1 Kernel drivers ltc2947-i2c and ltc2947-spi
2 ==========================================
3
4 Supported chips:
5
6 * Analog Devices LTC2947
7
8 Prefix: 'ltc2947'
9
10 Addresses scanned: -
11
12 Datasheet:
13
14 https://www.analog.com/media/en/techni
15
16 Author: Nuno Sá <nuno.sa@analog.com>
17
18 Description
19 ___________
20
21 The LTC2947 is a high precision power and ener
22 voltage, power, temperature, charge and energy
23 and I2C depending on the chip configuration.
24 The device also measures accumulated quantitie
25 register's to read/set energy related values.
26 independently to have setups like: energy1 acc
27 accumulates if current is positive (to check b
28 example). The device also supports a GPIO pin
29 to control a fan as a function of measured tem
30 active as soon as a temperature reading is hig
31 temp2 channel is used to control this threshol
32 alarms.
33
34 Sysfs entries
35 _____________
36
37 The following attributes are supported. Limits
38 is write-only and all the other attributes are
39
40 ======================= ======================
41 in0_input VP-VM voltage (mV).
42 in0_min Undervoltage threshold
43 in0_max Overvoltage threshold
44 in0_lowest Lowest measured voltag
45 in0_highest Highest measured volta
46 in0_reset_history Write 1 to reset in1 h
47 in0_min_alarm Undervoltage alarm
48 in0_max_alarm Overvoltage alarm
49 in0_label Channel label (VP-VM)
50
51 in1_input DVCC voltage (mV)
52 in1_min Undervoltage threshold
53 in1_max Overvoltage threshold
54 in1_lowest Lowest measured voltag
55 in1_highest Highest measured volta
56 in1_reset_history Write 1 to reset in2 h
57 in1_min_alarm Undervoltage alarm
58 in1_max_alarm Overvoltage alarm
59 in1_label Channel label (DVCC)
60
61 curr1_input IP-IM Sense current (m
62 curr1_min Undercurrent threshold
63 curr1_max Overcurrent threshold
64 curr1_lowest Lowest measured curren
65 curr1_highest Highest measured curre
66 curr1_reset_history Write 1 to reset curr1
67 curr1_min_alarm Undercurrent alarm
68 curr1_max_alarm Overcurrent alarm
69 curr1_label Channel label (IP-IM)
70
71 power1_input Power (in uW)
72 power1_min Low power threshold
73 power1_max High power threshold
74 power1_input_lowest Historical minimum pow
75 power1_input_highest Historical maximum pow
76 power1_reset_history Write 1 to reset power
77 power1_min_alarm Low power alarm
78 power1_max_alarm High power alarm
79 power1_label Channel label (Power)
80
81 temp1_input Chip Temperature (in m
82 temp1_min Low temperature thresh
83 temp1_max High temperature thres
84 temp1_input_lowest Historical minimum tem
85 temp1_input_highest Historical maximum tem
86 temp1_reset_history Write 1 to reset temp1
87 temp1_min_alarm Low temperature alarm
88 temp1_max_alarm High temperature alarm
89 temp1_label Channel label (Ambient
90
91 temp2_min Low temperature thresh
92 temp2_max High temperature thres
93 temp2_min_alarm Low temperature fan co
94 temp2_max_alarm High temperature fan c
95 temp2_label Channel label (TEMPFAN
96
97 energy1_input Measured energy over t
98
99 energy2_input Measured energy over t
100 ======================= ======================
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