CPU

：

RK3399

系统：

Android 7.1.2

为了降低成本，主板将

Type-C

改为

MicroUSB

接口，节省了

fusb302

芯片

参考

Rockchip

的官方文档第

4

部分：

Micro USB2.0 OTG DTS

配置

RKDocs/common/usb/Rockchip-Developer-Guide-Linux4.4-RK3399-USB-DTS-CN.pdf

&tcphy0 {

status =

"disabled"

;

};

&u2phy0 {

status =

"okay"

;

/* Micro USB2 PHY

删除了

extcon

属性

*/

otg-vbus-gpios = ;

/* Vbus GPIO

配置

*/

u2phy0_otg: otg-port {

/*

文档中错误写成了

u2phy1_otg */

status =

"okay"

;

};

......

};

&usbdrd3_0 {

extcon = ;

/* Micro USB3

控制器的

extcon

属性引用

u2phy0 */

status =

"okay"

;

};

&usbdrd_dwc3_0 {

dr_mode =

"otg"

;

/* Micro USB3

控制器的

dr_mode

配置为

otg */

maximum-speed =

"high-speed"

;

/* maximum-speed

属性配置为

high-speed */

phys = ;

/* phys

属性只引用

USB2 PHY

节点

*/

phy-names =

"usb2-phy"

;

status =

"okay"

;

};

按照文档中说明，修改这部分就可以了，但是编译内核部分烧录后，不能进安卓系统，串口一直循环打印如下：

[

9.878630

] init: Starting service

'surfaceflinger'

...

[

10.294620

] init: Service

'surfaceflinger'

(pid

532

) killed by signal

6

[

10.294664

] init: Service

'surfaceflinger'

(pid

532

) killing any children

in

process group

[

10.294709

] init: Service

'zygote'

is

being killed...

[

10.356365

] init: Service

'zygote'

(pid

254

) killed by signal

9

[

10.356441

] init: Service

'zygote'

(pid

254

) killing any children

in

process group

[

10.356634

] init: write_file: Unable to open

'/sys/android_power/request_state'

: No such file or directory

[

10.356778

] init: write_file: Unable to write to

'/sys/power/state'

: Invalid argument

[

10.356805

] init: Service

'audioserver'

is

being killed...

[

10.357239

] init: Service

'cameraserver'

is

being killed...

[

10.357327

] init: Service

'media'

is

being killed...

[

10.357454

] init: Service

'netd'

is

being killed...

[

10.358943

] init: Starting service

'zygote'

...

[

10.364342

] init: Service

'audioserver'

(pid

299

) killed by signal

9

[

10.364427

] init: Service

'audioserver'

(pid

299

) killing any children

in

process group

[

10.365879

] init: Starting service

'audioserver'

...

[

10.369573

] init: Service

'netd'

(pid

310

) killed by signal

9

[

10.369677

] init: Service

'netd'

(pid

310

) killing any children

in

process group

[

10.370582

] init: Untracked pid

575

killed by signal

9

[

10.374127

] init: Service

'media'

(pid

297

) killed by signal

9

[

10.374192

] init: Service

'media'

(pid

297

) killing any children

in

process group

[

10.375119

] init: Service

'cameraserver'

(pid

300

) killed by signal

9

[

10.375158

] init: Service

'cameraserver'

(pid

300

) killing any children

in

process group

[

10.376450

] init: Starting service

'media'

...

[

10.378976

] init: Starting service

'cameraserver'

...

[

10.382610

] init: couldn

't write 580 to /dev/cpuset/camera-daemon/tasks: No such file or directory

[

12.079202

] init: Starting service

'netd'

...

开始怀疑是因为没有全部编译的问题，但是全部编译烧录后，还是不能开机，一直提示找不到

drm device

，串口一直循环打印如下：

__bionic_open_tzdata: couldn

't find any tzdata when looking for GMT!

Starting recovery (pid

185

) on Fri Jan

18

08

:

52

:

30

2013

bootmode = emmc

recovery filesystem table

=========================

0

/mnt/internal_sd vfat /dev/block/platform/fe330000.sdhci/by-name/user

0

1

/mnt/external_sd vfat /dev/block/mmcblk0p1

0

2

/system ext4 /dev/block/platform/fe330000.sdhci/by-name/system

0

3

/cache ext4 /dev/block/platform/fe330000.sdhci/by-name/cache

0

4

/metadata ext4 /dev/block/platform/fe330000.sdhci/by-name/metadata

0

5

/data ext4 /dev/block/platform/fe330000.sdhci/by-name/userdata

0

6

/cust ext4 /dev/block/platform/fe330000.sdhci/by-name/cust

0

7

/custom ext4 /dev/block/platform/fe330000.sdhci/by-name/custom

0

8

/misc emmc /dev/block/platform/fe330000.sdhci/by-name/misc

0

9

/uboot emmc /dev/block/platform/fe330000.sdhci/by-name/uboot

0

10

/charge emmc /dev/block/platform/fe330000.sdhci/by-name/charge

0

11

/resource emmc /dev/block/platform/fe330000.sdhci/by-name/resource

0

12

/parameter emmc /dev/block/platform/fe330000.sdhci/by-name/parameter

0

13

/boot emmc /dev/block/platform/fe330000.sdhci/by-name/boot

0

14

/recovery emmc /dev/block/platform/fe330000.sdhci/by-name/recovery

0

15

/backup emmc /dev/block/platform/fe330000.sdhci/by-name/backup

0

16

/trust emmc /dev/block/platform/fe330000.sdhci/by-name/trust

0

17

/baseparameter emmc /dev/block/platform/fe330000.sdhci/by-name/baseparameter

0

18

/frp emmc /dev/block/platform/fe330000.sdhci/by-name/frp

0

19

/tmp ramdisk ramdisk

0

emmc_point

is

/dev/block/mmcblk1

sd_point

is

(

null

)

sd_point_2

is

(

null

)

I:InternalSD_ROOT: /mnt/internal_sd

I:ExternalSD_ROOT: /mnt/external_sd

read cmdline

[

4.309235

] fs_mgr: Warning: unknown flag resize

I:Boot command: boot-recovery

I:Got arguments

from

boot message

[

4.311229

] fs_mgr: Warning: unknown flag resize

=== start

void

dumpCmdArgs(

int

,

char

**):

296

===

argv[

0

] =  recovery.

argv[

1

] =  --wipe_all.

locale

is

[en_US]

stage

is

[]

reason

is

[(

null

)]

cannot find/open a drm device: No such file or directory

cannot open fb0: No such file or directory

[

4.352842

] init: Service

'recovery'

(pid

185

) killed by signal

11

[

4.352952

] init: Service

'recovery'

(pid

185

) killing any children

in

process group

[

9.358734

] init: Starting service

'recovery'

...

查看

dts

文件，里面还有一个地方

&cdn_dp

使用了

fusb0

，屏蔽此处即可开机

&cdn_dp {

status =

"disabled"

;

extcon = ;

phys = ;

};

最后建议把

i2c

中与

fusb302

通讯的部分也

disable

掉，此处不改也没有问题，只是

i2c

不通，但可以正常开机。

fusb0: fusb30x@

22

{

compatible =

"fairchild,fusb302"

;

reg = <

0x22

>;

pinctrl-names =

"default"

;

pinctrl-

0

= ;

int

-n-gpios =

2

GPIO_ACTIVE_HIGH>;

vbus-5v-gpios =

26

GPIO_ACTIVE_HIGH>;

status =

"disabled"

;

};