1 .. SPDX-License-Identifier: GPL-2.0 1 .. SPDX-License-Identifier: GPL-2.0
2 2
3 Kernel driver mp2856 3 Kernel driver mp2856
4 ==================== 4 ====================
5 5
6 Supported chips: 6 Supported chips:
7 7
8 * MPS MP2856 8 * MPS MP2856
9 9
10 Prefix: 'mp2856' 10 Prefix: 'mp2856'
11 11
12 * MPS MP2857 12 * MPS MP2857
13 13
14 Prefix: 'mp2857' 14 Prefix: 'mp2857'
15 15
16 Author: 16 Author:
17 17
18 Peter Yin <peter.yin@quantatw.com> 18 Peter Yin <peter.yin@quantatw.com>
19 19
20 Description 20 Description
21 ----------- 21 -----------
22 22
23 This driver implements support for Monolithic 23 This driver implements support for Monolithic Power Systems, Inc. (MPS)
24 vendor dual-loop, digital, multi-phase control 24 vendor dual-loop, digital, multi-phase controller MP2856/MP2857
25 25
26 This device: 26 This device:
27 27
28 - Supports up to two power rail. 28 - Supports up to two power rail.
29 - Supports two pages 0 and 1 for and also page 29 - Supports two pages 0 and 1 for and also pages 2 for configuration.
30 - Can configured VOUT readout in direct or VID 30 - Can configured VOUT readout in direct or VID format and allows
31 setting of different formats on rails 1 and 31 setting of different formats on rails 1 and 2. For VID the following
32 protocols are available: AMD SVI3 mode with 32 protocols are available: AMD SVI3 mode with 5-mV/LSB.
33 33
34 Device supports: 34 Device supports:
35 35
36 - SVID interface. 36 - SVID interface.
37 - AVSBus interface. 37 - AVSBus interface.
38 38
39 Device compliant with: 39 Device compliant with:
40 40
41 - PMBus rev 1.3 interface. 41 - PMBus rev 1.3 interface.
42 42
43 Device supports direct format for reading outp 43 Device supports direct format for reading output current, output voltage,
44 input and output power and temperature. 44 input and output power and temperature.
45 Device supports linear format for reading inpu 45 Device supports linear format for reading input voltage and input power.
46 Device supports VID and direct formats for rea 46 Device supports VID and direct formats for reading output voltage.
47 The below VID modes are supported: AMD SVI3. 47 The below VID modes are supported: AMD SVI3.
48 48
49 The driver provides the following sysfs attrib 49 The driver provides the following sysfs attributes for current measurements:
50 50
51 - indexes 1 for "iin"; 51 - indexes 1 for "iin";
52 - indexes 2, 3 for "iout"; 52 - indexes 2, 3 for "iout";
53 53
54 **curr[1-3]_alarm** 54 **curr[1-3]_alarm**
55 55
56 **curr[1-3]_input** 56 **curr[1-3]_input**
57 57
58 **curr[1-3]_label** 58 **curr[1-3]_label**
59 59
60 The driver provides the following sysfs attrib 60 The driver provides the following sysfs attributes for voltage measurements.
61 61
62 - indexes 1 for "vin"; 62 - indexes 1 for "vin";
63 - indexes 2, 3 for "vout"; 63 - indexes 2, 3 for "vout";
64 64
65 **in[1-3]_crit** 65 **in[1-3]_crit**
66 66
67 **in[1-3]_crit_alarm** 67 **in[1-3]_crit_alarm**
68 68
69 **in[1-3]_input** 69 **in[1-3]_input**
70 70
71 **in[1-3]_label** 71 **in[1-3]_label**
72 72
73 **in[1-3]_lcrit** 73 **in[1-3]_lcrit**
74 74
75 **in[1-3]_lcrit_alarm** 75 **in[1-3]_lcrit_alarm**
76 76
77 The driver provides the following sysfs attrib 77 The driver provides the following sysfs attributes for power measurements.
78 78
79 - indexes 1 for "pin"; 79 - indexes 1 for "pin";
80 - indexes 2, 3 for "pout"; 80 - indexes 2, 3 for "pout";
81 81
82 **power[1-3]_alarm** 82 **power[1-3]_alarm**
83 83
84 **power[1-3]_input** 84 **power[1-3]_input**
85 85
86 **power[1-3]_label** 86 **power[1-3]_label**
87 87
88 The driver provides the following sysfs attrib 88 The driver provides the following sysfs attributes for temperature measurements.
89 89
90 **temp[1-2]_crit** 90 **temp[1-2]_crit**
91 91
92 **temp[1-2]_crit_alarm** 92 **temp[1-2]_crit_alarm**
93 93
94 **temp[1-2]_input** 94 **temp[1-2]_input**
95 95
96 **temp[1-2]_max** 96 **temp[1-2]_max**
97 97
98 **temp[1-2]_max_alarm** 98 **temp[1-2]_max_alarm**
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