Re: [PATCH 3/3] i2c: expose adapter probe and remove probed functions

From: David Lechner
Date: Fri Sep 16 2016 - 17:09:12 EST

On 09/16/2016 04:03 PM, Wolfram Sang wrote:

The intended use of these functions is for LEGO MINDSTORMS sensors. These
are hot-plugable I2C devices. When a sensor is connected, i2c_adapter_probe()
is called to automatically configure the sensor. When the sensor is
disconnected, i2c_adapter_remove_probed() is called to remove the
automatically configured device.

How do you detect the hot-plug events?

There are "port" drivers that do this. An I2C adapter is assigned to each port via device-tree or platform data struct.

Port driver code if you are interested:

In particular, here is where we call the new i2c_adapter_probe() function: