Rock3/Ubuntu/device-tree-overlays
ROCK 3 > Ubuntu > Device Tree Overlays
Contents
- 1 Device Tree Overlays: ROCK 3
- 1.1 Introduction
- 1.2 File uEnv.txt
- 1.3 RK3566/RK3568 Available Overlay (ROCK 3 A, ROCK 3 B, Radxa E23, Radxa E25)
- 1.3.1 rk3568-can1-m0
- 1.3.2 rk3568-can1-m1
- 1.3.3 rk3568-i2c2-m0
- 1.3.4 rk3568-i2c3-m0
- 1.3.5 rk3568-pwm1-m0
- 1.3.6 rk3568-pwm1-m1
- 1.3.7 rk3568-pwm2-m0
- 1.3.8 rk3568-pwm2-m1
- 1.3.9 rk3568-pwm8-m0-fan
- 1.3.10 rk3568-pwm9-m0
- 1.3.11 rk3568-pwm12-m0
- 1.3.12 rk3568-pwm12-m1
- 1.3.13 rk3568-pwm13-m0
- 1.3.14 rk3568-pwm13-m1
- 1.3.15 rk3568-pwm14-m0
- 1.3.16 rk3568-pwm14-m1
- 1.3.17 rk3568-pwm15-m0
- 1.3.18 rk3568-pwm15-m1
- 1.3.19 rk3568-spi3-m1-cs0-spidev
- 1.3.20 rk3568-uart0
- 1.3.21 rk3568-uart3-m0
- 1.3.22 rk3568-uart3-m1
- 1.3.23 rk3568-uart5-m1
- 1.3.24 rk3568-uart7-m1
- 1.3.25 rk3568-uart8-m1
- 1.3.26 rk3568-uart9-m1
- 1.3.27 rk3568-w1-gpio
Device Tree Overlays: ROCK 3
Introduction
This page discribes device tree overlays on ROCK 3. Device tree overlays is controlled by file /boot/uEnv.txt.
You can do the setting for ROCK 3 in your /boot/uEnv.txt, which should cause your ROCK 3 to do your wanted things after a reboot.
In /boot/dtbs/$(uname -r)/rockchip/overlay/ you will find many *.dtbo files. The loader will merge the selected *.dtbo files by reading the file /boot/uEnv.txt.
File uEnv.txt
/boot/uEnv.txt contents:
overlays=rk3568-uart0 rk3568-can1-m0 rk3568-pwm13-m0 param_w1_pin=GPIO3_A5
Add names of overlays you want to activate to overlays= line in /boot/uEnv.txt, separated with spaces.
Add required parameters with their values to /boot/uEnv.txt, one per line.
Add optional parameters with their values to /boot/uEnv.txt if you want to change the default value, one per line.
U-Boot Environment Variable
- verbosity
Kernel log level: 1~7
verbosity=7
- rootfstype
root filesystem type: ext4
rootfstype=ext4
- fdtfile
Kernel device tree name with the prefix, rockchip/
fdtfile=rockchip/rk3566-radxa-cm3-io.dtb
- extraargs
- Driver module parameters
extraargs=mem=512MB max_loop=8
RK3566/RK3568 Available Overlay (ROCK 3 A, ROCK 3 B, Radxa E23, Radxa E25)
- rk3568-can1-m0 rk3568-can1-m1
- rk3568-i2c2-m0 rk3568-i2c3-m0
- rk3568-pwm1-m0 rk3568-pwm1-m1 rk3568-pwm2-m0 rk3568-pwm2-m1 rk3568-pwm8-m0-fan rk3568-pwm9-m0 rk3568-pwm12-m0 rk3568-pwm12-m1 rk3568-pwm13-m0 rk3568-pwm13-m1 rk3568-pwm14-m0 rk3568-pwm14-m1 k3568-pwm15-m0 rk3568-pwm15-m1
- rk3568-spi3-m1-cs0-spidev
- rk3568-uart0 rk3568-uart3-m0 rk3568-uart3-m1 rk3568-uart5-m1 rk3568-uart7-m1 rk3568-uart8-m1 rk3568-uart9-m1
- rk3568-w1-gpio
rk3568-can1-m0
Activates CAN bus 1 M0
CAN1 M0 pins: CAN1_RX_M0, CAN1_TX_M0
Usage: Add the item "rk3568-can1-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-can1-m0
rk3568-can1-m1
Activates CAN bus 1 M1
CAN1 M0 pins: CAN1_RX_M1, CAN1_TX_M1
Usage: Add the item "rk3568-can1-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-can1-m1
rk3568-i2c2-m0
Activates I2C bus 2 M0
I2C2 M0 pins: I2C2_SDA_M0, I2C2_SCL_M0
Usage: Add the item "rk3568-i2c2-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-i2c2-m0
rk3568-i2c3-m0
Activates I2C bus 3 M0
I2C3 M0 pins: I2C3_SDA_M0, I2C3_SCL_M0
Usage: Add the item "rk3568-i2c3-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-i2c3-m0
rk3568-pwm1-m0
Activates PWM1_M0
Usage: Add the item "rk3568-pwm1-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm1-m0
rk3568-pwm1-m1
Activates PWM1_M1
Usage: Add the item "rk3568-pwm1-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm1-m1
rk3568-pwm2-m0
Activates PWM2_M0
Usage: Add the item "rk3568-pwm2-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm2-m0
rk3568-pwm2-m1
Activates PWM2_M1
Usage: Add the item "rk3568-pwm2-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm2-m1
rk3568-pwm8-m0-fan
Activates PWM8_M0
Usage: Add the item "rk3568-pwm8-m0-fan" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm8-m0-fan
rk3568-pwm9-m0
Activates PWM9_M0
Usage: Add the item "rk3568-pwm9-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm9-m0
rk3568-pwm12-m0
Activates PWM12_M0
Usage: Add the item "rk3568-pwm12-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm12-m0
rk3568-pwm12-m1
Activates PWM12_M1
Usage: Add the item "rk3568-pwm12-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm12-m1
rk3568-pwm13-m0
Activates PWM13_M0
Usage: Add the item "rk3568-pwm13-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm13-m0
rk3568-pwm13-m1
Activates PWM13_M1
Usage: Add the item "rk3568-pwm13-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm13-m1
rk3568-pwm14-m0
Activates PWM14_M0
Usage: Add the item "rk3568-pwm14-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm14-m0
rk3568-pwm14-m1
Activates PWM14_M1
Usage: Add the item "rk3568-pwm14-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm14-m1
rk3568-pwm15-m0
Activates PWM15_M0
Usage: Add the item "k3568-pwm15-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=k3568-pwm15-m0
rk3568-pwm15-m1
Activates PWM15_M1
Usage: Add the item "rk3568-pwm15-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-pwm15-m1
rk3568-spi3-m1-cs0-spidev
Activates SPI3 M0 (/dev/spidev3.0)
SPI3 M1 pins: SPI3_CS0_M1, SPI3_CLK_M1, SPI3_MOSI_M1, SPI3_MISO_M1
Usage: Add the item "rk3568-spi3-m1-cs0-spidev" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-spi3-m1-cs0-spidev
rk3568-uart0
Activates serial port 0 (/dev/ttyS0)
UART0 pins: UART0_RX, UART0_TX
Usage: Add the item "rk3568-uart0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-uart0
rk3568-uart3-m0
Activates serial port 3 on M0 (/dev/ttyS3)
UART3 M0 pins: UART3_RX_M0, UART3_TX_M0
Usage: Add the item "rk3568-uart3-m0" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-uart3-m0
rk3568-uart3-m1
Activates serial port 3 on M1 (/dev/ttyS3)
UART3 M1 pins: UART3_RX_M1, UART3_TX_M1
Usage: Add the item "rk3568-uart3-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-uart3-m1
rk3568-uart5-m1
Activates serial port 5 on M1 (/dev/ttyS5)
UART5 M1 pins: UART5_RX_M1, UART5_TX_M1
Usage: Add the item "rk3568-uart5-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-uart5-m1
rk3568-uart7-m1
Activates serial port 7 on M1 (/dev/ttyS7)
UART7 M1 pins: UART7_RX_M1, UART7_TX_M1
Usage: Add the item "rk3568-uart7-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-uart7-m1
rk3568-uart8-m1
Activates serial port 8 on M1 (/dev/ttyS8)
UART8 M1 pins: UART8_RX_M1, UART8_TX_M1
Usage: Add the item "rk3568-uart8-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-uart8-m1
rk3568-uart9-m1
Activates serial port 9 on M1 (/dev/ttyS9)
UART9 M1 pins: UART9_RX_M1, UART9_TX_M1
Usage: Add the item "rk3568-uart9-m1" to "overlays=" line in /boot/uEnv.txt.
overlays=rk3568-uart9-m1
rk3568-w1-gpio
Activates 1-Wire GPIO master
Requires an external pull-up resistor on the data pin
- Parameters:
- param_w1_pin (pin)
- Data pin for 1-Wire master
- Optional
- Default: GPIO3_A5
- param_w1_pin (pin)
Usage: Add the item "rk3568-w1-gpio" to "overlays=" line in /boot/uEnv.txt. Also param_w1_pin is needed.
overlays=rk3568-w1-gpio param_w1_pin=GPIO3_A5