.000MHz
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 6950037990 ns
[ 0.000011] sched_clock: 32 bits at 275MHz, resolution 3ns, wraps every 7809031678ns
[ 0.008896] Calibrating delay loop... 366.18 BogoMIPS (lpj=1830912)
[ 0.071924] pid_max: default: 32768 minimum: 301
[ 0.077305] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.084814] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.096447] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.107683] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.115344] NET: Registered protocol family 16
[ 0.122258] MIPS: machine is Atheros AP147-010 reference board
[ 0.133461] ar724x-pci ar724x-pci.0: PCIe link is down
[ 0.139304] registering PCI controller with io_map_base unset
[ 0.643202] PCI host bridge to bus 0000:00
[ 0.647950] pci_bus 0000:00: root bus resource [mem 0x10000000-0x11ffffff]
[ 0.655746] pci_bus 0000:00: root bus resource [io 0x0000]
[ 0.662076] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[ 0.669779] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[ 0.679660] clocksource: Switched to clocksource MIPS
[ 0.686698] NET: Registered protocol family 2
[ 0.692759] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.700751] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.707981] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.715333] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.722025] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.729469] NET: Registered protocol family 1
[ 0.740331] Crashlog allocated RAM at address 0x3f00000
[ 0.747923] workingset: timestamp_bits=30 max_order=15 bucket_order=0
[ 0.763263] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.769931] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.792598] io scheduler noop registered
[ 0.797059] io scheduler deadline registered (default)
[ 0.803437] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[ 0.811187] console [ttyS0] disabled
[ 0.835411] serial8250.0: ttyS0 at MMIO 0x18020000 (irq = 11, base_baud = 1562500) is a 16550A
[ 0.845227] console [ttyS0] enabled
[ 0.845227] console [ttyS0] enabled
[ 0.852784] bootconsole [early0] disabled
[ 0.852784] bootconsole [early0] disabled
[ 0.865946] m25p80 spi0.0: found w25q128, expected m25p80
[ 0.880854] m25p80 spi0.0: w25q128 (16384 Kbytes)
[ 0.885765] 6 cmdlinepart partitions found on MTD device spi0.0
[ 0.891900] Creating 6 MTD partitions on "spi0.0":
[ 0.896860] 0x000000000000-0x000000040000 : "u-boot"
[ 0.904528] 0x000000040000-0x000000050000 : "u-boot-env"
[ 0.912701] 0x000000050000-0x000000e80000 : "rootfs"
[ 0.919823] mtd: device 2 (rootfs) set to be root filesystem
[ 0.925727] mtdsplit: no squashfs found in "rootfs"
[ 0.931551] 0x000000e80000-0x000000ff0000 : "kernel"
[ 0.939031] 0x000000ff0000-0x000001000000 : "art"
[ 0.946534] 0x000000050000-0x000000ff0000 : "firmware"
[ 0.955711] libphy: Fixed MDIO Bus: probed
[ 0.986769] libphy: ag71xx_mdio: probed
[ 1.622236] ag71xx-mdio.1: Found an AR934X built-in switch
[ 1.675725] eth0: Atheros AG71xx at 0xba000000, irq 5, mode:GMII
[ 2.312639] ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.1:04 [uid=004dd042, driver=Generic PHY]
[ 2.322985] eth1: Atheros AG71xx at 0xb9000000, irq 4, mode:MII
[ 2.331389] NET: Registered protocol family 10
[ 2.340932] NET: Registered protocol family 17
[ 2.345717] 8021q: 802.1Q VLAN Support v1.8
[ 2.354018] List of all partitions:
[ 2.357659] 1f00 256 mtdblock0 [ 2.361871] (driver?)
[ 2.364312] 1f01 64 mtdblock1 [ 2.368444] (driver?)
[ 2.370898] 1f02 14528 mtdblock2 [ 2.375029] (driver?)
[ 2.377473] 1f03 1472 mtdblock3 [ 2.381616] (driver?)
[ 2.384060] 1f04 64 mtdblock4 [ 2.388191] (driver?)
[ 2.390647] 1f05 16000 mtdblock5 [ 2.394777] (driver?)
[ 2.397215] No filesystem could mount root, tried: [ 2.402072] squashfs
[ 2.404418]
[ 2.405968] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
[ 2.415626] Rebooting in 1 seconds..
I think that the panic is caused by the wrong bootargs in the following line:
Kernel command line: board=AP147-010 console=ttyS0,115200 mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,14528k(rootfs),1472k(kernel),64k(art)ro,16000k@0x50000(firmware) rootfstype=squashfs noinitrd
, but I have no idea how those are being selected over the bootargs in the device tree?
This device comes with a stock Chaos Calmer
image that has been upgraded to the newer AR71XX images, so I'm using the sysupgrade
image for flashing.
I've also tried overriding the bootargs in the kernel config, but it seems like those options currently do nothing according to this question.
CONFIG_CMDLINE="rootfstype=squashfs,jffs2 noinitrd console=ttyS0,115200"
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE_OVERRIDE=y
Is there any other specific file I need to specify the bootargs on? Or is something else causing the panic?