下面是启动的log
Starting kernel ...
[ 0.000000] Linux version 4.14.90 (aping@ubuntu) (gcc version 7.4.0 (OpenWrt GCC 7.4.0 r8915-74af8a8)) #0 Fri Dec 28 11:45:23 2018
[ 0.000000] Board has DDR2
[ 0.000000] Analog PMU set to hw control
[ 0.000000] Digital PMU set to hw control
[ 0.000000] SoC Type: MediaTek MT7628AN ver:1 eco:2
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 00019655 (MIPS 24KEc)
[ 0.000000] MIPS: machine is Mediatek MT7628AN evaluation board
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 10000000 @ 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, PIPT, no aliases, linesize 32 bytes
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] random: get_random_bytes called from start_kernel+0x8c/0x474 with crng_init=0
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 65024
[ 0.000000] Kernel command line: console=ttyS0,115200 rootfstype=squashfs,jffs2
[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Writing ErrCtl register=00052020
[ 0.000000] Readback ErrCtl register=00052020
[ 0.000000] Memory: 254004K/262144K available (4156K kernel code, 191K rwdata, 996K rodata, 216K init, 226K bss, 8140K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS: 256
[ 0.000000] intc: using register map from devicetree
[ 0.000000] CPU Clock: 575MHz
[ 0.000000] timer_probe: no matching timers found
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 6647862422 ns
[ 0.000011] sched_clock: 32 bits at 287MHz, resolution 3ns, wraps every 7469508094ns
[ 0.007543] Calibrating delay loop... 380.92 BogoMIPS (lpj=1904640)
[ 0.073457] pid_max: default: 32768 minimum: 301
[ 0.078148] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.084501] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.097048] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.106545] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.112497] pinctrl core: initialized pinctrl subsystem
[ 0.118091] NET: Registered protocol family 16
[ 0.160424] usbcore: registered new interface driver usbfs
[ 0.165764] usbcore: registered new interface driver hub
[ 0.170999] usbcore: registered new device driver usb
[ 0.175953] rt2880-pinmux pinctrl: pin io4 already requested by pinctrl; cannot claim for 10000900.i2c
[ 0.184927] rt2880-pinmux pinctrl: pin-4 (10000900.i2c) status -22
[ 0.190853] rt2880-pinmux pinctrl: could not request pin 4 (io4) from group i2c on device rt2880-pinmux
[ 0.200016] i2c-mt7621 10000900.i2c: Error applying setting, reverse things back
[ 0.207161] i2c-mt7621: probe of 10000900.i2c failed with error -22
[ 0.213490] Advanced Linux Sound Architecture Driver Initialized.
[ 0.223722] clocksource: Switched to clocksource MIPS
[ 0.229740] NET: Registered protocol family 2
[ 0.234854] TCP established hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.241572] TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.247761] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.254030] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.259632] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.266005] NET: Registered protocol family 1
[ 0.273881] Crashlog allocated RAM at address 0x3f00000
[ 0.280682] workingset: timestamp_bits=30 max_order=16 bucket_order=0
[ 0.292795] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.298430] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.318912] io scheduler noop registered
[ 0.322645] io scheduler deadline registered (default)
[ 0.328099] Serial: 8250/16550 driver, 3 ports, IRQ sharing disabled
[ 0.335453] console [ttyS0] disabled
[ 0.338895] 10000c00.uartlite: ttyS0 at MMIO 0x10000c00 (irq = 28, base_baud = 2500000) is a 16550A
[ 0.347673] console [ttyS0] enabled
[ 0.347673] console [ttyS0] enabled
[ 0.354669] bootconsole [early0] disabled
[ 0.354669] bootconsole [early0] disabled
[ 0.363404] 10000d00.uart1: ttyS1 at MMIO 0x10000d00 (irq = 29, base_baud = 2500000) is a 16550A
[ 0.373039] 10000e00.uart2: ttyS2 at MMIO 0x10000e00 (irq = 30, base_baud = 2500000) is a 16550A
[ 0.382506] cacheinfo: Failed to find cpu0 device node
[ 0.387760] cacheinfo: Unable to detect cache hierarchy for CPU 0
[ 0.395004] libphy: Fixed MDIO Bus: probed
[ 0.399350] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.406029] ehci-pci: EHCI PCI platform driver
[ 0.410671] i2c /dev entries driver
[ 0.420632] Enable Ralink GDMA Controller Module
[ 0.425484] GDMA IP Version=3
[ 0.429744] NET: Registered protocol family 10
[ 0.448157] Segment Routing with IPv6
[ 0.451991] NET: Registered protocol family 17
[ 0.456633] 8021q: 802.1Q VLAN Support v1.8
[ 0.462708] ALSA device list:
[ 0.465794] #0: Loopback 1
[ 0.469832]
*VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6*
*[ 0.477499] Please append a correct "root=" boot option; here are the available partitions:*
*[ 0.485980] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)*
````Preformatted text`
[ 0.495270] Rebooting in 1 seconds..
Board: Ralink APSoC DRAM: 256 MB
relocate_code Pointer at: 8ffac000
******************************
Software System Reset Occurred
******************************
flash manufacture id: ef, device id 40 19
find flash: W25Q256FV
*****************************************
* ZhuoTK Technology Co.,Ltd *
* www.zhuotk.com *
*****************************************
U-Boot 1.1.3 (Jan 6 2017 - 11:39:48)
============================================
Ralink UBoot Version: 4.3.0.0
--------------------------------------------
ASIC 7628_MP (Port5<->None)
DRAM component: 2048 Mbits DDR, width 16
DRAM bus: 16 bit
Total memory: 256 MBytes
Flash component: SPI Flash
Date:Jan 6 2017 Time:11:39:48
============================================
icache: sets:512, ways:4, linesz:32 ,total:65536
dcache: sets:256, ways:4, linesz:32 ,total:32768
##### The CPU freq = 575 MHZ ####
estimate memory size =256 Mbytes
RESET MT7628 PHY!!!!!!
Press the [1] key when power on to enter web upgrade mode
Continue normal boot...
Please choose the operation:
1: Load system code to SDRAM via TFTP.
2: Load system code then write to Flash via TFTP.
3: Boot system code via Flash (default).
4: Entr boot command line interface.
5: Entr ALL LED test mode.
6: Entr Web failsafe mode.
7: Load Boot Loader code then write to Flash via Serial.
9: Load Boot Loader code then write to Flash via TFTP. 0
3: System Boot system code via Flash.
## Booting image at bc050000 ...
Image Name: MIPS OpenWrt Linux-4.14.90
Image Type: MIPS Linux Kernel Image (lzma compressed)
Data Size: 1790315 Bytes = 1.7 MB
Load Address: 80000000
Entry Point: 80000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
No initrd
## Transferring control to Linux (at address 80000000) ...
## Giving linux memsize in MB, 256
Starting kernel ...
请问怎么解决