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Difference between revisions of "Device-tree-overlays"

(→‎Introduction of ROCK Pi Device Tree Overlays)
(→‎RK3328 Available Overlay (ROCK Pi E))
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** Optional
 
** Optional
 
** Default: GPIO2_D2
 
** Default: GPIO2_D2
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</div>
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=== RK3308 Available Overlay (ROCK Pi S) ===
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<div class="toccolours mw-collapsible mw-collapsed" style="overflow:auto;">
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* rk3308-i2c0, rk3308-i2c1, rk3308-i2c2, rk3308-i2c3
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* rk3308-spi-spidev
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* rk3308-uart0, rk3308-uart1, rk3308-uart2
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* rk3308-pwm1, rk3308-pwm2, rk3308-pwm3
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* rk3308-console-on-uart0, rk3308-console-on-uart1, rk3308-console-on-uart2
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* rk3308-w1-gpio
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* rockpis-waveshare35b-v2, rockpis-waveshare35c
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===== '''rk3328-i2c0''' =====
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===== '''rk3328-i2c1''' =====
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===== '''rk3328-i2c2''' =====
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===== '''rk3328-i2c3''' =====
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===== '''rk3308-spi-spidev''' =====
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===== '''rk3308-uart0''' =====
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===== '''rk3308-uart1''' =====
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===== '''rk3308-uart2''' =====
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===== '''rk3308-pwm1''' =====
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===== '''rk3308-pwm2''' =====
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===== '''rk3308-pwm3''' =====
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===== '''rk3308-console-on-uart0''' =====
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===== '''rk3308-console-on-uart1''' =====
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===== '''rk3308-console-on-uart2''' =====
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===== '''rk3308-w1-gpio''' =====
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===== '''rockpis-waveshare35b-v2''' =====
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===== '''rockpis-waveshare35c''' =====
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</div>
 
</div>

Revision as of 11:45, 18 February 2020


Introduction of ROCK Pi Device Tree Overlays

This document describes ROCK Pi device tree overlays provided in kernel packages.

Platform and Chips

rockchip (Rockchip)

  • rk3399pro
  • rk3328
  • rk3308

usage

Kernel provided DT overlay files are in /boot/dtbs/$(uname -r)/rockchip/overlay/

/boot/uEnv.txt contents: 

 overlays=rk3399pro-i2c2 rk3399pro-console-on-uart2 rk3399pro-pwm0 rk3399pro-w1-gpio rk3399pro-spi-spidev
 param_spidev_spi_bus=1
 param_spidev_max_freq=10000000
 param_w1_pin=GPIO2_A2

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.

RK3399PRO Available Overlay (ROCK Pi N10)

  • rk3399pro-i2c2, rk3399pro-i2c6, rk3399pro-i2c7
  • rk3399pro-spi-spidev
  • rk3399pro-pwm0, rk3399pro-pwm1
  • rk3399pro-uart2, rk3399pro-uart4
  • rk3399pro-console-on-uart2, rk3399pro-console-on-uart4
  • rk3399pro-w1-gpio
rk3399pro-i2c2

Activates I2C bus 2

I2C2 pins (SCL, SDA): GPIO2_A1, GPIO2_A0

Usage: add one line in /boot/uEnv.txt overlays=rk3399pro-i2c2

rk3399pro-i2c6

Activates I2C bus 6

I2C7 pins (SCL, SDA): GPIO2_B2, GPIO2_A1

rk3399pro-i2c7

Activates I2C bus 7

I2C7 pins (SCL, SDA): GPIO2_B0, GPIO2_A7

rk3399pro-spi-spidev

Activates spidev device node (/dev/spidevX.Y) for userspace SPI access, where X is the bus number and Y is the CS number

SPI 1 pins (MOSI, MISO, SCK, CS): GPIO1_B0, GPIO1_A7, GPIO1_B1, GPIO1_B2

Parameters:

  • param_spidev_spi_bus (int)
    • SPI bus to activate SPIdev support on
    • Required
    • Supported values: 0, 1
  • param_spidev_spi_cs (int)
    • SPI chip select number
    • Optional
    • Default: 0
    • Supported values: 0, 1
    • Using chip select 1 requires using "spi-add-cs1" overlay
  • param_spidev_max_freq (int)
    • Maximum SPIdev frequency
    • Optional
    • Default: 10000000
    • Range: 3000 - 100000000
rk3399pro-pwm0

Activates PWM0

rk3399pro-pwm1

Activates PWM1

rk3399pro-uart2

Activates serial port 2 (/dev/ttyS2)

UART2 pins (RXD, TXD): GPIO4_C3, GPIO4_C4

Notice: rk3399pro-uart2 and rk3399pro-console-on-uart2 cannnot be added together in /boot/uEnv.txt.

rk3399pro-uart4

Activates serial port 4 (/dev/ttyS4)

UART4 pins (RXD, TXD): GPIO1_A7, GPIO1_B0

Notice: UART4 cannot be activated together with SPI1 since they share the same pins. Also, rk3399pro-uart4 and rk3399pro-console-on-uart4 cannnot be added together in /boot/uEnv.txt.

rk3399pro-console-on-uart2

Activates debug console on UART2

console pins (RXD, TXD): GPIO4_C3, GPIO4_C4

Notice: rk3399pro-console-on-uart2 and rk3399pro-uart2 cannnot be added together in /boot/uEnv.txt.

rk3399pro-console-on-uart4

Activates debug console on UART4

console pins (RXD, TXD): GPIO1_A7, GPIO1_B0

Notice: rk3399pro-console-on-uart4 and rk3399pro-uart4 cannnot be added together in /boot/uEnv.txt.

rk3399pro-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: GPIO2_A2
rk3399pro-raspberrypi-7-inch-lcd

Activates Raspberry Pi 7-inch LCD

Notice: In term of hardware, use a 15-pin FPC cable to connect RPI LCD to ROCK Pi N10.

For power supply, both 5V pin and GND pin on 5-pin connector on RPI LCD are connected to the 40-pin connector on ROCK Pi N10.

rk3399pro-pcie-gen2

Activates PCIe Gen2 Mode

RK3328 Available Overlay (ROCK Pi E)

  • rk3328-i2c1
  • rk3328-spi-spidev
  • rk3328-uart1, rk3328-uart2
  • rk3328-console-on-uart1, rk3328-console-on-uart2
  • rk3328-w1-gpio
rk3328-i2c1

Activates I2C bus 2

I2C2 pins (SCL, SDA): GPIO2_A1, GPIO2_A0

Usage: add one line in /boot/uEnv.txt

overlays=rk3328-i2c1

rk3328-spi-spidev

Activates spidev device node (/dev/spidevX.Y) for userspace SPI access, where X is the bus number and Y is the CS number

SPI 0 pins (MOSI, MISO, SCK, CS): GPIO3_A1, GPIO3_A2, GPIO3_A0, GPIO3_B0

Parameters:

  • param_spidev_spi_bus (int)
    • SPI bus to activate SPIdev support on
    • Required
    • Supported values: 0
  • param_spidev_spi_cs (int)
    • SPI chip select number
    • Optional
    • Default: 0
    • Supported values: 0
  • param_spidev_max_freq (int)
    • Maximum SPIdev frequency
    • Optional
    • Default: 10000000
    • Range: 3000 - 100000000
rk3328-uart1

Activates serial port 1 (/dev/ttyS1)

UART1 pins (RXD, TXD): GPIO3_A6, GPIO3_A4

Notice: rk3328-uart1 and rk3328-console-on-uart1 cannnot be added together in /boot/uEnv.txt.

rk3328-uart2

Activates serial port 2 (/dev/ttyS2)

UART2 pins (RXD, TXD): GPIO2_A1, GPIO2_A0

Notice: rk3328-uart2 and rk3328-console-on-uart2 cannnot be added together in /boot/uEnv.txt.

rk3328-console-on-uart

Activates debug console on UART1

console pins (RXD, TXD): GPIO3_A6, GPIO3_A4

Notice: rk3328-console-on-uart1 and rk3328-uart1 cannnot be added together in /boot/uEnv.txt.

rk3328-console-on-uart2

Activates debug console on UART2

console pins (RXD, TXD): GPIO2_A1, GPIO2_A0

Notice: rk3328-console-on-uart2 and rk3328-uart2 cannnot be added together in /boot/uEnv.txt.

rk3328-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: GPIO2_D2

RK3308 Available Overlay (ROCK Pi S)

  • rk3308-i2c0, rk3308-i2c1, rk3308-i2c2, rk3308-i2c3
  • rk3308-spi-spidev
  • rk3308-uart0, rk3308-uart1, rk3308-uart2
  • rk3308-pwm1, rk3308-pwm2, rk3308-pwm3
  • rk3308-console-on-uart0, rk3308-console-on-uart1, rk3308-console-on-uart2
  • rk3308-w1-gpio
  • rockpis-waveshare35b-v2, rockpis-waveshare35c
rk3328-i2c0
rk3328-i2c1
rk3328-i2c2
rk3328-i2c3
rk3308-spi-spidev
rk3308-uart0
rk3308-uart1
rk3308-uart2
rk3308-pwm1
rk3308-pwm2
rk3308-pwm3
rk3308-console-on-uart0
rk3308-console-on-uart1
rk3308-console-on-uart2
rk3308-w1-gpio
rockpis-waveshare35b-v2
rockpis-waveshare35c
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