I am running the SPI code on the panda board and I want to know which function in the code is responsible for detecting the device when it's hot plugged.
Can somebody with the background of embedded systems, Linux device drivers and/or spi please answer my question?
This is the line in your code that does the magic:
1286 MODULE_DEVICE_TABLE(of, omap_mcspi_of_match);
Process:
1. Driver for each device exposes its information using the API MODULE_DEVICE_TABLE. Each device has a unique vendor Id and device Id.
2. At compilation time, the build process extracts this information out of the driver and builds a table.
3. When the device is plugged in, the kernel checks this device table to see if any driver is
available for the particular Vendor/Device Id. If yes then it loads that driver and initializes the device.
Read following articles for more info:
来源：https://stackoverflow.com/questions/22777644/detect-the-presence-of-a-device-when-its-hot-plugged-in-linux