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Message-ID: <20240719173855.53261-2-marius.cristea@microchip.com>
Date: Fri, 19 Jul 2024 20:38:54 +0300
From: <marius.cristea@...rochip.com>
To: <jic23@...nel.org>, <lars@...afoo.de>, <robh+dt@...nel.org>
CC: <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
<linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <marius.cristea@...rochip.com>
Subject: [PATCH v1 1/2] dt-bindings: iio: adc: adding support for PAC194X
From: Marius Cristea <marius.cristea@...rochip.com>
This is the device tree schema for iio driver for
Microchip PAC194X and PAC195X series of Power Monitors with Accumulator.
Signed-off-by: Marius Cristea <marius.cristea@...rochip.com>
---
.../bindings/iio/adc/microchip,pac1944.yaml | 168 ++++++++++++++++++
1 file changed, 168 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/microchip,pac1944.yaml
diff --git a/Documentation/devicetree/bindings/iio/adc/microchip,pac1944.yaml b/Documentation/devicetree/bindings/iio/adc/microchip,pac1944.yaml
new file mode 100644
index 000000000000..e997a4d536e9
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/microchip,pac1944.yaml
@@ -0,0 +1,168 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/microchip,pac1944.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip PAC1944 and PAC1954 Power Monitors with Accumulator
+
+maintainers:
+ - Marius Cristea <marius.cristea@...rochip.com>
+
+description: |
+ This device is part of the Microchip family of Power Monitors with Accumulator.
+ The datasheet for PAC1941_1, PAC1941_1, PAC1942_1, PAC1942_2, PAC1943_1 and PAC1944_1 can be found here:
+ https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/PAC194X-Family-Data-Sheet-DS20006543.pdf
+ The datasheet for PAC1951_1, PAC1951_1, PAC1952_1, PAC1952_2, PAC1953_1 and PAC1954_1 can be found here:
+ https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/PAC195X-Family-Data-Sheet-DS20006539.pdf
+
+properties:
+ compatible:
+ enum:
+ - microchip,pac1941_1
+ - microchip,pac1941_2
+ - microchip,pac1942_1
+ - microchip,pac1942_2
+ - microchip,pac1943_1
+ - microchip,pac1944_1
+ - microchip,pac1951_1
+ - microchip,pac1951_2
+ - microchip,pac1952_1
+ - microchip,pac1952_2
+ - microchip,pac1953_1
+ - microchip,pac1954_1
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ interrupts:
+ maxItems: 2
+
+ slow-io-gpios:
+ description:
+ A GPIO used to trigger a change is sampling rate (lowering the chip power
+ consumption). If configured in SLOW mode, if this pin is forced high,
+ sampling rate is forced to eight samples/second. When it is forced low,
+ the sampling rate is 1024 samples/second unless a different sample rate
+ has been programmed.
+
+ microchip,gpio:
+ type: boolean
+ description:
+ In default mode, this pin is a GPIO input pin. It can be
+ configured to be an output pin, as well as the ALERT2
+ function. This pin is an open-drain configuration and
+ needs a pull-up resistor to VDD.
+
+patternProperties:
+ "^channel@[1-4]+$":
+ type: object
+ $ref: adc.yaml
+ description:
+ Represents the external channels which are connected to the ADC.
+
+ properties:
+ reg:
+ items:
+ minimum: 1
+ maximum: 4
+
+ shunt-resistor-micro-ohms:
+ description:
+ Value in micro Ohms of the shunt resistor connected between
+ the SENSE+ and SENSE- inputs, across which the current is measured.
+ Value is needed to compute the scaling of the measured current.
+
+ microchip,vbus-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ The VBUS could be configured into the following full scale range (FSR)
+ <0> - VBUS has unipolar +32V to 0V FSR (default)
+ <1> - VBUS has bipolar +32V to -32V FSR
+ <2> - VBUS has bipolar +16V to -16V FSR
+ maximum: 2
+
+ microchip,vsense-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ The VSENSE could be configured into the following full scale range (FSR)
+ <0> - VSENSE has unipolar +100 mV to 0V FSR (default)
+ <1> - VSENSE has bipolar +100 mV to -100 mV FSR
+ <2> - VSENSE has bipolar +50 mV to -50 mV FSR
+ maximum: 2
+
+ microchip,accumulation-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ The Hardware Accumulator could be configured to accumulate
+ VPOWER, VSENSE or VBUS
+ <0> - Accumulator accumulates VPOWER (default)
+ <1> - Accumulator accumulates VSENSE
+ <2> - Accumulator accumulates VBUS
+ maximum: 2
+
+ required:
+ - reg
+ - shunt-resistor-micro-ohms
+
+ unevaluatedProperties: false
+
+required:
+ - compatible
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ power-monitor@10 {
+ compatible = "microchip,pac1954_1";
+ reg = <0x10>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ status = "okay";
+
+ channel@1 {
+ reg = <0x1>;
+ shunt-resistor-micro-ohms = <24900>;
+ label = "CPU";
+ microchip,vbus-mode = <0>;
+ microchip,vsense-mode = <0>;
+ microchip,accumulation-mode = <0>;
+ };
+
+ channel@3 {
+ reg = <0x3>;
+ shunt-resistor-micro-ohms = <75000>;
+ label = "MEM";
+ microchip,vbus-mode = <0>;
+ microchip,vsense-mode = <0>;
+ microchip,accumulation-mode = <0>;
+ };
+
+ channel@4 {
+ reg = <0x4>;
+ shunt-resistor-micro-ohms = <100000>;
+ label = "NET";
+ microchip,vbus-mode = <0>;
+ microchip,vsense-mode = <0>;
+ microchip,accumulation-mode = <0>;
+ };
+ };
+ };
+
+...
--
2.43.0
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