1 .. SPDX-License-Identifier: GPL-2.0-or-later
3 Kernel driver sbtsi_temp
8 * Sideband interface (SBI) Temperature Sensor Interface (SB-TSI)
9 compliant AMD SoC temperature device.
13 Addresses scanned: This driver doesn't support address scanning.
15 To instantiate this driver on an AMD CPU with SB-TSI
16 support, the i2c bus number would be the bus connected from the board
17 management controller (BMC) to the CPU. The i2c address is specified in
18 Section 6.3.1 of the SoC register reference: The SB-TSI address is normally
19 98h for socket 0 and 90h for socket 1, but it could vary based on hardware
22 Datasheet: The SB-TSI interface and protocol is available as part of
23 the open source SoC register reference at:
25 https://www.amd.com/system/files/TechDocs/56255_OSRR.pdf
27 The Advanced Platform Management Link (APML) Specification is
30 http://developer.amd.com/wordpress/media/2012/10/41918.pdf
32 Author: Kun Yi <kunyi@google.com>
37 The SBI temperature sensor interface (SB-TSI) is an emulation of the software
38 and physical interface of a typical 8-pin remote temperature sensor (RTS) on
39 AMD SoCs. It implements one temperature sensor with readings and limit
40 registers encode the temperature in increments of 0.125 from 0 to 255.875.
41 Limits can be set through the writable thresholds, and if reached will trigger
42 corresponding alert signals.