Jetson agx xavier add spi3 channel

[wang.biao4]

We’re trying to porting temperature sensor.The following are the steps of setting.

1. Use spi3 , add devices tree:
   
2. Include dtsi into the tegra194-p2888-0001-p2822-0000-common.dtsi
   
   
3. Add the driver file into misc folder
   
   
   
   
   
   
   Uploading: 3.png…
   
   4.Change the Makefile
   
   5.Change the spi3 pin_mux
   
   
   
   When we read the spi3, there is none signal wave on the /cs/mosi/miso/sck.
   Please help to check, thanks

[ShaneCCC]

Could you confirm the PINs by below command?

sudo cat /sys/kernel/debug/tegra_pinctrl_reg | grep -i spi

[wang.biao4]

Pins show below, please check:

[ShaneCCC]

Looks like spi3_* reg didn’t as expect.
Try using devmem to program those REG to try.