1 Kernel driver ina3221
2 =====================
3
4 Supported chips:
5
6 * Texas Instruments INA3221
7
8 Prefix: 'ina3221'
9
10 Addresses: I2C 0x40 - 0x43
11
12 Datasheet: Publicly available at the Texas
13
14 https://www.ti.com/
15
16 Author: Andrew F. Davis <afd@ti.com>
17
18 Description
19 -----------
20
21 The Texas Instruments INA3221 monitors voltage
22 side of up to three D.C. power supplies. The I
23 and supply voltage, with programmable conversi
24 and power are calculated host-side from these.
25
26 Sysfs entries
27 -------------
28
29 ======================= ======================
30 in[123]_label Voltage channel labels
31 in[123]_enable Voltage channel enable
32 in[123]_input Bus voltage(mV) channe
33 curr[123]_input Current(mA) measuremen
34 shunt[123]_resistor Shunt resistance(uOhm)
35 curr[123]_crit Critical alert current
36 corresponding alarm wh
37 is above this value
38 curr[123]_crit_alarm Critical alert current
39 curr[123]_max Warning alert current(
40 corresponding alarm wh
41 average is above this
42 curr[123]_max_alarm Warning alert current
43 in[456]_input Shunt voltage(uV) for
44 in7_input Sum of shunt voltage(u
45 in7_label Channel label for sum
46 curr4_input Sum of current(mA) mea
47 (only available when a
48 value for their shunt
49 curr4_crit Critical alert current
50 measurements, activate
51 when the respective cu
52 (only effective when a
53 value for their shunt
54 curr4_crit_alarm Critical alert current
55 current measurements.
56 samples Number of samples usin
57
58 Supports the list of n
59
60 1, 4, 16, 64, 128, 2
61
62 update_interval Data conversion time i
63
64 update_interval = C
65
66 * C: number of enab
67 * S: number of samp
68 * BC: bus-voltage co
69 * SC: shunt-voltage
70
71 Affects both Bus- and
72 Note that setting upda
73 and SC to 140 us (mini
74 ======================= ======================
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