diff --git a/doc/board/AndesTech/ax25-ae350.rst b/doc/board/AndesTech/ax25-ae350.rst
index a7bd1a75e8..8874325840 100644
--- a/doc/board/AndesTech/ax25-ae350.rst
+++ b/doc/board/AndesTech/ax25-ae350.rst
@@ -62,9 +62,10 @@ Configurations
 --------------

 CONFIG_SKIP_LOWLEVEL_INIT:
-	If you want to boot this system from SPI ROM and bypass e-bios (the
-	other boot loader on ROM). You should undefine CONFIG_SKIP_LOWLEVEL_INIT
-	in "include/configs/ax25-ae350.h".
+
+If you want to boot this system from SPI ROM and bypass e-bios (the
+other boot loader on ROM). You should undefine CONFIG_SKIP_LOWLEVEL_INIT
+in "include/configs/ax25-ae350.h".

 Build and boot steps
 --------------------
@@ -165,7 +166,7 @@ Messages of U-Boot boot on AE350 board
    crc32 for 80000000 ... 80050452 ==> 692dc44a
    RISC-V #

-   *** power-off and power-on, this U-Boot is booted from spi flash 	***
+   *** power-off and power-on, this U-Boot is booted from spi flash ***

    U-Boot 2018.01-rc2-00032-gf67dd47-dirty (Dec 21 2017 - 13:56:03 +0800)

@@ -365,168 +366,168 @@ Messages of U-Boot SPL boots Kernel on AE350 board

 .. code-block:: none

-U-Boot SPL 2020.01-rc1-00292-g67a3313-dirty (Nov 14 2019 - 11:26:21 +0800)
-Trying to boot from RAM
-
-OpenSBI v0.5-1-gdd8ef28 (Nov 14 2019 11:08:39)
-   ____                    _____ ____ _____
-  / __ \                  / ____|  _ \_   _|
- | |  | |_ __   ___ _ __ | (___ | |_) || |
- | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
- | |__| | |_) |  __/ | | |____) | |_) || |_
-  \____/| .__/ \___|_| |_|_____/|____/_____|
-        | |
-        |_|
-
-Platform Name          : Andes AE350
-Platform HART Features : RV64ACIMSUX
-Platform Max HARTs     : 4
-Current Hart           : 0
-Firmware Base          : 0x0
-Firmware Size          : 84 KB
-Runtime SBI Version    : 0.2
-
-PMP0: 0x0000000000000000-0x000000000001ffff (A)
-PMP1: 0x0000000000000000-0x00000001ffffffff (A,R,W,X)
-
-
-U-Boot 2020.01-rc1-00292-g67a3313-dirty (Nov 14 2019 - 11:26:21 +0800)
-
-DRAM:  1 GiB
-Flash: 64 MiB
-MMC:   mmc@f0e00000: 0
-Loading Environment from SPI Flash... SF: Detected mx25u1635e with page size 256 Bytes, erase size 4 KiB, total 2 MiB
-OK
-In:    serial@f0300000
-Out:   serial@f0300000
-Err:   serial@f0300000
-Net:   no alias for ethernet0
-
-Warning: mac@e0100000 (eth0) using random MAC address - a2:ae:93:7b:cc:8f
-eth0: mac@e0100000
-Hit any key to stop autoboot:  0
-6455 bytes read in 31 ms (203.1 KiB/s)
-20421684 bytes read in 8647 ms (2.3 MiB/s)
-## Booting kernel from Legacy Image at 00600000 ...
-   Image Name:
-   Image Type:   RISC-V Linux Kernel Image (uncompressed)
-   Data Size:    20421620 Bytes = 19.5 MiB
-   Load Address: 00200000
-   Entry Point:  00200000
-   Verifying Checksum ... OK
-## Flattened Device Tree blob at 20000000
-   Booting using the fdt blob at 0x20000000
-   Loading Kernel Image
-   Loading Device Tree to 000000001effb000, end 000000001efff936 ... OK
-
-Starting kernel ...
-
-OF: fdt: Ignoring memory range 0x0 - 0x200000
-Linux version 4.17.0-00253-g49136e10bcb2 (sqa@atcsqa07) (gcc version 7.3.0 (2019-04-06_nds64le-linux-glibc-v5_experimental)) #1 SMP PREEMPT Sat Apr 6 23:41:49 CST 2019
-bootconsole [early0] enabled
-Initial ramdisk at: 0x        (ptrval) (13665712 bytes)
-Zone ranges:
-  DMA32    [mem 0x0000000000200000-0x000000003fffffff]
-  Normal   empty
-Movable zone start for each node
-Early memory node ranges
-  node   0: [mem 0x0000000000200000-0x000000003fffffff]
-Initmem setup node 0 [mem 0x0000000000200000-0x000000003fffffff]
-software IO TLB [mem 0x3b1f8000-0x3f1f8000] (64MB) mapped at [        (ptrval)-        (ptrval)]
-elf_platform is rv64i2p0m2p0a2p0c2p0xv5-0p0
-compatible privileged spec version 1.10
-percpu: Embedded 16 pages/cpu @        (ptrval) s28184 r8192 d29160 u65536
-Built 1 zonelists, mobility grouping on.  Total pages: 258055
-Kernel command line: console=ttyS0,38400n8 debug loglevel=7
-log_buf_len individual max cpu contribution: 4096 bytes
-log_buf_len total cpu_extra contributions: 12288 bytes
-log_buf_len min size: 16384 bytes
-log_buf_len: 32768 bytes
-early log buf free: 14608(89%)
-Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
-Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
-Sorting __ex_table...
-Memory: 944428K/1046528K available (3979K kernel code, 246K rwdata, 1490K rodata, 13523K init, 688K bss, 102100K reserved, 0K cma-reserved)
-SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
-Preemptible hierarchical RCU implementation.
-        Tasks RCU enabled.
-NR_IRQS: 72, nr_irqs: 72, preallocated irqs: 0
-riscv,cpu_intc,0: 64 local interrupts mapped
-riscv,cpu_intc,1: 64 local interrupts mapped
-riscv,cpu_intc,2: 64 local interrupts mapped
-riscv,cpu_intc,3: 64 local interrupts mapped
-riscv,plic0,e4000000: mapped 71 interrupts to 8/8 handlers
-clocksource: riscv_clocksource: mask: 0xffffffffffffffff max_cycles: 0x1bacf917bf, max_idle_ns: 881590412290 ns
-sched_clock: 64 bits at 60MHz, resolution 16ns, wraps every 4398046511098ns
-Console: colour dummy device 40x30
-Calibrating delay loop (skipped), value calculated using timer frequency.. 120.00 BogoMIPS (lpj=600000)
-pid_max: default: 32768 minimum: 301
-Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
-Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
-Hierarchical SRCU implementation.
-smp: Bringing up secondary CPUs ...
-CPU0: online
-CPU2: online
-CPU3: online
-smp: Brought up 1 node, 4 CPUs
-devtmpfs: initialized
-random: get_random_u32 called from bucket_table_alloc+0x198/0x1d8 with crng_init=0
-clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
-futex hash table entries: 1024 (order: 4, 65536 bytes)
-NET: Registered protocol family 16
-Advanced Linux Sound Architecture Driver Initialized.
-clocksource: Switched to clocksource riscv_clocksource
-NET: Registered protocol family 2
-tcp_listen_portaddr_hash hash table entries: 512 (order: 1, 8192 bytes)
-TCP established hash table entries: 8192 (order: 4, 65536 bytes)
-TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
-TCP: Hash tables configured (established 8192 bind 8192)
-UDP hash table entries: 512 (order: 2, 16384 bytes)
-UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
-NET: Registered protocol family 1
-RPC: Registered named UNIX socket transport module.
-RPC: Registered udp transport module.
-RPC: Registered tcp transport module.
-RPC: Registered tcp NFSv4.1 backchannel transport module.
-Unpacking initramfs...
-workingset: timestamp_bits=62 max_order=18 bucket_order=0
-NFS: Registering the id_resolver key type
-Key type id_resolver registered
-Key type id_legacy registered
-nfs4filelayout_init: NFSv4 File Layout Driver Registering...
-io scheduler noop registered
-io scheduler cfq registered (default)
-io scheduler mq-deadline registered
-io scheduler kyber registered
-Console: switching to colour frame buffer device 40x30
-Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
-console [ttyS0] disabled
-f0300000.serial: ttyS0 at MMIO 0xf0300020 (irq = 20, base_baud = 1228800) is a 16550A
-console [ttyS0] enabled
-console [ttyS0] enabled
-bootconsole [early0] disabled
-bootconsole [early0] disabled
-loop: module loaded
-tun: Universal TUN/TAP device driver, 1.6
-ftmac100: Loading version 0.2 ...
-ftmac100 e0100000.mac eth0: irq 21, mapped at         (ptrval)
-ftmac100 e0100000.mac eth0: generated random MAC address 4e:fd:bd:f3:04:fc
-ftsdc010 f0e00000.mmc: mmc0 - using hw SDIO IRQ
-mmc0: new SDHC card at address d555
-ftssp010 card registered!
-mmcblk0: mmc0:d555 SD04G 3.79 GiB
-NET: Registered protocol family 10
- mmcblk0: p1
-Segment Routing with IPv6
-sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
-NET: Registered protocol family 17
-NET: Registered protocol family 15
-ALSA device list:
-  #0: ftssp_ac97 controller
-Freeing unused kernel memory: 13520K
-This architecture does not have kernel memory protection.
-Sysinit starting
-Sat Apr  6 23:33:53 CST 2019
-nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
+    U-Boot SPL 2020.01-rc1-00292-g67a3313-dirty (Nov 14 2019 - 11:26:21 +0800)
+    Trying to boot from RAM
+
+    OpenSBI v0.5-1-gdd8ef28 (Nov 14 2019 11:08:39)
+       ____                    _____ ____ _____
+      / __ \                  / ____|  _ \_   _|
+     | |  | |_ __   ___ _ __ | (___ | |_) || |
+     | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
+     | |__| | |_) |  __/ | | |____) | |_) || |_
+      \____/| .__/ \___|_| |_|_____/|____/_____|
+            | |
+            |_|
+
+    Platform Name          : Andes AE350
+    Platform HART Features : RV64ACIMSUX
+    Platform Max HARTs     : 4
+    Current Hart           : 0
+    Firmware Base          : 0x0
+    Firmware Size          : 84 KB
+    Runtime SBI Version    : 0.2
+
+    PMP0: 0x0000000000000000-0x000000000001ffff (A)
+    PMP1: 0x0000000000000000-0x00000001ffffffff (A,R,W,X)
+
+
+    U-Boot 2020.01-rc1-00292-g67a3313-dirty (Nov 14 2019 - 11:26:21 +0800)
+
+    DRAM:  1 GiB
+    Flash: 64 MiB
+    MMC:   mmc@f0e00000: 0
+    Loading Environment from SPI Flash... SF: Detected mx25u1635e with page size 256 Bytes, erase size 4 KiB, total 2 MiB
+    OK
+    In:    serial@f0300000
+    Out:   serial@f0300000
+    Err:   serial@f0300000
+    Net:   no alias for ethernet0
+
+    Warning: mac@e0100000 (eth0) using random MAC address - a2:ae:93:7b:cc:8f
+    eth0: mac@e0100000
+    Hit any key to stop autoboot:  0
+    6455 bytes read in 31 ms (203.1 KiB/s)
+    20421684 bytes read in 8647 ms (2.3 MiB/s)
+    ## Booting kernel from Legacy Image at 00600000 ...
+       Image Name:
+       Image Type:   RISC-V Linux Kernel Image (uncompressed)
+       Data Size:    20421620 Bytes = 19.5 MiB
+       Load Address: 00200000
+       Entry Point:  00200000
+       Verifying Checksum ... OK
+    ## Flattened Device Tree blob at 20000000
+       Booting using the fdt blob at 0x20000000
+       Loading Kernel Image
+       Loading Device Tree to 000000001effb000, end 000000001efff936 ... OK
+
+    Starting kernel ...
+
+    OF: fdt: Ignoring memory range 0x0 - 0x200000
+    Linux version 4.17.0-00253-g49136e10bcb2 (sqa@atcsqa07) (gcc version 7.3.0 (2019-04-06_nds64le-linux-glibc-v5_experimental)) #1 SMP PREEMPT Sat Apr 6 23:41:49 CST 2019
+    bootconsole [early0] enabled
+    Initial ramdisk at: 0x        (ptrval) (13665712 bytes)
+    Zone ranges:
+      DMA32    [mem 0x0000000000200000-0x000000003fffffff]
+      Normal   empty
+    Movable zone start for each node
+    Early memory node ranges
+      node   0: [mem 0x0000000000200000-0x000000003fffffff]
+    Initmem setup node 0 [mem 0x0000000000200000-0x000000003fffffff]
+    software IO TLB [mem 0x3b1f8000-0x3f1f8000] (64MB) mapped at [        (ptrval)-        (ptrval)]
+    elf_platform is rv64i2p0m2p0a2p0c2p0xv5-0p0
+    compatible privileged spec version 1.10
+    percpu: Embedded 16 pages/cpu @        (ptrval) s28184 r8192 d29160 u65536
+    Built 1 zonelists, mobility grouping on.  Total pages: 258055
+    Kernel command line: console=ttyS0,38400n8 debug loglevel=7
+    log_buf_len individual max cpu contribution: 4096 bytes
+    log_buf_len total cpu_extra contributions: 12288 bytes
+    log_buf_len min size: 16384 bytes
+    log_buf_len: 32768 bytes
+    early log buf free: 14608(89%)
+    Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
+    Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
+    Sorting __ex_table...
+    Memory: 944428K/1046528K available (3979K kernel code, 246K rwdata, 1490K rodata, 13523K init, 688K bss, 102100K reserved, 0K cma-reserved)
+    SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
+    Preemptible hierarchical RCU implementation.
+            Tasks RCU enabled.
+    NR_IRQS: 72, nr_irqs: 72, preallocated irqs: 0
+    riscv,cpu_intc,0: 64 local interrupts mapped
+    riscv,cpu_intc,1: 64 local interrupts mapped
+    riscv,cpu_intc,2: 64 local interrupts mapped
+    riscv,cpu_intc,3: 64 local interrupts mapped
+    riscv,plic0,e4000000: mapped 71 interrupts to 8/8 handlers
+    clocksource: riscv_clocksource: mask: 0xffffffffffffffff max_cycles: 0x1bacf917bf, max_idle_ns: 881590412290 ns
+    sched_clock: 64 bits at 60MHz, resolution 16ns, wraps every 4398046511098ns
+    Console: colour dummy device 40x30
+    Calibrating delay loop (skipped), value calculated using timer frequency.. 120.00 BogoMIPS (lpj=600000)
+    pid_max: default: 32768 minimum: 301
+    Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
+    Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
+    Hierarchical SRCU implementation.
+    smp: Bringing up secondary CPUs ...
+    CPU0: online
+    CPU2: online
+    CPU3: online
+    smp: Brought up 1 node, 4 CPUs
+    devtmpfs: initialized
+    random: get_random_u32 called from bucket_table_alloc+0x198/0x1d8 with crng_init=0
+    clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
+    futex hash table entries: 1024 (order: 4, 65536 bytes)
+    NET: Registered protocol family 16
+    Advanced Linux Sound Architecture Driver Initialized.
+    clocksource: Switched to clocksource riscv_clocksource
+    NET: Registered protocol family 2
+    tcp_listen_portaddr_hash hash table entries: 512 (order: 1, 8192 bytes)
+    TCP established hash table entries: 8192 (order: 4, 65536 bytes)
+    TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
+    TCP: Hash tables configured (established 8192 bind 8192)
+    UDP hash table entries: 512 (order: 2, 16384 bytes)
+    UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
+    NET: Registered protocol family 1
+    RPC: Registered named UNIX socket transport module.
+    RPC: Registered udp transport module.
+    RPC: Registered tcp transport module.
+    RPC: Registered tcp NFSv4.1 backchannel transport module.
+    Unpacking initramfs...
+    workingset: timestamp_bits=62 max_order=18 bucket_order=0
+    NFS: Registering the id_resolver key type
+    Key type id_resolver registered
+    Key type id_legacy registered
+    nfs4filelayout_init: NFSv4 File Layout Driver Registering...
+    io scheduler noop registered
+    io scheduler cfq registered (default)
+    io scheduler mq-deadline registered
+    io scheduler kyber registered
+    Console: switching to colour frame buffer device 40x30
+    Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
+    console [ttyS0] disabled
+    f0300000.serial: ttyS0 at MMIO 0xf0300020 (irq = 20, base_baud = 1228800) is a 16550A
+    console [ttyS0] enabled
+    console [ttyS0] enabled
+    bootconsole [early0] disabled
+    bootconsole [early0] disabled
+    loop: module loaded
+    tun: Universal TUN/TAP device driver, 1.6
+    ftmac100: Loading version 0.2 ...
+    ftmac100 e0100000.mac eth0: irq 21, mapped at         (ptrval)
+    ftmac100 e0100000.mac eth0: generated random MAC address 4e:fd:bd:f3:04:fc
+    ftsdc010 f0e00000.mmc: mmc0 - using hw SDIO IRQ
+    mmc0: new SDHC card at address d555
+    ftssp010 card registered!
+    mmcblk0: mmc0:d555 SD04G 3.79 GiB
+    NET: Registered protocol family 10
+     mmcblk0: p1
+    Segment Routing with IPv6
+    sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
+    NET: Registered protocol family 17
+    NET: Registered protocol family 15
+    ALSA device list:
+      #0: ftssp_ac97 controller
+    Freeing unused kernel memory: 13520K
+    This architecture does not have kernel memory protection.
+    Sysinit starting
+    Sat Apr  6 23:33:53 CST 2019
+    nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...

 ~ #
