1 .. SPDX-License-Identifier: GPL-2.0-or-later
2
3 Kernel driver spd5118
4 =====================
5
6 Supported chips:
7
8 * SPD5118 (JEDEC JESD300) compliant temperat
9
10 JEDEC standard download:
11 https://www.jedec.org/standards-docume
12 (account required)
13
14
15 Prefix: 'spd5118'
16
17 Addresses scanned: I2C 0x50 - 0x57
18
19 Author:
20 Guenter Roeck <linux@roeck-us.net>
21
22
23 Description
24 -----------
25
26 This driver implements support for SPD5118 (JE
27 sensors, which are used on many DDR5 memory mo
28 to prevent memory overheating by automatically
29
30 The driver auto-detects SPD5118 compliant chip
31 using devicetree/firmware nodes.
32
33 A SPD5118 compliant chip supports a single tem
34 minimum, maximum, and critical temperature can
35 for low critical, low, high, and critical thre
36
37
38 Hardware monitoring sysfs entries
39 ---------------------------------
40
41 ======================= ======================
42 temp1_input Temperature (RO)
43 temp1_lcrit Low critical high temp
44 temp1_min Minimum temperature (R
45 temp1_max Maximum temperature (R
46 temp1_crit Critical high temperat
47
48 temp1_lcrit_alarm Temperature low critic
49 temp1_min_alarm Temperature low alarm
50 temp1_max_alarm Temperature high alarm
51 temp1_crit_alarm Temperature critical a
52 ======================= ======================
53
54 Alarm attributes are sticky until read and wil
55 unless the alarm condition still applies.
56
57
58 SPD (Serial Presence Detect) support
59 ------------------------------------
60
61 The driver also supports reading the SPD NVRAM
62 SPD data is available from the 'eeprom' binary
63 chip's I2C device.
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