1 .. SPDX-License-Identifier: GPL-2.0-only 1 .. SPDX-License-Identifier: GPL-2.0-only
2 2
3 Kernel driver mpq8785 3 Kernel driver mpq8785
4 ======================= 4 =======================
5 5
6 Supported chips: 6 Supported chips:
7 7
8 * MPS MPQ8785 8 * MPS MPQ8785
9 9
10 Prefix: 'mpq8785' 10 Prefix: 'mpq8785'
11 11
12 Author: Charles Hsu <ythsu0511@gmail.com> 12 Author: Charles Hsu <ythsu0511@gmail.com>
13 13
14 Description 14 Description
15 ----------- 15 -----------
16 16
17 The MPQ8785 is a fully integrated, PMBus-compa 17 The MPQ8785 is a fully integrated, PMBus-compatible, high-frequency, synchronous
18 buck converter. The MPQ8785 offers a very comp 18 buck converter. The MPQ8785 offers a very compact solution that achieves up to
19 40A output current per phase, with excellent l 19 40A output current per phase, with excellent load and line regulation over a
20 wide input supply range. The MPQ8785 operates 20 wide input supply range. The MPQ8785 operates at high efficiency over a wide
21 output current load range. 21 output current load range.
22 22
23 The PMBus interface provides converter configu 23 The PMBus interface provides converter configurations and key parameters
24 monitoring. 24 monitoring.
25 25
26 The MPQ8785 adopts MPS's proprietary multi-pha 26 The MPQ8785 adopts MPS's proprietary multi-phase digital constant-on-time (MCOT)
27 control, which provides fast transient respons 27 control, which provides fast transient response and eases loop stabilization.
28 The MCOT scheme also allows multiple MPQ8785 d 28 The MCOT scheme also allows multiple MPQ8785 devices to be connected in parallel
29 with excellent current sharing and phase inter 29 with excellent current sharing and phase interleaving for high-current
30 applications. 30 applications.
31 31
32 Fully integrated protection features include o 32 Fully integrated protection features include over-current protection (OCP),
33 over-voltage protection (OVP), under-voltage p 33 over-voltage protection (OVP), under-voltage protection (UVP), and
34 over-temperature protection (OTP). 34 over-temperature protection (OTP).
35 35
36 The MPQ8785 requires a minimal number of readi 36 The MPQ8785 requires a minimal number of readily available, standard external
37 components, and is available in a TLGA (5mmx6m 37 components, and is available in a TLGA (5mmx6mm) package.
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 The driver exports the following attributes vi 43 The driver exports the following attributes via the 'sysfs' files
44 for input voltage: 44 for input voltage:
45 45
46 **in1_input** 46 **in1_input**
47 47
48 **in1_label** 48 **in1_label**
49 49
50 **in1_max** 50 **in1_max**
51 51
52 **in1_max_alarm** 52 **in1_max_alarm**
53 53
54 **in1_min** 54 **in1_min**
55 55
56 **in1_min_alarm** 56 **in1_min_alarm**
57 57
58 **in1_crit** 58 **in1_crit**
59 59
60 **in1_crit_alarm** 60 **in1_crit_alarm**
61 61
62 The driver provides the following attributes f 62 The driver provides the following attributes for output voltage:
63 63
64 **in2_input** 64 **in2_input**
65 65
66 **in2_label** 66 **in2_label**
67 67
68 **in2_alarm** 68 **in2_alarm**
69 69
70 The driver provides the following attributes f 70 The driver provides the following attributes for output current:
71 71
72 **curr1_input** 72 **curr1_input**
73 73
74 **curr1_label** 74 **curr1_label**
75 75
76 **curr1_max** 76 **curr1_max**
77 77
78 **curr1_max_alarm** 78 **curr1_max_alarm**
79 79
80 **curr1_crit** 80 **curr1_crit**
81 81
82 **curr1_crit_alarm** 82 **curr1_crit_alarm**
83 83
84 The driver provides the following attributes f 84 The driver provides the following attributes for temperature:
85 85
86 **temp1_input** 86 **temp1_input**
87 87
88 **temp1_max** 88 **temp1_max**
89 89
90 **temp1_max_alarm** 90 **temp1_max_alarm**
91 91
92 **temp1_crit** 92 **temp1_crit**
93 93
94 **temp1_crit_alarm** 94 **temp1_crit_alarm**
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