mirror of
https://github.com/torvalds/linux.git
synced 2024-11-21 19:41:42 +00:00
docs: misc-devices/pci-endpoint-test.txt: convert to ReST
- use title markups; - mark literal blocks. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/1b1f4e5e57fd2065828cecc9d07afbd247349e94.1592203650.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
parent
3471b9f7e4
commit
8a05eb89cb
@ -1,6 +1,8 @@
|
||||
---------------------------------
|
||||
.. SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
=============================
|
||||
AD525x Digital Potentiometers
|
||||
---------------------------------
|
||||
=============================
|
||||
|
||||
The ad525x_dpot driver exports a simple sysfs interface. This allows you to
|
||||
work with the immediate resistance settings as well as update the saved startup
|
||||
@ -8,9 +10,8 @@ settings. Access to the factory programmed tolerance is also provided, but
|
||||
interpretation of this settings is required by the end application according to
|
||||
the specific part in use.
|
||||
|
||||
---------
|
||||
Files
|
||||
---------
|
||||
=====
|
||||
|
||||
Each dpot device will have a set of eeprom, rdac, and tolerance files. How
|
||||
many depends on the actual part you have, as will the range of allowed values.
|
||||
@ -24,23 +25,22 @@ and may vary greatly on a part-by-part basis. For exact interpretation of
|
||||
this field, please consult the datasheet for your part. This is presented
|
||||
as a hex file for easier parsing.
|
||||
|
||||
-----------
|
||||
Example
|
||||
-----------
|
||||
=======
|
||||
|
||||
Locate the device in your sysfs tree. This is probably easiest by going into
|
||||
the common i2c directory and locating the device by the i2c slave address.
|
||||
the common i2c directory and locating the device by the i2c slave address::
|
||||
|
||||
# ls /sys/bus/i2c/devices/
|
||||
0-0022 0-0027 0-002f
|
||||
|
||||
So assuming the device in question is on the first i2c bus and has the slave
|
||||
address of 0x2f, we descend (unrelated sysfs entries have been trimmed).
|
||||
address of 0x2f, we descend (unrelated sysfs entries have been trimmed)::
|
||||
|
||||
# ls /sys/bus/i2c/devices/0-002f/
|
||||
eeprom0 rdac0 tolerance0
|
||||
|
||||
You can use simple reads/writes to access these files:
|
||||
You can use simple reads/writes to access these files::
|
||||
|
||||
# cd /sys/bus/i2c/devices/0-002f/
|
||||
|
@ -14,6 +14,7 @@ fit into other categories.
|
||||
.. toctree::
|
||||
:maxdepth: 2
|
||||
|
||||
ad525x_dpot
|
||||
eeprom
|
||||
ibmvmc
|
||||
ics932s401
|
||||
|
@ -24,7 +24,7 @@ config AD525X_DPOT
|
||||
AD5271, AD5272, AD5274
|
||||
digital potentiometer chips.
|
||||
|
||||
See Documentation/misc-devices/ad525x_dpot.txt for the
|
||||
See Documentation/misc-devices/ad525x_dpot.rst for the
|
||||
userspace interface.
|
||||
|
||||
This driver can also be built as a module. If so, the module
|
||||
|
@ -58,7 +58,7 @@
|
||||
* AD5272 1 1024 20, 50, 100 (50-TP)
|
||||
* AD5274 1 256 20, 50, 100 (50-TP)
|
||||
*
|
||||
* See Documentation/misc-devices/ad525x_dpot.txt for more info.
|
||||
* See Documentation/misc-devices/ad525x_dpot.rst for more info.
|
||||
*
|
||||
* derived from ad5258.c
|
||||
* Copyright (c) 2009 Cyber Switching, Inc.
|
||||
|
Loading…
Reference in New Issue
Block a user