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