1 .. SPDX-License-Identifier: GPL-2.0-or-later 1 .. SPDX-License-Identifier: GPL-2.0-or-later
2 2
3 Kernel driver pt5161l 3 Kernel driver pt5161l
4 ===================== 4 =====================
5 5
6 Supported chips: 6 Supported chips:
7 7
8 * Astera Labs PT5161L 8 * Astera Labs PT5161L
9 9
10 Prefix: 'pt5161l' 10 Prefix: 'pt5161l'
11 11
12 Addresses scanned: I2C 0x20 - 0x27 12 Addresses scanned: I2C 0x20 - 0x27
13 13
14 Datasheet: Not publicly available. 14 Datasheet: Not publicly available.
15 15
16 Authors: Cosmo Chou <cosmo.chou@quantatw.com> 16 Authors: Cosmo Chou <cosmo.chou@quantatw.com>
17 17
18 Description 18 Description
19 ----------- 19 -----------
20 20
21 This driver implements support for temperature 21 This driver implements support for temperature monitoring of Astera Labs
22 PT5161L series PCIe retimer chips. 22 PT5161L series PCIe retimer chips.
23 23
24 This driver implementation originates from the 24 This driver implementation originates from the CSDK available at
25 https://github.com/facebook/openbmc/tree/heliu 25 https://github.com/facebook/openbmc/tree/helium/common/recipes-lib/retimer-v2.14
26 The communication protocol utilized is based o 26 The communication protocol utilized is based on the I2C/SMBus standard.
27 27
28 Sysfs entries 28 Sysfs entries
29 ---------------- 29 ----------------
30 30
31 ================ ============================= 31 ================ ==============================================
32 temp1_input Measured temperature (in mill 32 temp1_input Measured temperature (in millidegrees Celsius)
33 ================ ============================= 33 ================ ==============================================
34 34
35 Debugfs entries 35 Debugfs entries
36 ---------------- 36 ----------------
37 37
38 ================ ============================= 38 ================ ===============================
39 fw_load_status Firmware load status 39 fw_load_status Firmware load status
40 fw_ver Firmware version of the retim 40 fw_ver Firmware version of the retimer
41 heartbeat_status Heartbeat status 41 heartbeat_status Heartbeat status
42 ================ ============================= 42 ================ ===============================
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