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最近项目需求，小弟开始重新研究全志v536，根文件系统是squashfs在此发现一个问题百思不得其解，特此请教一下。
软件工程师提出的需求是给他一个可以将提前准备好的文件以及文件夹传送至小机端的方案。因此小弟对软件包的makefile做了如下的修改。
define Package/xxxx/install
$(INSTALL_DIR) $(1)/filetest
$(INSTALL_DIR) $(1)/filetest/testD
$(INSTALL_DIR) $(1)/filetest/testE
$(INSTALL_BIN) $(1)/filetest/testD/FILE //FILE 为一普通文件
endef
但实际在小机端运行后发现，空文件夹testE是可以删除的，但执行rm /filetest/testD/ -rf 将报告如下错误：
“rm can't remove ‘testD’ ：invalid argument”
请问各位，此问题产生的原因是什么呢？有无办法规避。在此万分感谢大家！
精华帖: 17. lichee nano官方linux config文件踩坑与填坑（常见配置误区）
0x03: 开机后报大量JFFS2 erase size错误
这个lichee官方和论坛里很多人的帖子都有提到，修复方法是patch掉内核里对应flash型号的SECT_4K参数。但是实际上内核配置文件中为我们预留了关闭4K erase size 的选项，无需侵入内核代码修改。
禁用：Memory Technology Device (MTD) support ---> SPI-NOR device support ---> Use small 4096 B erase sectors
这样以后更换其他的flash芯片也无需重新修改内核。
晕哥，我在内核中已经关闭了此选项但依然这样，麻烦您看看串口的输出日志，给小弟一点思路：
https://whycan.cn/files/members/2352/201911101503.txt
要去掉 SECT_4K, 而不是加上: https://whycan.cn/t_1635.html#p9757
晕哥你好，我就是看了你的贴子后开始尝试解决这个问题的，感谢你的回复
是这样，我尝试按照这篇帖子：
https://whycan.cn/t_1570.html
提到的方式修改，可以成功进入系统了，但是出现了这篇帖子
https://whycan.cn/t_1108.html
提到的jffs2大量擦除警告的消息
我尝试过打开4B选项，但目前的spi-nor.c驱动不支持，这个
更换为最新的后又发现m25p80编译异常，所以觉得这里面坑太大没有进一步往下探究。
请问之前帖子中提到的问题您有解决思路吗
[ 1.367291] sunxi-wlan wlan: Missing wakeup_source!
[ 1.373496] m25p80 spi0.0: unrecognized JEDEC id bytes: ef, 71, 19
[ 1.380641] usb_serial_number:20080411有没有把这个 flash id 加到驱动?
之前有在公司电脑上加过，这个是在我自己电脑未添加ID出现的情况，添加后的情况如下：
https://whycan.cn/files/members/2352/201911071042.txt
可以看到出现了大量jffs2 擦除flash的情况。打开SECT4K选项后 也是如此
这是全部的 log 吗?
根据全志提供的v536芯片手册选用了w25m512jv nor flash后，发现源码中没有对应的ID，自行添加启动异常。并且出现了奇怪的按键打印现象。
按键答应异常如下：
[53]HELLO! BOOT0 is starting!
[56]boot0 commit : d62be0e6d8bce06823670773a769cddd0a95c626
[73]rsb_send_initseq: rsb clk 400Khz -> 3Mhz
[77]PMU: AXP2101
[79]set pll start
[82]set pll end
[84]key pressed value=0x00000039
[87]key pressed value=0x00000039
[130]key pressed value=0x00000039
[174]key pressed value=0x00000039
[217]key pressed value=0x00000039
[260]key pressed value=0x00000039
[304]key pressed value=0x00000039
[347]key pressed value=0x00000039
……
[8768]key pressed value=0x00000039
[8811]time out
[8812]DRAM BOOT DRIVE INFO: V0.32
[8816]DRAM_VCC set to 1500 mv
[8819]DRAM CLK =792 MHZ
[8821]DRAM Type =3 (3:DDR3,4:DDR4,7:LPDDR3,8:LPDDR4)
[8859]Training result is = 00000007
[8863]Actual DRAM SIZE =256 M
[8866]DRAM SIZE =256 MBytes, para1 = 000030ea, para2 = 01000001, dram_tpr13 = 08006843
[8882]DRAM simple test OK.
[8885]dram size =256
[8889]sunxi spinor is initing...ok
[8892]spinor id is 001971ef
[8895]Succeed in reading toc file head.
[8899]The size of toc is 00084000.
[9010]Entry_name = scp
[9021]set arisc reset to de-assert state
[9024]Entry_name = optee
[9028]Entry_name = u-boot
[9034]Entry_name = soc-cfg
[9038]Entry_name = dtb
[9042]Ready to disable icache.
[9045]Jump to sece[ 2.719630] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 2.728929] CPU1: stopping
[ 2.731973] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.118 #248
[ 2.738919] Hardware name: sun8iw16
[ 2.742863] [<c0012521>] (unwind_backtrace) from [<c000ff37>] (show_stack+0xb/0xc)
[ 2.751384] [<c000ff37>] (show_stack) from [<c01014e3>] (dump_stack+0x5b/0x70)
[ 2.759510] [<c01014e3>] (dump_stack) from [<c0011b41>] (handle_IPI+0x8d/0x104)
[ 2.767734] [<c0011b41>] (handle_IPI) from [<c000930b>] (gic_handle_irq+0x4b/0x54)
[ 2.776249] [<c000930b>] (gic_handle_irq) from [<c00105e5>] (__irq_svc+0x65/0xac)
[ 2.784662] Exception stack(0xc3071f78 to 0xc3071fc0)
[ 2.790340] 1f60: 00000000 c354f400
[ 2.799538] 1f80: 00000001 00000000 c2874800 00000001 a2a8125a 00000000 a22632f5 00000000
[ 2.808736] 1fa0: 00000001 00000000 00000000 c3071fc8 c0055a31 c01c1740 40000133 ffffffff
[ 2.817939] [<c00105e5>] (__irq_svc) from [<c01c1740>] (cpuidle_enter_state+0xa6/0x15e)
[ 2.826948] [<c01c1740>] (cpuidle_enter_state) from [<c003cd6f>] (cpu_startup_entry+0x10f/0x128)
[ 2.836833] [<c003cd6f>] (cpu_startup_entry) from [<400094f1>] (0x400094f1)
[ 2.844666] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 15.767429] random: crng init done
nd Boot.
MESSAGE: [0x0] TEE-CORE: OP-TEE version: sun8iw15p1_a50_8.1.0_v1.0-102-ga90d1c9 #2 2019骞05鏈27鏃鏄熸湡涓€ 02:20:12 UTC arm
MESSAGE: [0x0] TEE-CORE: arisc commit: bb7ad809514f677e6bbc711c7050ce8a095defe8
U-Boot 2014.07 (May 27 2019 - 19:31:28) Allwinner Technology
uboot commit : b1c1c5fb19667b71b0df55c0968121310132e2bd然后是启动到最后无法找到rootfs ：
[ 2.719630] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 2.728929] CPU1: stopping
[ 2.731973] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.118 #248
[ 2.738919] Hardware name: sun8iw16
[ 2.742863] [<c0012521>] (unwind_backtrace) from [<c000ff37>] (show_stack+0xb/0xc)
[ 2.751384] [<c000ff37>] (show_stack) from [<c01014e3>] (dump_stack+0x5b/0x70)
[ 2.759510] [<c01014e3>] (dump_stack) from [<c0011b41>] (handle_IPI+0x8d/0x104)
[ 2.767734] [<c0011b41>] (handle_IPI) from [<c000930b>] (gic_handle_irq+0x4b/0x54)
[ 2.776249] [<c000930b>] (gic_handle_irq) from [<c00105e5>] (__irq_svc+0x65/0xac)
[ 2.784662] Exception stack(0xc3071f78 to 0xc3071fc0)
[ 2.790340] 1f60: 00000000 c354f400
[ 2.799538] 1f80: 00000001 00000000 c2874800 00000001 a2a8125a 00000000 a22632f5 00000000
[ 2.808736] 1fa0: 00000001 00000000 00000000 c3071fc8 c0055a31 c01c1740 40000133 ffffffff
[ 2.817939] [<c00105e5>] (__irq_svc) from [<c01c1740>] (cpuidle_enter_state+0xa6/0x15e)
[ 2.826948] [<c01c1740>] (cpuidle_enter_state) from [<c003cd6f>] (cpu_startup_entry+0x10f/0x128)
[ 2.836833] [<c003cd6f>] (cpu_startup_entry) from [<400094f1>] (0x400094f1)
[ 2.844666] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 15.767429] random: crng init done之前在另一块源码中提到的16m FLASH中并无此现象 特此请教各位该解决思路，由衷感谢
我司最近新项目突然使用了全志最新的v536芯片。由于小弟才疏学浅，第一次接触全志自带的tina-SDK系统所以踩了很多雷。想求助几个问题
1：采用的norflash是w25m512jv。在spi-nor.c中加入了id后出现大量的jffs2擦除情况。按照之前帖子中提到的采用SECT4K 选项并将SPI速率调制16M之后仍然如此。
2.因为之前没用过squashfs格式的文件系统，所以在想采用用jffs2文件系统。在默认的分区下，系统无法正常启动。请问是否是分区问题。
3. 关于squashfs系统格式，因为是只读的，所以是否支持rz sz等命令传输文件。
小弟最近被boss催的很紧，又刚接触全志的芯片，还希望各位大佬不吝赐教。后续会上传一些问题的具体说明，如果各位需要，也会提供这块芯片的资料供大家研究
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