mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 22:51:35 +00:00
a076a860ac
An ATR is a device that looks similar to an i2c-mux: it has an I2C slave "upstream" port and N master "downstream" ports, and forwards transactions from upstream to the appropriate downstream port. But it is different in that the forwarded transaction has a different slave address. The address used on the upstream bus is called the "alias" and is (potentially) different from the physical slave address of the downstream chip. Add a helper file (just like i2c-mux.c for a mux or switch) to allow implementing ATR features in a device driver. The helper takes care of adapter creation/destruction and translates addresses at each transaction. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Wolfram Sang <wsa@kernel.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
76 lines
957 B
ReStructuredText
76 lines
957 B
ReStructuredText
.. 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
|
|
|
|
.. only:: subproject and html
|
|
|
|
Indices
|
|
=======
|
|
|
|
* :ref:`genindex`
|