`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 fu***302芯片
参考 Rockchip 的官方文档第4部分：Micro USB2.0 OTG DTS配置
RKDocs/common/u***/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 = <&gpio3 RK_PC6GPIO_ACtiVE_HIGH>; /* Vbus GPIO配置 */ u2phy0_otg: otg-port { /* 文档中错误写成了u2phy1_otg */
status = "okay";
};
......
};
&u***drd3_0 {
extcon = <&u2phy0>; /* Micro USB3控制器的extcon属性引用u2phy0 */
status = "okay";
};
&u***drd_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 = <&u2phy0_otg>; /* phys 属性只引用USB2 PHY节点 */
phy-names = "u***2-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: Startingservice '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: Startingservice '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: Startingservice '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: Untrackedpid 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: Startingservice 'media'... [ 10.378976] init: Startingservice 'cameraserver'... [ 10.382610] init: couldn't write 580 to/dev/cpuset/camera-daemon/tasks: No such file or directory [ 12.079202] init: Startingservice '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 anytzdata when looking for GMT! Starting recovery(pid 185) on Fri Jan 18 08:52:30 2013 bootmode = emmc
recoveryfilesystem table =========================
0 /mnt/internal_sdvfat /dev/block/platform/fe330000.sdhci/by-name/user 0 1 /mnt/external_sdvfat /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 /baseparameteremmc /dev/block/platform/fe330000.sdhci/by-name/baseparameter 0 18 /frp emmc/dev/block/platform/fe330000.sdhci/by-name/frp 0 19 /tmp ramdiskramdisk 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 adrm 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: Startingservice 'recovery'...
查看 dts 文件，里面还有一个地方 &cdn_dp 使用了 fu***0，屏蔽此处即可开机
&cdn_dp {
status = "disabled";
extcon = <&fu***0>;
phys = <&tcphy0_dp>;
};
最后建议把 i2c 中与 fu***302 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。
fu***0: fu***30x@22 {
compatible = "fairchild,fu***302";
reg = <0x22>;
pinctrl-names = "default";
pinctrl-0 = <&fu***0_int>;
int-n-gpios =<&gpio1 2 GPIO_ACTIVE_HIGH>; vbus-5v-gpios = <&gpio4 26 GPIO_ACTIVE_HIGH>;
status = "disabled";
};
`
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