linux-kernel - [PATCH linux hwmon-next v3 3/3] dt-bindings: (hwmon/sbtsi

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Date:   Sat,  4 Apr 2020 20:01:18 -0700
From:   Kun Yi <kunyi@...gle.com>
To:     jdelvare@...e.com, linux@...ck-us.net, robh+dt@...nel.org,
        mark.rutland@....com
Cc:     Kun Yi <kunyi@...gle.com>, openbmc@...ts.ozlabs.org,
        joel@....id.au, linux-hwmon@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH linux hwmon-next v3 3/3] dt-bindings: (hwmon/sbtsi_tmep) Add
 SB-TSI hwmon driver bindings

Document device tree bindings for AMD SB-TSI emulated temperature
sensor.

Signed-off-by: Kun Yi <kunyi@...gle.com>
---
 .../devicetree/bindings/hwmon/amd,sbtsi.txt   | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/amd,sbtsi.txt

diff --git a/Documentation/devicetree/bindings/hwmon/amd,sbtsi.txt b/Documentation/devicetree/bindings/hwmon/amd,sbtsi.txt
new file mode 100644
index 000000000000..be7293c43c0e
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/amd,sbtsi.txt
@@ -0,0 +1,26 @@
+* Sideband interface Temperature Sensor Interface (SB-TSI) compliant
+AMD SoC temperature device.
+
+SB Temperature Sensor Interface (SB-TSI) is an SMBus compatible
+interface that reports AMD SoC's Ttcl (normalized temperature),
+and resembles a typical 8-pin remote temperature sensor's I2C interface
+to BMC. The emulated thermal sensor can report temperatures in increments of
+0.125 degrees, ranging from 0 to 255.875.
+
+Required properties:
+- compatible: manufacturer and chip name, should be
+	"amd,sbtsi",
+
+- reg: I2C bus address of the device as 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.
+
+[open source SoC register reference]:
+	https://www.amd.com/system/files/TechDocs/56255_OSRR.pdf
+
+Example:
+
+sbtsi@4c {
+	compatible = "amd,sbtsi";
+	reg = <0x4c>;
+};
-- 
2.26.0.292.g33ef6b2f38-goog