1 .. SPDX-License-Identifier: GPL-2.0
2
3 Kernel driver sg2042-mcu
4 ========================
5
6 Supported chips:
7
8 * Onboard MCU for sg2042
9
10 Addresses scanned: -
11
12 Prefix: 'sg2042-mcu'
13
14 Authors:
15
16 - Inochi Amaoto <inochiama@outlook.com>
17
18 Description
19 -----------
20
21 This driver supprts hardware monitoring for on
22 i2c interface.
23
24 Usage Notes
25 -----------
26
27 This driver does not auto-detect devices. You
28 the devices explicitly.
29 Please see Documentation/i2c/instantiating-dev
30
31 Sysfs Attributes
32 ----------------
33
34 The following table shows the standard entries
35
36 ================= ============================
37 Name Description
38 ================= ============================
39 temp1_input Measured temperature of SoC
40 temp1_crit Critical high temperature
41 temp1_crit_hyst hysteresis temperature resto
42 temp2_input Measured temperature of the
43 ================= ============================
44
45 The following table shows the extra entries su
46 (the MCU device is in i2c subsystem):
47
48 ================= ======= ====================
49 Name Perm Description
50 ================= ======= ====================
51 reset_count RO Reset count of the S
52 uptime RO Seconds after the MC
53 reset_reason RO Reset reason for the
54 repower_policy RW Execution policy whe
55 ================= ======= ====================
56
57 ``repower_policy``
58 The repower is triggered when the temperatur
59 the hysteresis temperature after triggering
60 reaching the critical temperature.
61 The valid values for this entry are "repower
62 leave the SoC down when the triggering repow
63 boot the SoC.
64
65 Debugfs Interfaces
66 ------------------
67
68 If debugfs is available, this driver exposes s
69 data in ``/sys/kernel/debug/sg2042-mcu/*/``.
70
71 ================= ======= ====================
72 Name Format Description
73 ================= ======= ====================
74 firmware_version 0x%02x firmware version of
75 pcb_version 0x%02x version number of th
76 board_type 0x%02x identifiers for the
77 mcu_type %d type of the MCU: 0 i
78 ================= ======= ====================
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