[PATCH 1/4] dt-bindings: Add Raspberry Pi's RP1 ADC

Stanimir Varbanov
2025-09-25T00:05:25Z

Document dt-bindings for Raspberry Pi's RP1 ADC.

Signed-off-by: Stanimir Varbanov <svarbanov@suse.de>
---
.../bindings/hwmon/raspberrypi,rp1-adc.yaml | 46 +++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/raspberrypi,rp1-adc.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/raspberrypi,rp1-adc.yaml b/Documentation/devicetree/bindings/hwmon/raspberrypi,rp1-adc.yaml
new file mode 100644
index 000000000000..5266b253fd2b
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/raspberrypi,rp1-adc.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/raspberrypi,rp1-adc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rasberry Pi RP1 ADC device
+
+maintainers:
+ - Stanimir Varbanov <svarbanov@suse.de>
+
+description: |
+ The RP1 ADC is a five input successive-approximation ADC with 12-bit
+ resolution (ENOB 9.5-bit) at 500kSPS. It has four external inputs
+ and one internal temperature sensor.
+
+properties:
+ compatible:
+ const: raspberrypi,rp1-adc
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ vref-supply:
+ description:
+ Reference voltage regulator 3.3V.
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - vref-supply
+
+additionalProperties: false
+
+examples:
+ - |
+ adc@400c8000 {
+ compatible = "raspberrypi,rp1-adc";
+ reg = <0x400c8000 0x4000>;
+ clocks = <&rp1_clocks 30>;
+ vref-supply = <&rp1_vdd_3v3>;
+ };
--
2.47.0