linux-kernel - [PATCH 2/2] dt-bindings: iio: adc: Add docs for AD7606 ADC

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Message-ID: <1539853956-26644-1-git-send-email-stefan.popa@analog.com>
Date:   Thu, 18 Oct 2018 12:12:36 +0300
From:   Stefan Popa <stefan.popa@...log.com>
To:     <jic23@...nel.org>, <robh+dt@...nel.org>, <mark.rutland@....com>
CC:     <knaack.h@....de>, <lars@...afoo.de>, <pmeerw@...erw.net>,
        <Michael.Hennerich@...log.com>, <gregkh@...uxfoundation.org>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <stefan.popa@...log.com>
Subject: [PATCH 2/2] dt-bindings: iio: adc: Add docs for AD7606 ADC

Document support for AD7606 Analog to Digital Converter.

Signed-off-by: Stefan Popa <stefan.popa@...log.com>
---
 .../devicetree/bindings/iio/adc/adi,ad7606.txt     | 51 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt
new file mode 100644
index 0000000..dede581
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt
@@ -0,0 +1,51 @@
+Analog Devices AD7606 Simultaneous Sampling ADC
+
+Required properties for the AD7606:
+
+ - compatible: Must be one of "adi,ad7605-4", "adi,ad7606-8", "adi,ad7606-6" or
+ 	       "adi,ad7606-4".
+ - reg: SPI chip select number for the device
+ - spi-max-frequency: Max SPI frequency to use
+ 	see: Documentation/devicetree/bindings/spi/spi-bus.txt
+ - spi-cpha: See Documentation/devicetree/bindings/spi/spi-bus.txt
+ - avcc-supply: phandle to the Avcc power supply
+ - interrupts: IRQ line for the ADC
+ 	see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+ - conversion-start-gpio: must be the device tree identifier of the CONVST pin.
+			  This logic input is used to initiate conversions on
+			  the analog input channels.
+
+Optional properties:
+
+ - reset-gpio: must be the device tree identifier of the RESET pin. If specified,
+ 	       it will be asserted during driver probe.
+ - first-data-gpio: must be the device tree identifier of the FRSTDATA pin.
+ 		    The FRSTDATA output indicates when the first channel, V1, is
+		    being read back on either the parallel, byte or serial interface.
+- standby-gpio: must be the device tree identifier of the STBY pin. This pin is used
+		to place the AD7606 into one of two power-down modes, Standby mode or
+		Shutdown mode.
+- range-gpio: must be the device tree identifier of the RANGE pin. The polarity on
+	      this pin determines the input range of the analog input channels. If
+	      this pin is tied to a logic high, the analog input range is ±10V for
+	      allchannels. If this pin is tied to a logic low, the analog input range
+	      is ±5V for all channels.
+
+Example:
+
+	adc@0 {
+		compatible = "adi,ad7606-8";
+		reg = <0>;
+		spi-max-frequency = <1000000>;
+		spi-cpol;
+
+		avcc-supply = <&adc_vref>;
+
+		interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+		interrupt-parent = <&gpio>;
+
+		conversion-start-gpio = <&gpio 17 0>;
+		reset-gpio = <&gpio 27 0>;
+		first-data-gpio = <&gpio 22 0>;
+		standby-gpio = <&gpio 24 0>;
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 843545d..6d63db4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -845,6 +845,7 @@ L:	linux-iio@...r.kernel.org
 W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/iio/adc/ad7606.c
+F:	Documentation/devicetree/bindings/iio/adc/ad7606.txt
 
 ANALOG DEVICES INC AD9389B DRIVER
 M:	Hans Verkuil <hans.verkuil@...co.com>
-- 
2.7.4