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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-01 13:51:48 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-01 13:51:48 -0700 |
commit | 26f31fb936042459d481557a83bda7a3f4d61906 (patch) | |
tree | 1d871ee1c82896355ad0aef6eea8dbd601d8169d /Documentation/hwmon/ltc4260 | |
parent | 0c8cfbade0e9bef5637907ed00c7b81bc86ad359 (diff) | |
parent | f76992b00a4111fc4679b0b2d49fe75f05c2b04d (diff) | |
download | linux-26f31fb936042459d481557a83bda7a3f4d61906.tar.bz2 |
Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
- New drivers for ADC128D818, LTC2945, LTC4260, and LTC4222
- Added support for LTM4676 to ltc2978 driver
- Converted several drivers to use devm_hwmon_device_register_with_groups
- Various cleanup in several drivers
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (36 commits)
hwmon: (pmbus/ltc2978) Add support for LTM4676
hwmon: (pmbus/ltc2978) Add new chip ID for LTC2974
hwmon: Do not accept invalid name attributes
hwmon: (max6639) Use SIMPLE_DEV_PM_OPS macro
hwmon: (lm95245) Make temp2_crit_hyst read-only
hwmon: (lm95245) Convert to use devm_hwmon_device_register_with_groups
hwmon: (lm95245) Drop useless debug message
hwmon: (lm95245) Fix hysteresis temperatures
hwmon: (max6639) Convert to use devm_hwmon_device_register_with_groups
hwmon: (max6639) Introduce local dev variable, and reduce noisiness
hwmon: (max6650) Introduce local 'dev' variable
hwmon: (max6650) Drop error message after memory allocation failures
hwmon: (max6650) Convert to use devm_hwmon_device_register_with_groups
hwmon: (max6650) Rearrange code to no longer require forward declarations
hwmon: (ltc4215) Convert to devm_hwmon_device_register_with_groups
hwmon: (coretemp) Convert to use devm_hwmon_device_register_with_groups
hwmon: (coretemp) Allocate platform data with devm_kzalloc
hwmon: (coretemp) Use sysfs_create_group to create sysfs attributes
hwmon: (ltc4245) Remove devicetree conditionals
hwmon: (ltc4245) Drop debug messages
...
Diffstat (limited to 'Documentation/hwmon/ltc4260')
-rw-r--r-- | Documentation/hwmon/ltc4260 | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/Documentation/hwmon/ltc4260 b/Documentation/hwmon/ltc4260 new file mode 100644 index 000000000000..c4ff4ad998b2 --- /dev/null +++ b/Documentation/hwmon/ltc4260 @@ -0,0 +1,56 @@ +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 |