Hello. I’m trying to bind the device driver made myself. My Device Tree is follows: [common.dtsi] spi@7000d400 { /* it alias to ‘spi0’ */ status = “okay”; reg = <0x0>; nvidia,enable-hw-based-cs; nvidia,rx-clk-tap-delay = <7>; }; [eeprom-manager.dtsi] / { eeprom-manager { bus@0 { …

hello t.hirose, please check the API calls, i.e. EXPORT_SYMBOL_GPL(...) your user-space application may call those APIs to access your driver. thanks

hello t.hirose, assume you would like to add your own driver to the linux kernel, you may also review Kconfig for adding the configuration. please also make sure you’d specify the driver configure into Makefile for building kernel images. thanks

Hello JerryChang. I already got .o file and .ko file. I wonder why the kernel don’t call my driver’s ‘probe’ function. SPI is not ‘plug and play’ device. In this case, Don’t the kernel use ‘probe’ function? How to bind the kernel and select the driver from the information in Device Tree? Thank …

hello t.hirose, please confirm you’d update kernel image correctly, for example, there’re two ways to update kernel image, you might also refer to Flashing a Specific Partition to have partition update by enable the flash script. i.e. $ sudo ./flash.sh -r -k DTB jetson-nano-emmc mmcblk0p1 th…

Hello JerryChang. I will try it, thank you. But my DTB settings are reflected the folder ‘/proc/’, and my modules .ko .o files are loaded correctly. If my driver probed, it will show ‘m93l_spi_probe’ by ‘printk’. Please tell me the confirmation method that my driver is probed. Thank you.

Hello. My driver appears in folder ‘/sys/bus/spi/drivers/’. But It has not loaded by udev yet. I would like to use Jetson Nano for embedded environment, so the driver must be loaded automatically. The driver is developped on Host Computer used VMWare. Kernel, Device tree and my driver compiles …

Hello, JerryChang. Thank you for your advice. But I have not resolved the probrem. My driver is in ‘/sys/bus/spi/drivers/’, and the driver’s description is in ‘/proc/device-tree/eeprom-manager/bus@0/’. The ‘lsmod’ command was not list my driver. So I think my driver has not binded and not recogn…

hello t.hirose, are you compile your SPI driver as kernel module or built-in driver?

Hello JerryChang. I compiled my driver for kernel module. (.ko file)

hello t.hirose, you may execute below command manually to load the new module, for example, sudo insmod <path_to_sensor_drive_file>

How to bind my driver?

Robotics & Edge Computing Jetson Systems Jetson Nano

JerryChang November 9, 2020, 8:38am 11

hello t.hirose,

you may also refer to Topic 83215 for SPI devices driver implementations.
thanks

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How to bind my driver?

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