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Mon, 29 Oct 2018 09:40:07 -0700 Received: from linux.analog.com (10.50.1.118) by NWD2HUBCAS7.ad.analog.com (10.64.69.107) with Microsoft SMTP Server id 14.3.301.0; Mon, 29 Oct 2018 12:40:06 -0400 From: Stefan Popa To: , , CC: , , , , , , , , Subject: [PATCH v3 3/3] dt-bindings: iio: adc: Add docs for ad7124 Date: Mon, 29 Oct 2018 18:39:30 +0200 Message-ID: <1540831170-3150-1-git-send-email-stefan.popa@analog.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.57;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(39860400002)(346002)(376002)(396003)(136003)(2980300002)(438002)(189003)(199004)(50226002)(186003)(7636002)(44832011)(305945005)(246002)(106002)(53416004)(26005)(8676002)(4326008)(77096007)(316002)(8936002)(106466001)(110136005)(126002)(476003)(486006)(426003)(2616005)(54906003)(336012)(36756003)(478600001)(1720100001)(72206003)(6306002)(47776003)(2870700001)(7696005)(50466002)(5820100001)(23676004)(7416002)(356004)(6666004)(5660300001)(107886003)(2906002)(966005);DIR:OUT;SFP:1101;SCL:1;SRVR:BL2PR03MB547;H:nwd2mta4.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail11.analog.com;MX:1;A:1; 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Signed-off-by: Stefan Popa --- Changes in v2: - Nothing changed. Changes in v3: - Removed the "adi,channels" property. - Used the "reg" property to get the channel number and "adi,diff-channels" for the differential pins. The "adi,channel-number" property was removed. - adi,bipolar is of boolean type. .../devicetree/bindings/iio/adc/adi,ad7124.txt | 90 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 91 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt new file mode 100644 index 0000000..46a9b71 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt @@ -0,0 +1,90 @@ +Analog Devices AD7124 ADC device driver + +Required properties for the AD7124: + - compatible: Must be one of "adi,ad7124-4" or "adi,ad7124-8" + - reg: SPI chip select number for the device + - spi-max-frequency: Max SPI frequency to use + see: Documentation/devicetree/bindings/spi/spi-bus.txt + - clocks: phandle to the master clock (mclk) + see: Documentation/devicetree/bindings/clock/clock-bindings.txt + - clock-names: Must be "mclk". + - interrupts: IRQ line for the ADC + see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt + + Required properties: + * #address-cells: Must be 1. + * #size-cells: Must be 0. + + Subnode(s) represent the external channels which are connected to the ADC. + Each subnode represents one channel and has the following properties: + Required properties: + * reg: The channel number. It can have up to 4 channels on ad7124-4 + and 8 channels on ad7124-8, numbered from 0 to 15. + * adi,diff-channels: Pins the channel is connected to. The first value + specifies the positive input pin, the second value the negative input pin. + + Optional properties: + * adi,bipolar: Boolean, if set the channel is used in bipolar mode. + * adi,reference-select: Select the reference source to use when + converting on the the specific channel. Valid values are: + 0: REFIN1(+)/REFIN1(−). + 1: REFIN2(+)/REFIN2(−). + 3: AVDD + If this field is left empty, internal reference is selected. + * adi,gain: Select the gain when converting on the specific channel. + Valid values are: 1, 2, 4, 8, 16, 32, 64, 128. + If this field is left empty, gain of 1 is selected. + * adi,odr-hz: The output data rate can be programmed from: + 9 to 19200 for full power mode (when the master clock is 614.4 kHz) + 2 to 4800 for mid power mode (when the master clock is 153.6 kHz) + 1 to 2400 for low power mode (when the master clock is 76.8 kHz) + If this field is left empty, odr of 9 is selected. + +Optional properties: + - refin1-supply: refin1 supply can be used as reference for conversion. + - refin2-supply: refin2 supply can be used as reference for conversion. + - avdd-supply: avdd supply can be used as reference for conversion. + +Example: + adc@0 { + compatible = "adi,ad7124-4"; + reg = <0>; + spi-max-frequency = <5000000>; + interrupts = <25 2>; + interrupt-parent = <&gpio>; + refin1-supply = <&adc_vref>; + clocks = <&ad7124_mclk>; + clock-names = "mclk"; + + #address-cells = <1>; + #size-cells = <0>; + + channel@0 { + reg = <0>; + adi,diff-channels = <0 1>; + adi,reference-select = <0>; + adi,gain = <2>; + adi,odr-hz = <10>; + }; + + channel@1 { + reg = <1>; + adi,bipolar; + adi,diff-channels = <2 3>; + adi,reference-select = <0>; + adi,gain = <4>; + adi,odr-hz = <50>; + }; + + channel@2 { + reg = <2>; + adi,diff-channels = <4 5>; + adi,gain = <128>; + adi,odr-hz = <19200>; + }; + + channel@3 { + reg = <3>; + adi,diff-channels = <6 7>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 3a1bfcb..f2fa508 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -845,6 +845,7 @@ L: linux-iio@vger.kernel.org W: http://ez.analog.com/community/linux-device-drivers S: Supported F: drivers/iio/adc/ad7124.c +F: Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt ANALOG DEVICES INC AD9389B DRIVER M: Hans Verkuil