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Mon, 17 Dec 2018 07:27:02 -0500 From: Stefan Popa To: , , CC: Stefan Popa , , , , , , , , Subject: [PATCH v2 6/6] dt-bindings: iio: adc: Add docs for AD7606 ADC Date: Mon, 17 Dec 2018 14:23:40 +0200 Message-ID: <1545049420-16484-7-git-send-email-stefan.popa@analog.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1545049420-16484-1-git-send-email-stefan.popa@analog.com> References: <1545049420-16484-1-git-send-email-stefan.popa@analog.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.55;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(136003)(346002)(396003)(39860400002)(376002)(2980300002)(3190300001)(199004)(189003)(44832011)(76176011)(8936002)(8676002)(336012)(23676004)(186003)(11346002)(106002)(7696005)(426003)(36756003)(53416004)(26005)(2906002)(7636002)(7416002)(126002)(486006)(478600001)(966005)(316002)(305945005)(4326008)(2870700001)(116002)(6306002)(50466002)(446003)(110136005)(54906003)(77096007)(5820100001)(72206003)(50226002)(47776003)(106466001)(2616005)(476003)(246002)(5660300001)(6666004)(356004);DIR:OUT;SFP:1101;SCL:1;SRVR:SN6PR03MB3728;H:nwd2mta1.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail10.analog.com;A:1;MX:1; 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Signed-off-by: Stefan Popa Reviewed-by: Rob Herring --- .../devicetree/bindings/iio/adc/adi,ad7606.txt | 65 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 66 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..d7b6241 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt @@ -0,0 +1,65 @@ +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" + * "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 +- adi,conversion-start-gpios: must be the device tree identifier of the CONVST pin. + This logic input is used to initiate conversions on the analog + input channels. As the line is active high, it should be marked + GPIO_ACTIVE_HIGH. + +Optional properties: + +- reset-gpios: must be the device tree identifier of the RESET pin. If specified, + it will be asserted during driver probe. As the line is active high, + it should be marked GPIO_ACTIVE_HIGH. +- standby-gpios: 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. As the line is active low, it should be marked + GPIO_ACTIVE_LOW. +- adi,first-data-gpios: 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. + As the line is active high, it should be marked GPIO_ACTIVE_HIGH. +- adi,range-gpios: 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 + all channels. If this pin is tied to a logic low, the analog input range + is ±5V for all channels. As the line is active high, it should be marked + GPIO_ACTIVE_HIGH. +- adi,oversampling-ratio-gpios: must be the device tree identifier of the over-sampling + mode pins. As the line is active high, it should be marked + GPIO_ACTIVE_HIGH. + +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>; + + adi,conversion-start-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>; + reset-gpios = <&gpio 27 GPIO_ACTIVE_HIGH>; + adi,first-data-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>; + adi,oversampling-ratio-gpios = <&gpio 18 GPIO_ACTIVE_HIGH + &gpio 23 GPIO_ACTIVE_HIGH + &gpio 26 GPIO_ACTIVE_HIGH>; + standby-gpios = <&gpio 24 GPIO_ACTIVE_LOW>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index bc9f816..d039f66 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -860,6 +860,7 @@ L: linux-iio@vger.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 -- 2.7.4