projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 72f5de92 IS |
1 | Kernel driver ltc4215 |
| 2 | ===================== | |
| 3 | ||
| 4 | Supported chips: | |
| b04f2f7d | 5 | |
| 72f5de92 | 6 | * Linear Technology LTC4215 |
| b04f2f7d | 7 | |
| 72f5de92 | 8 | Prefix: 'ltc4215' |
| b04f2f7d | 9 | |
| 72f5de92 | 10 | Addresses scanned: 0x44 |
| b04f2f7d | 11 | |
| 72f5de92 | 12 | Datasheet: |
| b04f2f7d MCC |
13 | |
| 14 | http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1006,C1163,P17572,D12697 | |
| 72f5de92 IS |
15 | |
| 16 | Author: Ira W. Snyder <[email protected]> | |
| 17 | ||
| 18 | ||
| 19 | Description | |
| 20 | ----------- | |
| 21 | ||
| 22 | The LTC4215 controller allows a board to be safely inserted and removed | |
| 23 | from a live backplane. | |
| 24 | ||
| 25 | ||
| 26 | Usage Notes | |
| 27 | ----------- | |
| 28 | ||
| 29 | This driver does not probe for LTC4215 devices, due to the fact that some | |
| 2d2a7cff JD |
30 | of the possible addresses are unfriendly to probing. You will have to |
| 31 | instantiate the devices explicitly. | |
| 72f5de92 IS |
32 | |
| 33 | Example: the following will load the driver for an LTC4215 at address 0x44 | |
| b04f2f7d MCC |
34 | on I2C bus #0:: |
| 35 | ||
| 36 | $ modprobe ltc4215 | |
| 37 | $ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device | |
| 72f5de92 IS |
38 | |
| 39 | ||
| 40 | Sysfs entries | |
| 41 | ------------- | |
| 42 | ||
| 43 | The LTC4215 has built-in limits for overvoltage, undervoltage, and | |
| 44 | undercurrent warnings. This makes it very likely that the reference | |
| 45 | circuit will be used. | |
| 46 | ||
| b04f2f7d | 47 | ======================= ========================= |
| 72f5de92 IS |
48 | in1_input input voltage |
| 49 | in2_input output voltage | |
| 50 | ||
| 51 | in1_min_alarm input undervoltage alarm | |
| 52 | in1_max_alarm input overvoltage alarm | |
| 53 | ||
| 54 | curr1_input current | |
| 55 | curr1_max_alarm overcurrent alarm | |
| 56 | ||
| 57 | power1_input power usage | |
| 58 | power1_alarm power bad alarm | |
| b04f2f7d | 59 | ======================= ========================= |