Merge tag 'bitmain-soc-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mani...
[sfrench/cifs-2.6.git] / Documentation / hwmon / ltc4215
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
25 of the possible addresses are unfriendly to probing. You will have to
26 instantiate the devices explicitly.
27
28 Example: the following will load the driver for an LTC4215 at address 0x44
29 on I2C bus #0:
30 $ modprobe ltc4215
31 $ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device
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