The Renesas RZ/G3E SoC includes a Thermal Sensor Unit (TSU) block designed
to measure the junction temperature. The device provides real-time temperature
measurements for thermal management, utilizing a single dedicated channel
(channel 1) for temperature sensing.

Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
---
v1 -> v2:
 * Fix reg property specifier to get rid of yamlint warnings
 * Fix IRQ name to reflect TSU expectations

v2 -> v3:
 * Remove useless 'renesas,tsu-operating-mode' property 
 
 .../thermal/renesas,r9a09g047-tsu.yaml        | 113 ++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml

diff --git a/Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml b/Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml
new file mode 100644
index 000000000000..46f0646d1c4f
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml
@@ -0,0 +1,113 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/renesas,r9a09g047-tsu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/G3E Temperature Sensor Unit (TSU)
+
+maintainers:
+  - John Madieu <john.madieu.xa@bp.renesas.com>
+
+description:
+  The Temperature Sensor Unit (TSU) is an integrated thermal sensor that
+  monitors the chip temperature on the Renesas RZ/G3E SoC. The TSU provides
+  real-time temperature measurements for thermal management.
+
+properties:
+  compatible:
+    const: renesas,r9a09g047-tsu
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  interrupts:
+    description: |
+      Interrupt specifiers for the TSU:
+      - S12TSUADI1: Conversion complete interrupt signal (pulse)
+      - S12TSUADCMPI1: Comparison result interrupt signal (level)
+
+  interrupt-names:
+    items:
+      - const: adi
+      - const: adcmpi
+
+  "#thermal-sensor-cells":
+    const: 0
+
+  renesas,tsu-calibration-sys:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: |
+      Phandle to the system controller (sys) that contains the TSU
+      calibration values used for temperature calculations.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+  - power-domains
+  - interrupts
+  - interrupt-names
+  - "#thermal-sensor-cells"
+  - renesas,tsu-calibration-sys
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/renesas,r9a09g047-cpg.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    tsu: thermal@14002000 {
+        compatible = "renesas,r9a09g047-tsu";
+        reg = <0x14002000 0x1000>;
+        clocks = <&cpg CPG_MOD 0x10a>;
+        resets = <&cpg 0xf8>;
+        power-domains = <&cpg>;
+        interrupts = <GIC_SPI 250 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 251 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "adi", "adcmpi";
+        #thermal-sensor-cells = <0>;
+        renesas,tsu-calibration-sys = <&sys>;
+    };
+
+    thermal-zones {
+        cpu-thermal {
+            polling-delay = <1000>;
+            polling-delay-passive = <250>;
+            thermal-sensors = <&tsu>;
+
+            cooling-maps {
+                map0 {
+                    trip = <&target>;
+                    cooling-device = <&cpu0 0 3>, <&cpu1 0 3>,
+                                     <&cpu2 0 3>, <&cpu3 0 3>;
+                    contribution = <1024>;
+                };
+            };
+
+            trips {
+                target: trip-point {
+                    temperature = <95000>;
+                    hysteresis = <1000>;
+                    type = "passive";
+                };
+
+                sensor_crit: sensor-crit {
+                    temperature = <120000>;
+                    hysteresis = <1000>;
+                    type = "critical";
+                };
+            };
+        };
+    };
-- 
2.25.1

On Sat, Mar 15, 2025 at 09:12:12AM +0100, John Madieu wrote:
> The Renesas RZ/G3E SoC includes a Thermal Sensor Unit (TSU) block designed
> to measure the junction temperature. The device provides real-time temperature
> measurements for thermal management, utilizing a single dedicated channel
> (channel 1) for temperature sensing.

Please wrap commit message according to Linux coding style / submission
process (neither too early nor over the limit):
https://elixir.bootlin.com/linux/v6.4-rc1/source/Documentation/process/submitting-patches.rst#L597

Please run scripts/checkpatch.pl and fix reported warnings. After that,
run also 'scripts/checkpatch.pl --strict' and (probably) fix more
warnings. Some warnings can be ignored, especially from --strict run,
but the code here looks like it needs a fix. Feel free to get in touch
if the warning is not clear.

> 
> Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
> ---
> v1 -> v2:
>  * Fix reg property specifier to get rid of yamlint warnings
>  * Fix IRQ name to reflect TSU expectations

... 

> +  interrupts:
> +    description: |
> +      Interrupt specifiers for the TSU:
> +      - S12TSUADI1: Conversion complete interrupt signal (pulse)
> +      - S12TSUADCMPI1: Comparison result interrupt signal (level)

Same problems as before - you need to list and describe items to have
constraints. Otherwise why 5 interrupts are allowed but only two
interrupt-names (test this)?

There is no syntax like above in any other bindings. If you found such,
please share the filename so we can fix it.

> +
> +  interrupt-names:
> +    items:
> +      - const: adi
> +      - const: adcmpi
> +
> +  "#thermal-sensor-cells":
> +    const: 0
> +
> +  renesas,tsu-calibration-sys:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: |
> +      Phandle to the system controller (sys) that contains the TSU
> +      calibration values used for temperature calculations.
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - resets
> +  - power-domains
> +  - interrupts
> +  - interrupt-names
> +  - "#thermal-sensor-cells"
> +  - renesas,tsu-calibration-sys
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/renesas,r9a09g047-cpg.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    tsu: thermal@14002000 {
> +        compatible = "renesas,r9a09g047-tsu";
> +        reg = <0x14002000 0x1000>;
> +        clocks = <&cpg CPG_MOD 0x10a>;
> +        resets = <&cpg 0xf8>;
> +        power-domains = <&cpg>;
> +        interrupts = <GIC_SPI 250 IRQ_TYPE_EDGE_RISING>,
> +                     <GIC_SPI 251 IRQ_TYPE_LEVEL_HIGH>;
> +        interrupt-names = "adi", "adcmpi";
> +        #thermal-sensor-cells = <0>;
> +        renesas,tsu-calibration-sys = <&sys>;
> +    };
> +
> +    thermal-zones {

Drop the node, no need to show how to use provider binding.

Best regards,
Krzysztof