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