additional-devices.md

Use additional devices

The kernels shipped with this build the 4.4 and mainline do support dynamic enabling of devices via borrowing of_overlays from Raspberry PI.

This requires to use at least the 0.9.x >= releases.

Enable 100Mbit Ethernet interface (Rock64)

The extra ethernet interface is accessible on Pi-P5+ Bus which you can access with https://www.pine64.org/?product=rock64-stereo-audio-dac-add-on-board.

sudo systemctl start kernel-overlay@fast-ethernet
sudo systemctl enable kernel-overlay@fast-ethernet

Manually editting device-tree

It is possible to manually edit currently running device-tree with dtedit command.

EDP display (RockPro64) (BETA)

1. Enable EDP display device-tree nodes:

   sudo dtedit

   Add the following text at the end of file:

   / {
     pwm@ff420000 {
       status = "okay";
     };
   
     lcd-backlight {
       status = "okay";
     };
   
     edp-panel {
       status = "okay";
     };
   
     edp@ff970000 {
       status = "okay";
     };
   };
   

   Exit editor, and confirm that with YES and reboot:

   Use overlay or not?
   Say YES or NO or DROP:
   YES

   You have to re-run dtedit if you update the kernel.

2. To disable overlays you have to do:

   sudo dtedit
   # close editor
   # and select DROP

Pine64 display and touchscreen (RockPro64) (BETA)

1. Enable display and touchscreen device-tree nodes:

   sudo dtedit

   Add the following text at the end of file:

   / {
     pwm@ff420000 {
       status = "okay";
     };
   
     lcd-backlight {
       status = "okay";
     };
   
     dsi@ff960000 {
       status = "okay";
     };
   
     i2c@ff3d0000 {
       gt9xx@14 {
         status = "okay";
       };
     };
   };
   

   Exit editor, and confirm that with YES and reboot:

   Use overlay or not?
   Say YES or NO or DROP:
   YES

   You have to re-run dtedit if you update the kernel.

2. To disable overlays you have to do:

   sudo dtedit
   # close editor
   # and select DROP

Help wanted

Contribute here to add information about different devices that might be interesting for the users: SPI, I2C, UART, GPIOs.