projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 72f5de92 IS |
1 | Kernel driver ltc4215 |
| 2 | ===================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | * Linear Technology LTC4215 | |
| 6 | Prefix: 'ltc4215' | |
| 7 | Addresses scanned: 0x44 | |
| 8 | Datasheet: | |
| 9 | http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1006,C1163,P17572,D12697 | |
| 10 | ||
| 11 | Author: Ira W. Snyder <iws@ovro.caltech.edu> | |
| 12 | ||
| 13 | ||
| 14 | Description | |
| 15 | ----------- | |
| 16 | ||
| 17 | The LTC4215 controller allows a board to be safely inserted and removed | |
| 18 | from a live backplane. | |
| 19 | ||
| 20 | ||
| 21 | Usage Notes | |
| 22 | ----------- | |
| 23 | ||
| 24 | This driver does not probe for LTC4215 devices, due to the fact that some | |
| 2d2a7cff JD |
25 | of the possible addresses are unfriendly to probing. You will have to |
| 26 | instantiate the devices explicitly. | |
| 72f5de92 IS |
27 | |
| 28 | Example: the following will load the driver for an LTC4215 at address 0x44 | |
| 29 | on I2C bus #0: | |
| 2d2a7cff JD |
30 | $ modprobe ltc4215 |
| 31 | $ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device | |
| 72f5de92 IS |
32 | |
| 33 | ||
| 34 | Sysfs entries | |
| 35 | ------------- | |
| 36 | ||
| 37 | The LTC4215 has built-in limits for overvoltage, undervoltage, and | |
| 38 | undercurrent warnings. This makes it very likely that the reference | |
| 39 | circuit will be used. | |
| 40 | ||
| 41 | in1_input input voltage | |
| 42 | in2_input output voltage | |
| 43 | ||
| 44 | in1_min_alarm input undervoltage alarm | |
| 45 | in1_max_alarm input overvoltage alarm | |
| 46 | ||
| 47 | curr1_input current | |
| 48 | curr1_max_alarm overcurrent alarm | |
| 49 | ||
| 50 | power1_input power usage | |
| 51 | power1_alarm power bad alarm |