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| -rw-r--r-- | Documentation/i2c/slave-testunit-backend.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/i2c/slave-testunit-backend.rst b/Documentation/i2c/slave-testunit-backend.rst index d3ab5944877d..3743188ecfc7 100644 --- a/Documentation/i2c/slave-testunit-backend.rst +++ b/Documentation/i2c/slave-testunit-backend.rst @@ -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. |