diff mbox series

[v1,1/7] dt-bindings: thermal: Add binding for Tegra30 thermal sensor

Message ID 20210510223816.18565-2-digetx@gmail.com
State Not Applicable, archived
Headers show
Series Add driver for NVIDIA Tegra30 SoC Thermal sensor | expand

Checks

Context Check Description
robh/checkpatch warning total: 0 errors, 1 warnings, 78 lines checked
robh/dt-meta-schema success
robh/dtbs-check success

Commit Message

Dmitry Osipenko May 10, 2021, 10:38 p.m. UTC 
All NVIDIA Tegra30 SoCs have on-chip sensors which monitor temperature
and voltage of the SoC. Sensors also controls CPU x2 freq throttle and
emits emergency shutdown signal. TSENSOR has has two separate channels
for each sensor placed in a different parts of the SoC. Add binding for
the sensor hardware.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 .../thermal/nvidia,tegra30-tsensor.yaml       | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml

Comments

Rob Herring May 17, 2021, 9:35 p.m. UTC | #1 
On Tue, 11 May 2021 01:38:10 +0300, Dmitry Osipenko wrote:
> All NVIDIA Tegra30 SoCs have on-chip sensors which monitor temperature
> and voltage of the SoC. Sensors also controls CPU x2 freq throttle and
> emits emergency shutdown signal. TSENSOR has has two separate channels
> for each sensor placed in a different parts of the SoC. Add binding for
> the sensor hardware.
> 
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
>  .../thermal/nvidia,tegra30-tsensor.yaml       | 78 +++++++++++++++++++
>  1 file changed, 78 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml
> 

Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml b/Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml
new file mode 100644
index 000000000000..6182090d313c
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml
@@ -0,0 +1,78 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/nvidia,tegra30-tsensor.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVIDIA Tegra30 Thermal Sensor
+
+maintainers:
+  - Dmitry Osipenko <digetx@gmail.com>
+  - Jon Hunter <jonathanh@nvidia.com>
+  - Thierry Reding <thierry.reding@gmail.com>
+
+description: |
+  TSENSOR provides thermal and voltage sensors which monitor temperature
+  and voltage of the chip. Sensors are placed across the die to gauge the
+  temperature of the whole chip. The TSENSOR module:
+
+    Generates an interrupt to SW to lower temperature via DVFS on reaching
+    a certain thermal/voltage threshold.
+
+    Generates a signal to the CAR to reduce CPU frequency by half on reaching
+    a certain thermal/voltage threshold.
+
+    Generates a signal to the PMC when the temperature reaches dangerously high
+    levels to reset the chip and sets a flag in the PMC.
+
+  TSENSOR has two channels which monitor two different spots of the SoC.
+
+properties:
+  compatible:
+    const: nvidia,tegra30-tsensor
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#thermal-sensor-cells":
+    const: 1
+
+  "#cooling-cells":
+    const: 2
+
+  assigned-clock-parents: true
+  assigned-clock-rates: true
+  assigned-clocks: true
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+  - interrupts
+  - "#thermal-sensor-cells"
+  - "#cooling-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    thermal-sensor@70014000 {
+      compatible = "nvidia,tegra30-tsensor";
+      reg = <0x70014000 0x500>;
+      interrupts = <0 102 4>;
+      clocks = <&clk 100>;
+      resets = <&rst 100>;
+
+      #thermal-sensor-cells = <1>;
+      #cooling-cells = <2>;
+    };