Messages in this thread | | | Subject | Re: [PATCH 3/3] i2c: expose adapter probe and remove probed functions | From | David Lechner <> | Date | Fri, 16 Sep 2016 16:09:02 -0500 |
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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: - https://github.com/ev3dev/lego-linux-drivers/blob/master/ev3/legoev3_ports_in.c - https://github.com/ev3dev/lego-linux-drivers/blob/master/evb/evb_ports_in.c
In particular, here is where we call the new i2c_adapter_probe() function: https://github.com/ev3dev/lego-linux-drivers/blob/master/evb/evb_ports_in.c#L543
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