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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 19:56:51 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 19:56:51 -0700 |
commit | 7aefd944f038c7469571adb37769cb6f3924ecfa (patch) | |
tree | f0a8dc23633b6bbbc4f0bff932f332e847fb6c1b /Documentation/hwmon/ads7828.rst | |
parent | Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
parent | hwmon: (lm75) Add support for TMP75B (diff) | |
download | linux-dev-7aefd944f038c7469571adb37769cb6f3924ecfa.tar.xz linux-dev-7aefd944f038c7469571adb37769cb6f3924ecfa.zip |
Merge tag 'hwmon-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
- Add driver for Intersil ISL68137 PWM Controller
- Add driver for Lochnagar 2
- Add driver for Infineon IR38064 Voltage Regulator
- Add support for TMP75B to lm75 driver
- Convert documentation to ReST format
- Use request_muxed_region for Super-IO accesses in several drivers
- Add 'samples' attribute to ABI, and start using it
- Add support for custom sysfs attributes to pmbus drivers (used in
ISL68137 driver)
- Introduce HWMON_CHANNEL_INFO macro
- Automated changes:
- Use permission specific [SENSOR_][DEVICE_]ATTR variants
- Fix build warnings due to unused of_device_id structures
- Use HWMON_CHANNEL_INFO macro
- Various minor improvements and fixes
* tag 'hwmon-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (125 commits)
hwmon: (lm75) Add support for TMP75B
dt-bindings: hwmon: Add tmp75b to lm75.txt
hwmon: (s3c) Use dev_get_drvdata()
hwmon: (max6650) Drop call to thermal_cdev_update
docs: hwmon: remove the extension from .rst files
docs: hwmon: convert three docs to ReST format
hwmon: (max6650) add thermal cooling device capability
hwmon: (ina3221) Add voltage conversion time settings
hwmon: (ina3221) Do not read-back to cache reg_config
docs: hwmon: Add an index file and rename docs to *.rst
docs: hwmon: convert remaining files to ReST format
docs: hwmon: misc files: convert to ReST format
docs: hwmon: pmbus files: convert to ReST format
docs: hwmon: k8temp, w83793: convert to ReST format
docs: hwmon: da9052, da9055: convert to ReST format
docs: hwmon: wm831x, wm8350: convert to ReST format
docs: hwmon: dme1737, vt1211: convert to ReST format
docs: hwmon: ads1015: convert to ReST format
docs: hwmon: asc7621: convert to ReST format
docs: hwmon: ibmpowernv: convert to ReST format
...
Diffstat (limited to 'Documentation/hwmon/ads7828.rst')
-rw-r--r-- | Documentation/hwmon/ads7828.rst | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/Documentation/hwmon/ads7828.rst b/Documentation/hwmon/ads7828.rst new file mode 100644 index 000000000000..b830b490cfe4 --- /dev/null +++ b/Documentation/hwmon/ads7828.rst @@ -0,0 +1,65 @@ +Kernel driver ads7828 +===================== + +Supported chips: + + * Texas Instruments/Burr-Brown ADS7828 + + Prefix: 'ads7828' + + Datasheet: Publicly available at the Texas Instruments website: + + http://focus.ti.com/lit/ds/symlink/ads7828.pdf + + * Texas Instruments ADS7830 + + Prefix: 'ads7830' + + Datasheet: Publicly available at the Texas Instruments website: + + http://focus.ti.com/lit/ds/symlink/ads7830.pdf + +Authors: + - Steve Hardy <shardy@redhat.com> + - Vivien Didelot <vivien.didelot@savoirfairelinux.com> + - Guillaume Roguez <guillaume.roguez@savoirfairelinux.com> + +Platform data +------------- + +The ads7828 driver accepts an optional ads7828_platform_data structure (defined +in include/linux/platform_data/ads7828.h). The structure fields are: + +* diff_input: (bool) Differential operation + set to true for differential mode, false for default single ended mode. + +* ext_vref: (bool) External reference + set to true if it operates with an external reference, false for default + internal reference. + +* vref_mv: (unsigned int) Voltage reference + if using an external reference, set this to the reference voltage in mV, + otherwise it will default to the internal value (2500mV). This value will be + bounded with limits accepted by the chip, described in the datasheet. + + If no structure is provided, the configuration defaults to single ended + operation and internal voltage reference (2.5V). + +Description +----------- + +This driver implements support for the Texas Instruments ADS7828 and ADS7830. + +The ADS7828 device is a 12-bit 8-channel A/D converter, while the ADS7830 does +8-bit sampling. + +It can operate in single ended mode (8 +ve inputs) or in differential mode, +where 4 differential pairs can be measured. + +The chip also has the facility to use an external voltage reference. This +may be required if your hardware supplies the ADS7828 from a 5V supply, see +the datasheet for more details. + +There is no reliable way to identify this chip, so the driver will not scan +some addresses to try to auto-detect it. That means that you will have to +statically declare the device in the platform support code. |