@whycan 将设备树这三行注释掉就好了，

  twi_drv_used = <1>;
 dmas = <&dma 45>, <&dma 45>;
 dma-names = "tx", "rx";

T113S使用i2c接口连接外置RTC初始化失败，这个是什么原因

[    4.429716] sunxi-i2c sunxi-i2c2: sunxi-i2c2 supply twi not found, using dummy regulator
 [    4.444395] sunxi-i2c sunxi-i2c2: drv-mode: Timeout when sending 9th SCL clk
[    4.452364] sunxi-i2c sunxi-i2c2: drv-mode: xfer failed (dev addr:0x51)
[    4.459795] rtc-pcf8563 2-0051: pcf8563_write_block_data: err=-22 addr=0e, data=03
[    4.468327] rtc-pcf8563 2-0051: pcf8563_probe: write error
[    4.474816] rtc-pcf8563: probe of 2-0051 failed with error -5
[    4.481305] sunxi-i2c sunxi-i2c2: probe success
[    4.488591] sunxi-i2c sunxi-i2c3: sunxi-i2c3 supply twi not found, using dummy regulator
[    4.501228] sunxi-i2c sunxi-i2c3: probe success

使用longanLinux kernel5.4设备树配置

 twi2_pins_a: twi2@0 {
 	pins = "PG14", "PG15";
 	function = "twi2";
 	drive-strength = <10>;
 };

 twi2_pins_b: twi2@1 {
 	pins = "PG14", "PG15";
 	function = "gpio_in";
 };

 &twi2 {
 clock-frequency = <400000>;
 pinctrl-0 = <&twi2_pins_a>;
 pinctrl-1 = <&twi2_pins_b>;
 pinctrl-names = "default", "sleep";
 twi_drv_used = <1>;
 dmas = <&dma 45>, <&dma 45>;
 dma-names = "tx", "rx";
 status = "okay";
 pcf8563: pcf8563@51 {
 	compatible = "nxp,pcf8563";
 	reg = <0x51>;
 	#clock-cells = <0>;
 };

};

终于调通了，简直就是一个大坑...由于WiFi驱动里面cfg80211.h的接口定义跟内核版本的cfg80211.h的接口不一致，导致调用时传入的数据不对了，但是奇怪的是，这编译时或者运行时为什么不报错呢......

网络抓包发现，在关联成功后的四次握手交换密钥时，STA设备没有回复，查下处理KEY的接口。

Authenticated with 78:44:fd:be:c6:64 (on wlan0)
Not connected.

1.查看想要连接BSSID已经验证成功了，但是查看WIFI没有连接上，而且下面一直有个其他MAC地址的一直在解除认证数据帧，scan了下WiFi，附近根本没有此MAC地址的设备。

[STA_WRN] Freq 2462 (wsm ch: 11) prev: 3.
[XRADIO] if0-TX-auth-- (认证请求)
[XRADIO] if0-RX-auth-- (接收认证)
[STA_WRN] Freq 2422 (wsm ch: 3) prev: 11.
[STA_WRN] Freq 2462 (wsm ch: 11) prev: 3.
[XRADIO] if0-TX-assoc_req-- (关联请求)
[XRADIO] if0-RX-assoc_resp-- (关联成功)
[AP_WRN] [STA] ASSOC HTCAP 11N 58
[XRADIO] if0-TX-deauth-- (解除认证)
[WSM_WRN] Issue unjoin command(TX).

调试发现，已经成功认证连接了，但是不知道为什么马上又发送了deauth解除认证，断开连接的数据帧。导致WiFi没有连接上

Successfully initialized wpa_supplicant
nl80211: Could not re-add multicast membership for vendor events: -2 (No such file or directory)
[STA_WRN] Freq 2412 (wsm ch: 1) prev: 3.
[STA_WRN] Freq 2422 (wsm ch: 3) prev: 1.
[STA_WRN] Freq 2412 (wsm ch: 1) prev: 3.
[AP_WRN] [STA] ASSOC HTCAP 11N 58
[WSM_WRN] Issue unjoin command(TX).

使用wpa_cli -i wlan0 scan 可以正常扫描都附近的wiif，配置wpa_supplicant连接后，打印上述信息后就没反应了。
wpa_state=SCANNING，一直处于这个状态。
WiFi热点配置都没有问题，猜测可能驱动哪里没有配置好

MobaXterm_COM20USB-SERIALCH340COM202_20230531_085202.txt

MobaXterm_COM20USB-SERIALCH340COM202_20230531_092432.txt

ubiupdatevol /dev/ubi0_1 boot-resource.fex
这样可以修改整个卷的数据，但是如何修改boot-resource.fex里bootlogo.bmp，或者如何将新的bootlogo.bmp打包生成boot-resource.fex文件，然后再用上面命令来更新卷数据

# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00100000 00040000 "boot0"
mtd1: 00300000 00040000 "uboot"
mtd2: 00100000 00040000 "secure_storage"
mtd3: 0fb00000 00040000 "sys"

mtd分为4个分区，mtd3关联ubi0
ubi0分了7个卷

UBI version:                    1
Count of UBI devices:           1
UBI control device major/minor: 10:123
Present UBI devices:            ubi0

ubi0
Volumes count:                           8
Logical eraseblock size:                 258048 bytes, 252.0 KiB
Total amount of logical eraseblocks:     1004 (259080192 bytes, 247.0 MiB)
Amount of available logical eraseblocks: 0 (0 bytes)
Maximum count of volumes                 128
Count of bad physical eraseblocks:       0
Count of reserved physical eraseblocks:  40
Current maximum erase counter value:     2
Minimum input/output unit size:          4096 bytes
Character device major/minor:            244:0
Present volumes:                         0, 1, 2, 3, 4, 5, 6, 7

Volume ID:   0 (on ubi0)
Type:        static
Alignment:   1
Size:        66 LEBs (17031168 bytes, 16.2 MiB)
Data bytes:  16777216 bytes (16.0 MiB)
State:       OK
Name:        mbr
Character device major/minor: 244:1
-----------------------------------
Volume ID:   1 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        69 LEBs (17805312 bytes, 16.9 MiB)
State:       OK
Name:        boot-resource
Character device major/minor: 244:2
-----------------------------------
Volume ID:   2 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        5 LEBs (1290240 bytes, 1.2 MiB)
State:       OK
Name:        env
Character device major/minor: 244:3
-----------------------------------
Volume ID:   3 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        5 LEBs (1290240 bytes, 1.2 MiB)
State:       OK
Name:        env-redund
Character device major/minor: 244:4
-----------------------------------
Volume ID:   4 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        70 LEBs (18063360 bytes, 17.2 MiB)
State:       OK
Name:        boot
Character device major/minor: 244:5
-----------------------------------
Volume ID:   5 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        732 LEBs (188891136 bytes, 180.1 MiB)
State:       OK
Name:        rootfs
Character device major/minor: 244:6
-----------------------------------
Volume ID:   6 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        5 LEBs (1290240 bytes, 1.2 MiB)
State:       OK
Name:        dsp0
Character device major/minor: 244:7
-----------------------------------
Volume ID:   7 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        8 LEBs (2064384 bytes, 1.9 MiB)
State:       OK
Name:        UDISK
Character device major/minor: 244:8

我想挂载ubi0_1卷（boot-resource）修改里面的开机logo

# mount -t ubifs ubi0_1 /mnt/boot
mount: mounting ubi0_1 on /mnt/boot failed: Invalid argument

挂载失败！

ubi0_5 (rootfs)可以挂载，ubi0_7 （UDisk）也可以挂载。
其他卷都无法挂载。