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e4db7719 VP |
1 | .. SPDX-License-Identifier: GPL-2.0 |
2 | ||
3 | Kernel driver mp2888 | |
4 | ==================== | |
5 | ||
6 | Supported chips: | |
7 | ||
8 | * MPS MP12254 | |
9 | ||
10 | Prefix: 'mp2888' | |
11 | ||
12 | Author: | |
13 | ||
14 | Vadim Pasternak <vadimp@nvidia.com> | |
15 | ||
16 | Description | |
17 | ----------- | |
18 | ||
19 | This driver implements support for Monolithic Power Systems, Inc. (MPS) | |
20 | vendor dual-loop, digital, multi-phase controller MP2888. | |
21 | ||
22 | This device: supports: | |
23 | ||
24 | - One power rail. | |
25 | - Programmable Multi-Phase up to 10 Phases. | |
26 | - PWM-VID Interface | |
27 | - One pages 0 for telemetry. | |
28 | - Programmable pins for PMBus Address. | |
29 | - Built-In EEPROM to Store Custom Configurations. | |
30 | ||
31 | Device complaint with: | |
32 | ||
33 | - PMBus rev 1.3 interface. | |
34 | ||
35 | Device supports direct format for reading output current, output voltage, | |
36 | input and output power and temperature. | |
37 | Device supports linear format for reading input voltage and input power. | |
38 | ||
39 | The driver provides the next attributes for the current: | |
40 | ||
41 | - for current out input and maximum alarm; | |
42 | - for phase current: input and label. | |
43 | ||
44 | The driver exports the following attributes via the 'sysfs' files, where: | |
45 | ||
46 | - 'n' is number of configured phases (from 1 to 10); | |
47 | - index 1 for "iout"; | |
48 | - indexes 2 ... 1 + n for phases. | |
49 | ||
50 | **curr[1-{1+n}]_input** | |
51 | ||
52 | **curr[1-{1+n}]_label** | |
53 | ||
54 | **curr1_max** | |
55 | ||
56 | **curr1_max_alarm** | |
57 | ||
58 | The driver provides the next attributes for the voltage: | |
59 | ||
60 | - for voltage in: input, low and high critical thresholds, low and high | |
61 | critical alarms; | |
62 | - for voltage out: input and high alarm; | |
63 | ||
64 | The driver exports the following attributes via the 'sysfs' files, where | |
65 | ||
66 | **in1_crit** | |
67 | ||
68 | **in1_crit_alarm** | |
69 | ||
70 | **in1_input** | |
71 | ||
72 | **in1_label** | |
73 | ||
74 | **in1_min** | |
75 | ||
76 | **in1_min_alarm** | |
77 | ||
78 | **in2_alarm** | |
79 | ||
80 | **in2_input** | |
81 | ||
82 | **in2_label** | |
83 | ||
84 | The driver provides the next attributes for the power: | |
85 | ||
86 | - for power in alarm and input. | |
87 | - for power out: cap, cap alarm an input. | |
88 | ||
89 | The driver exports the following attributes via the 'sysfs' files, where | |
90 | - indexes 1 for "pin"; | |
91 | - indexes 2 for "pout"; | |
92 | ||
93 | **power1_alarm** | |
94 | ||
95 | **power1_input** | |
96 | ||
97 | **power1_label** | |
98 | ||
99 | **power2_input** | |
100 | ||
101 | **power2_label** | |
102 | ||
103 | **power2_max** | |
104 | ||
105 | **power2_max_alarm** | |
106 | ||
107 | The driver provides the next attributes for the temperature: | |
108 | ||
109 | **temp1_input** | |
110 | ||
111 | **temp1_max** | |
112 | ||
113 | **temp1_max_alarm** |