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diff --git a/Documentation/hwmon/ltc4215.rst b/Documentation/hwmon/ltc4215.rst new file mode 100644 index 000000000000..8d5044d99bab --- /dev/null +++ b/Documentation/hwmon/ltc4215.rst @@ -0,0 +1,59 @@ +Kernel driver ltc4215 +===================== + +Supported chips: + + * Linear Technology LTC4215 + + Prefix: 'ltc4215' + + Addresses scanned: 0x44 + + Datasheet: + + http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1006,C1163,P17572,D12697 + +Author: Ira W. Snyder <iws@ovro.caltech.edu> + + +Description +----------- + +The LTC4215 controller allows a board to be safely inserted and removed +from a live backplane. + + +Usage Notes +----------- + +This driver does not probe for LTC4215 devices, due to the fact that some +of the possible addresses are unfriendly to probing. You will have to +instantiate the devices explicitly. + +Example: the following will load the driver for an LTC4215 at address 0x44 +on I2C bus #0:: + + $ modprobe ltc4215 + $ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device + + +Sysfs entries +------------- + +The LTC4215 has built-in limits for overvoltage, undervoltage, and +undercurrent warnings. This makes it very likely that the reference +circuit will be used. + +======================= ========================= +in1_input input voltage +in2_input output voltage + +in1_min_alarm input undervoltage alarm +in1_max_alarm input overvoltage alarm + +curr1_input current +curr1_max_alarm overcurrent alarm + +power1_input power usage +power1_alarm power bad alarm +======================= ========================= |