1 .. SPDX-License-Identifier: GPL-2.0
2
3 Kernel driver mp2975
4 ====================
5
6 Supported chips:
7
8 * MPS MP12254
9
10 Prefix: 'mp2975'
11
12 Author:
13
14 Vadim Pasternak <vadimp@nvidia.com>
15
16 Description
17 -----------
18
19 This driver implements support for Monolithic
20 vendor dual-loop, digital, multi-phase control
21
22 This device:
23
24 - Supports up to two power rail.
25 - Provides 8 pulse-width modulations (PWMs), a
26 to 8-phase operation for rail 1 and up to 4-
27 2.
28 - Supports two pages 0 and 1 for telemetry and
29 configuration.
30 - Can configured VOUT readout in direct or VID
31 setting of different formats on rails 1 and
32 protocols are available: VR13 mode with 5-mV
33 10-mV DAC, IMVP9 mode with 5-mV DAC.
34
35 Device supports:
36
37 - SVID interface.
38 - AVSBus interface.
39
40 Device complaint with:
41
42 - PMBus rev 1.3 interface.
43
44 Device supports direct format for reading outp
45 input and output power and temperature.
46 Device supports linear format for reading inpu
47 Device supports VID and direct formats for rea
48 The below VID modes are supported: VR12, VR13,
49
50 The driver provides the next attributes for th
51
52 - for current in: input, maximum alarm;
53 - for current out input, maximum alarm and hig
54 - for phase current: input and label.
55 attributes.
56
57 The driver exports the following attributes vi
58
59 - 'n' is number of telemetry pages (from 1 to
60 - 'k' is number of configured phases (from 1 t
61 - indexes 1, 1*n for "iin";
62 - indexes n+1, n+2 for "iout";
63 - indexes 2*n+1 ... 2*n + k for phases.
64
65 **curr[1-{2n}]_alarm**
66
67 **curr[{n+1}-{n+2}]_highest**
68
69 **curr[1-{2n+k}]_input**
70
71 **curr[1-{2n+k}]_label**
72
73 The driver provides the next attributes for th
74
75 - for voltage in: input, high critical thresho
76 from page 0;
77 - for voltage out: input, low and high critica
78 critical alarms, from pages 0 and 1;
79
80 The driver exports the following attributes vi
81
82 - 'n' is number of telemetry pages (from 1 to
83 - indexes 1 for "iin";
84 - indexes n+1, n+2 for "vout";
85
86 **in[1-{2n+1}]_crit**
87
88 **in[1-{2n+1}]_crit_alarm**
89
90 **in[1-{2n+1}]_input**
91
92 **in[1-{2n+1}]_label**
93
94 **in[2-{n+1}]_lcrit**
95
96 **in[2-{n+1}1_lcrit_alarm**
97
98 The driver provides the next attributes for th
99
100 - for power in alarm and input.
101 - for power out: highest and input.
102
103 The driver exports the following attributes vi
104
105 - 'n' is number of telemetry pages (from 1 to
106 - indexes 1 for "pin";
107 - indexes n+1, n+2 for "pout";
108
109 **power1_alarm**
110
111 **power[2-{n+1}]_highest**
112
113 **power[1-{2n+1}]_input**
114
115 **power[1-{2n+1}]_label**
116
117 The driver provides the next attributes for th
118
119
120 **temp1_crit**
121
122 **temp1_crit_alarm**
123
124 **temp1_input**
125
126 **temp1_max**
127
128 **temp1_max_alarm**
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