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Message-ID: <9992a318aec777b9b7788bb40d976aa89e5963fe.1558219042.git.renatogeh@gmail.com>
Date: Sat, 18 May 2019 19:41:12 -0300
From: Renato Lui Geh <renatogeh@...il.com>
To: lars@...afoo.de, Michael.Hennerich@...log.com, jic23@...nel.org,
knaack.h@....de, pmeerw@...erw.net, gregkh@...uxfoundation.org,
stefan.popa@...log.com, alexandru.Ardelean@...log.com,
robh+dt@...nel.org, mark.rutland@....com
Cc: linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org, kernel-usp@...glegroups.com,
devicetree@...r.kernel.org
Subject: [PATCH] dt-bindings: iio: adc: add adi,ad7780.yaml binding
This patch adds a YAML binding for the Analog Devices AD7780/1 and
AD7170/1 analog-to-digital converters.
Signed-off-by: Renato Lui Geh <renatogeh@...il.com>
---
.../bindings/iio/adc/adi,ad7780.txt | 48 -----------
.../bindings/iio/adc/adi,ad7780.yaml | 85 +++++++++++++++++++
2 files changed, 85 insertions(+), 48 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt
create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt
deleted file mode 100644
index 440e52555349..000000000000
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt
+++ /dev/null
@@ -1,48 +0,0 @@
-* Analog Devices AD7170/AD7171/AD7780/AD7781
-
-Data sheets:
-
-- AD7170:
- * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf
-- AD7171:
- * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
-- AD7780:
- * https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
-- AD7781:
- * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
-
-Required properties:
-
-- compatible: should be one of
- * "adi,ad7170"
- * "adi,ad7171"
- * "adi,ad7780"
- * "adi,ad7781"
-- reg: spi chip select number for the device
-- vref-supply: the regulator supply for the ADC reference voltage
-
-Optional properties:
-
-- powerdown-gpios: must be the device tree identifier of the PDRST pin. If
- specified, it will be asserted during driver probe. As the
- line is active high, it should be marked GPIO_ACTIVE_HIGH.
-- adi,gain-gpios: must be the device tree identifier of the GAIN pin. Only for
- the ad778x chips. If specified, it will be asserted during
- driver probe. As the line is active low, it should be marked
- GPIO_ACTIVE_LOW.
-- adi,filter-gpios: must be the device tree identifier of the FILTER pin. Only
- for the ad778x chips. If specified, it will be asserted
- during driver probe. As the line is active low, it should be
- marked GPIO_ACTIVE_LOW.
-
-Example:
-
-adc@0 {
- compatible = "adi,ad7780";
- reg = <0>;
- vref-supply = <&vdd_supply>
-
- powerdown-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
- adi,gain-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
- adi,filter-gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
-};
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml
new file mode 100644
index 000000000000..931bc4f8ec04
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml
@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7780.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD7170/AD7171/AD7780/AD7781 analog to digital converters
+
+maintainers:
+ - Michael Hennerich <michael.hennerich@...log.com>
+
+description: |
+ The ad7780 is a sigma-delta analog to digital converter. This driver provides
+ reading voltage values and status bits from both the ad778x and ad717x series.
+ Its interface also allows writing on the FILTER and GAIN GPIO pins on the
+ ad778x.
+
+ Specifications on the converters can be found at:
+ AD7170:
+ https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf
+ AD7171:
+ https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
+ AD7780:
+ https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
+ AD7781:
+ https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
+
+properties:
+ compatible:
+ enum:
+ - adi,ad7170
+ - adi,ad7171
+ - adi,ad7780
+ - adi,ad7781
+
+ reg:
+ description:
+ Chip select number for the device
+ maxItems: 1
+
+ vref-supply:
+ description:
+ The regulator supply for the ADC reference voltage
+ maxItems: 1
+
+ powerdown-gpios:
+ description:
+ Must be the device tree identifier of the PDRST pin. If
+ specified, it will be asserted during driver probe. As the
+ line is active high, it should be marked GPIO_ACTIVE_HIGH.
+ maxItems: 1
+
+ adi,gain-gpios:
+ description:
+ Must be the device tree identifier of the GAIN pin. Only for
+ the ad778x chips. If specified, it will be asserted during
+ driver probe. As the line is active low, it should be marked
+ GPIO_ACTIVE_LOW.
+ maxItems: 1
+
+ adi,filter-gpios:
+ description:
+ Must be the device tree identifier of the FILTER pin. Only
+ for the ad778x chips. If specified, it will be asserted
+ during driver probe. As the line is active low, it should be
+ marked GPIO_ACTIVE_LOW.
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - vref-supply
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ adc@0 {
+ compatible = "adi,ad7780";
+ reg = <0>;
+ vref-supply = <&vdd_supply>;
+
+ powerdown-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
+ adi,gain-gpios = <&gpio1 5 GPIO_ACTIVE_LOW>;
+ adi,filter-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>;
+ };
--
2.21.0
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