dmikushin/chpivsopidts

A comparison of CherryPi PC H6 stock Android 3.10.65 DTS against OrangePi 3 5.4.65 Armbian

A comparison of CherryPi PC H6 stock Android 3.10.65 DTS against OrangePi 3 5.4.65 Armbian

Problem

Fix the stock Android DTS to compile with the new kernel:

./dtc -I dts -O dtb -f sun50iw6-cherrypi.dts -o sun50iw6-cherrypi.dtb

Currenly, there are lots of warnings, e.g.:

sun50iw6-cherrypi.dts:2515.11-2532.5: Warning (unique_unit_address): /soc@03000000/usbc0@0: duplicate unit-address (also used in node /soc@03000000/usbc1@0)
sun50iw6-cherrypi.dts:2515.11-2532.5: Warning (unique_unit_address): /soc@03000000/usbc0@0: duplicate unit-address (also used in node /soc@03000000/usbc2@0)
sun50iw6-cherrypi.dts:2560.11-2567.5: Warning (unique_unit_address): /soc@03000000/usbc1@0: duplicate unit-address (also used in node /soc@03000000/usbc2@0)

Recovery

We modify the original boot.cmd, in order to introduce the recovery option. With the following U-boot command, an old working version of device tree is used instead of the broken one:

setenv recovery=recovery.dtb

CherryPi H6 GPIO Pinout

OrangePi 3 (Allwinner H6)

Current state

In dts folder we made the following changes to the reference Orange Pi device tree:

• Enabling UART interface on GPIO pins (apparently, the only one UART interface that could work on GPIO pins; there is also r_uart interface, but we could not get it to work)
• Disabling interfaces we are not using in our CherryPi application, such as HDMI and bluetooth

Further reading

Device Tree Customization