diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 19:56:51 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 19:56:51 -0700 |
commit | 7aefd944f038c7469571adb37769cb6f3924ecfa (patch) | |
tree | f0a8dc23633b6bbbc4f0bff932f332e847fb6c1b /Documentation/hwmon/ltc4260.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/ltc4260.rst')
-rw-r--r-- | Documentation/hwmon/ltc4260.rst | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/hwmon/ltc4260.rst b/Documentation/hwmon/ltc4260.rst new file mode 100644 index 000000000000..4c335b6a51d1 --- /dev/null +++ b/Documentation/hwmon/ltc4260.rst @@ -0,0 +1,64 @@ +Kernel driver ltc4260 +===================== + +Supported chips: + + * Linear Technology LTC4260 + + Prefix: 'ltc4260' + + Addresses scanned: - + + Datasheet: + + http://cds.linear.com/docs/en/datasheet/4260fc.pdf + +Author: Guenter Roeck <linux@roeck-us.net> + + +Description +----------- + +The LTC4260 Hot Swap controller allows a board to be safely inserted +and removed from a live backplane. + + +Usage Notes +----------- + +This driver does not probe for LTC4260 devices, since there is no register +which can be safely used to identify the chip. You will have to instantiate +the devices explicitly. + +Example: the following will load the driver for an LTC4260 at address 0x10 +on I2C bus #1:: + + $ modprobe ltc4260 + $ echo ltc4260 0x10 > /sys/bus/i2c/devices/i2c-1/new_device + + +Sysfs entries +------------- + +Voltage readings provided by this driver are reported as obtained from the ADC +registers. If a set of voltage divider resistors is installed, calculate the +real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the +value of the divider resistor against the measured voltage and R2 is the value +of the divider resistor against Ground. + +Current reading provided by this driver is reported as obtained from the ADC +Current Sense register. The reported value assumes that a 1 mOhm sense resistor +is installed. If a different sense resistor is installed, calculate the real +current by dividing the reported value by the sense resistor value in mOhm. + +======================= ======================= +in1_input SOURCE voltage (mV) +in1_min_alarm Undervoltage alarm +in1_max_alarm Overvoltage alarm + +in2_input ADIN voltage (mV) +in2_alarm Power bad alarm + +curr1_input SENSE current (mA) +curr1_alarm SENSE overcurrent alarm +======================= ======================= |