Commit | Line | Data |
---|---|---|
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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 | |
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25 | of the possible addresses are unfriendly to probing. You will have to |
26 | instantiate the devices explicitly. | |
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27 | |
28 | Example: the following will load the driver for an LTC4215 at address 0x44 | |
29 | on I2C bus #0: | |
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30 | $ modprobe ltc4215 |
31 | $ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device | |
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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 |