summaryrefslogtreecommitdiffstats
path: root/Documentation/hwmon/sbtsi_temp.rst
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /Documentation/hwmon/sbtsi_temp.rst
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/hwmon/sbtsi_temp.rst')
-rw-r--r--Documentation/hwmon/sbtsi_temp.rst42
1 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/hwmon/sbtsi_temp.rst b/Documentation/hwmon/sbtsi_temp.rst
new file mode 100644
index 0000000000..749f518389
--- /dev/null
+++ b/Documentation/hwmon/sbtsi_temp.rst
@@ -0,0 +1,42 @@
+.. 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.