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+.. SPDX-License-Identifier: GPL-2.0
+
+===================
+I2C/SMBus Subsystem
+===================
+
+Introduction
+============
+
+.. toctree::
+   :maxdepth: 1
+
+   summary
+   i2c-protocol
+   smbus-protocol
+   instantiating-devices
+   busses/index
+   i2c-topology
+   muxes/i2c-mux-gpio
+   i2c-sysfs
+   i2c-address-translators
+
+Writing device drivers
+======================
+
+.. toctree::
+   :maxdepth: 1
+
+   writing-clients
+   dev-interface
+   dma-considerations
+   fault-codes
+   functionality
+
+Debugging
+=========
+
+.. toctree::
+   :maxdepth: 1
+
+   gpio-fault-injection
+   i2c-stub
+
+Slave I2C
+=========
+
+.. toctree::
+   :maxdepth: 1
+
+   slave-interface
+   slave-eeprom-backend
+   slave-testunit-backend
+
+Advanced topics
+===============
+
+.. toctree::
+   :maxdepth: 1
+
+   ten-bit-addresses
+
+Legacy documentation
+====================
+
+.. toctree::
+   :maxdepth: 1
+
+   old-module-parameters