Commit bbec6129 authored by Wolfram Sang's avatar Wolfram Sang
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i2c: testunit: describe fwnode based instantiation 



The testunit can also be instantiated via firmware nodes. Give a
devicetree node as an example.

Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
parent 45c03c65

Documentation/i2c/slave-testunit-backend.rst

+12 −0
Original line number Diff line number Diff line
@@ -20,6 +20,18 @@ Instantiating the device is regular. Example for bus 0, address 0x30:: 


  # echo "slave-testunit 0x1030" > /sys/bus/i2c/devices/i2c-0/new_device



Or using firmware nodes. Here is a devicetree example (note this is only a

debug device, so there are no official DT bindings)::



  &i2c0	{

        ...



	testunit@30 {

		compatible = "slave-testunit";

		reg = <(0x30 | I2C_OWN_SLAVE_ADDRESS)>;

	};

  };



After that, you will have the device listening. Reading will return a single

byte. Its value is 0 if the testunit is idle, otherwise the command number of

the currently running command.