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Difference between revisions of "Rock3/extlinux"

(→‎Common Hardware Interfaces, I2C, PWM, SPI, UART, CAN, etc)
(→‎Common Hardware Interfaces, I2C, PWM, SPI, UART, CAN, etc)
 
(9 intermediate revisions by the same user not shown)
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==== I2C ====
 
==== I2C ====
  
−
To enable I2C-2 (/dev/i2c-2), add item "rk3568-i2c2-m0" to the "overlays=" line.
+
==== PWM ====
  
−
  overlays=rk3568-i2c2-m0
+
==== SPI ====
  
−
To enable I2C-3 (/dev/i2c-3), add item "rk3568-i2c3-m0" to the "overlays=" line.
+
==== UART ====
  
−
  overlays=rk3568-i2c3-m0
+
==== CAN ====
  
−
==== PWM ====
+
            </div> <!--  id="common-hardware-interface-3a" end-->
  
−
===== PWM0 =====
+
            <div id="common-hardware-interface-3b" class="tab-pane">
−
====== Option 1: PWM0-M0 ======
+
−
To enable PWM0-M0, add item "rk3568-pwm0-m0" to the "overlays=" line.
+
  
−
overlays=rk3568-pwm0-m0
+
==== I2C ====
  
−
The related directory <code>/sys/devices/platform/fdd70000.pwm/pwm/pwmchip*</code> will be created.
+
==== PWM ====
−
And you can do the operation in the directory.
+
  
−
====== Option 2: PWM0-M1 ======
+
==== SPI ====
−
To enable PWM0-M0, add item "rk3568-pwm0-m1" to the "overlays=" line.
+
  
−
overlays=rk3568-pwm0-m1
+
==== UART ====
  
−
The related directory <code>/sys/devices/platform/fdd70000.pwm/pwm/pwmchip*</code> will be created.
+
==== CAN ====
  
−
===== PWM1=====
 
−
===== PWM1-M1 =====
 
−
To enable PWM11-M1, add item "rk3568-pwm1-m1" to the "overlays=" line.
 
  
−
  overlays=rk3568-pwm1-m1
+
            </div> <!-- id="common-hardware-interface-3b" end-->
 +
            <div id="common-hardware-interface-3c" class="tab-pane">
  
−
The related directory <code>/sys/devices/platform/fdd70010.pwm/pwm/pwmchip*</code> will be created.
+
==== I2C ====
  
−
==== SPI ====
+
To enable I2C-3 (/dev/i2c-3), add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-i2c2-m0.dtbo" to the "fdtovlays " line.
  
−
==== UART ====
+
  fdtoverlays  /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-i2c3-m0.dtbo
−
System default enable uart2-m0 (/dev/ttyS2) to be debug console.  
+
  
−
  overlays=rk3568-fiq-debugger-uart2m0
+
==== PWM ====
  
−
If you want to enable uart2-m0 (/dev/ttyS2) to be normal console, modify item "rk3568-uart2-m0" to the "overlays=" line.  
+
===== PWM0 =====
 +
====== Option 1: PWM0-M0 ======
 +
To enable PWM0-M0, add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-pwm0-m0.dtbo" to the "fdtoverlays " line.
  
−
  overlays=rk3568-uart2-m0
+
  fdtoverlays /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-pwm0-m0.dtbo
  
−
==== CAN ====
+
The related directory <code>/sys/devices/platform/fdd70000.pwm/pwm/pwmchip*</code> will be created.
 +
And you can do the operation in the directory.
  
−
            </div> <!--  id="common-hardware-interface-3a" end-->
+
====== Option 2: PWM0-M1 ======
 +
To enable PWM0-M0, add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-pwm0-m1.dtbo" to the "fdtoverlays " line.
  
−
            <div id="common-hardware-interface-3b" class="tab-pane">
+
  fdtoverlyas /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-pwm0-m1.dtbo
  
−
==== I2C ====
+
The related directory <code>/sys/devices/platform/fdd70000.pwm/pwm/pwmchip*</code> will be created.
−
 
+
−
==== PWM ====
+
  
 
==== SPI ====
 
==== SPI ====
 +
To enable spi3 (/dev/spidev3.0), add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-spi3-m0-cs0-spidev.dtbo" to the "fdtovlays " line.
 +
 +
fdtoverlays  /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-spi3-m0-cs0-spidev.dtbo
  
 
==== UART ====
 
==== UART ====
 +
System default enable uart2-m0 to be debug console.
  
−
==== CAN ====
+
  fdtoverlays  /dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-fiq-debugger-uart2m0.dtbo
  
 +
If you want to enable uart2-m0 (/dev/ttyS2) to be normal uart, modify item "/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-uart2-m0.dtbo" to the "fdtoverlays " line.
  
−
            </div> <!-- id="common-hardware-interface-3b" end-->
+
  fdtoverlays  /dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-uart2-m0.dtbo
 +
 
 +
==== CAN ====
 +
To enable can (can0), add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-can1-m0.dtbo" to the "fdtovlays " line.
 +
 
 +
fdtoverlays  /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-can1-m0.dtbo
  
 +
            </div><!--  id="common-hardware-interface-3c" end-->
  
 
             <div id="common-hardware-interface-cm3io" class="tab-pane">
 
             <div id="common-hardware-interface-cm3io" class="tab-pane">

Latest revision as of 07:05, 8 November 2022

Common Hardware Interfaces, I2C, PWM, SPI, UART, CAN, etc

This page teaches how to enable overlays in file /boot/extlinux/extlinux.conf. The directory /dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/ includes overlays you can enable, to enable overlay, we just need add an absolute path of overlay after the key word fdtoverlays, there is a space between each overlay and a space between fdtoverlays and overlay's absolute path, for example, 

fdtoverlays  /dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-fiq-debugger-uart2m0.dtbo /dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-disable-npu.dtbo  /dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-spi3-m1-cs0-spidev.dtbo

The examples above indicates that rk3568-fiq-debugger-uart2m0 and rk3568-disable-npu and rk3568-spi3-m1-cs0-spidev and are enabled

To enable I2C, PWM, SPI, UART, CAN, etc, please see RK3566/RK3568 Available Overlay (ROCK 3A, ROCK 3B, Radxa CM3) part of Device Tree Overlays

I2C

PWM

SPI

UART

CAN

I2C

PWM

SPI

UART

CAN

I2C

To enable I2C-3 (/dev/i2c-3), add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-i2c2-m0.dtbo" to the "fdtovlays " line. 

 fdtoverlays  /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-i2c3-m0.dtbo

PWM

PWM0
Option 1: PWM0-M0

To enable PWM0-M0, add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-pwm0-m0.dtbo" to the "fdtoverlays " line. 

  fdtoverlays /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-pwm0-m0.dtbo

The related directory /sys/devices/platform/fdd70000.pwm/pwm/pwmchip* will be created. And you can do the operation in the directory.

Option 2: PWM0-M1

To enable PWM0-M0, add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-pwm0-m1.dtbo" to the "fdtoverlays " line. 

  fdtoverlyas /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-pwm0-m1.dtbo

The related directory /sys/devices/platform/fdd70000.pwm/pwm/pwmchip* will be created.

SPI

To enable spi3 (/dev/spidev3.0), add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-spi3-m0-cs0-spidev.dtbo" to the "fdtovlays " line. 

fdtoverlays  /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-spi3-m0-cs0-spidev.dtbo

UART

System default enable uart2-m0 to be debug console. 

 fdtoverlays  /dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-fiq-debugger-uart2m0.dtbo

If you want to enable uart2-m0 (/dev/ttyS2) to be normal uart, modify item "/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-uart2-m0.dtbo" to the "fdtoverlays " line. 

 fdtoverlays  /dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-uart2-m0.dtbo

CAN

To enable can (can0), add item "/boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-can1-m0.dtbo" to the "fdtovlays " line. 

fdtoverlays  /boot/dtbs/4.19.193-53-rockchip-gc36f859f0a63/rockchip/overlay/rk3568-can1-m0.dtbo

I2C

PWM

SPI

UART

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