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Based on kernel version 3.13. Page generated on 2014-01-20 22:03 EST.

1	Kernel driver ads7828
2	=====================
4	Supported chips:
5	  * Texas Instruments/Burr-Brown ADS7828
6	    Prefix: 'ads7828'
7	    Datasheet: Publicly available at the Texas Instruments website:
8	               http://focus.ti.com/lit/ds/symlink/ads7828.pdf
10	  * Texas Instruments ADS7830
11	    Prefix: 'ads7830'
12	    Datasheet: Publicly available at the Texas Instruments website:
13	               http://focus.ti.com/lit/ds/symlink/ads7830.pdf
15	Authors:
16	        Steve Hardy <shardy@redhat.com>
17	        Vivien Didelot <vivien.didelot@savoirfairelinux.com>
18	        Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>
20	Platform data
21	-------------
23	The ads7828 driver accepts an optional ads7828_platform_data structure (defined
24	in include/linux/platform_data/ads7828.h). The structure fields are:
26	* diff_input: (bool) Differential operation
27	  set to true for differential mode, false for default single ended mode.
29	* ext_vref: (bool) External reference
30	  set to true if it operates with an external reference, false for default
31	  internal reference.
33	* vref_mv: (unsigned int) Voltage reference
34	  if using an external reference, set this to the reference voltage in mV,
35	  otherwise it will default to the internal value (2500mV). This value will be
36	  bounded with limits accepted by the chip, described in the datasheet.
38	 If no structure is provided, the configuration defaults to single ended
39	 operation and internal voltage reference (2.5V).
41	Description
42	-----------
44	This driver implements support for the Texas Instruments ADS7828 and ADS7830.
46	The ADS7828 device is a 12-bit 8-channel A/D converter, while the ADS7830 does
47	8-bit sampling.
49	It can operate in single ended mode (8 +ve inputs) or in differential mode,
50	where 4 differential pairs can be measured.
52	The chip also has the facility to use an external voltage reference.  This
53	may be required if your hardware supplies the ADS7828 from a 5V supply, see
54	the datasheet for more details.
56	There is no reliable way to identify this chip, so the driver will not scan
57	some addresses to try to auto-detect it. That means that you will have to
58	statically declare the device in the platform support code.
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