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dt-bindings: iio: adc: Add ltc2378
Document how to describe LTC2378-20 and similar ADCs in device tree. Reviewed-by: David Lechner <dlechner@baylibre.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
This commit is contained in:
Marcelo Schmitt
Jonathan Cameron
parent
017e71cbe0
commit
6c0e726821
170
Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml
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170
Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/adc/adi,ltc2378.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Analog Devices LTC2378 and similar Analog to Digital Converters
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maintainers:
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- Marcelo Schmitt <marcelo.schmitt@analog.com>
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description: |
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Analog Devices LTC2378 series of ADCs.
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Specifications can be found at:
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https://www.analog.com/media/en/technical-documentation/data-sheets/233818fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/236416fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/236418f.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/236716fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/236718f.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/236816f.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/236818f.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/236918fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237016fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237616fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237618fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237620fb.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237716fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237718fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237720fb.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237816fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237818fa.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237820fb.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/237918fb.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/238016fb.pdf
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$ref: /schemas/spi/spi-peripheral-props.yaml#
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properties:
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compatible:
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oneOf:
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# Single compatible string match.
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- enum:
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- adi,ltc2338-18
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- adi,ltc2364-16
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- adi,ltc2364-18
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- adi,ltc2376-16
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- adi,ltc2376-18
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- adi,ltc2376-20
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# Low sample rate fallback for 16-bit unipolar sensors.
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- items:
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- enum:
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- adi,ltc2370-16 # 2 MSPS
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- adi,ltc2368-16 # 1 MSPS
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- adi,ltc2367-16 # 500 kSPS
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- const: adi,ltc2364-16 # fallback (250 kSPS)
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# Low sample rate fallback for 18-bit unipolar sensors.
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- items:
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- enum:
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- adi,ltc2369-18 # 1.6 MSPS
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- adi,ltc2368-18 # 1 MSPS
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- adi,ltc2367-18 # 500 kSPS
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- const: adi,ltc2364-18 # fallback (250 kSPS)
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# Low sample rate fallback for 16-bit bipolar sensors.
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- items:
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- enum:
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- adi,ltc2380-16 # 2 MSPS
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- adi,ltc2378-16 # 1 MSPS
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- adi,ltc2377-16 # 500 kSPS
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- const: adi,ltc2376-16 # fallback (250 kSPS)
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# Low sample rate fallback for 18-bit bipolar sensors.
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- items:
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- enum:
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- adi,ltc2379-18 # 1.6 MSPS
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- adi,ltc2378-18 # 1 MSPS
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- adi,ltc2377-18 # 500 kSPS
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- const: adi,ltc2376-18 # fallback (250 kSPS)
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# Low sample rate fallback for 20-bit bipolar sensors.
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- items:
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- enum:
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- adi,ltc2378-20 # 1 MSPS
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- adi,ltc2377-20 # 500 kSPS
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- const: adi,ltc2376-20 # fallback (250 kSPS)
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reg:
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maxItems: 1
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spi-max-frequency:
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maximum: 100000000
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vdd-supply:
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description: A 2.5V supply that powers the chip (VDD).
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ovdd-supply:
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description:
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A 1.71V to 5.25V supply that sets the logic level for digital interface.
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ref-supply:
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description:
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Voltage reference input that determines the scale of ADC conversions.
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refin-supply:
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description:
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Alternative voltage reference input.
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cnv-gpios:
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description:
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When provided, this property indicates the GPIO that is connected to the
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CNV pin.
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maxItems: 1
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pwms:
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description: PWM signal connected to the CNV pin.
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maxItems: 1
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interrupts:
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description:
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Interrupt for signaling the completion of conversion results. The active
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low signal provided on the BUSY pin asserts when ADC conversions finish.
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maxItems: 1
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required:
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- compatible
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- reg
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- vdd-supply
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- ovdd-supply
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allOf:
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# Except for LTC2338, all designs require a voltage reference input
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- if:
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properties:
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compatible:
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not:
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contains:
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enum:
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- adi,ltc2338-18
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then:
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required:
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- ref-supply
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properties:
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refin-supply: false
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else:
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properties:
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ref-supply: false
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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adc@0 {
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compatible = "adi,ltc2378-20", "adi,ltc2376-20";
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reg = <0>;
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spi-max-frequency = <71000000>;
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vdd-supply = <&supply_2_5V>;
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ovdd-supply = <&supply_3_3V>;
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ref-supply = <&supply_5V>;
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cnv-gpios = <&gpio0 88 GPIO_ACTIVE_HIGH>;
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interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
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interrupt-parent = <&gpio>;
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};
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};
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@ -15343,6 +15343,13 @@ S: Maintained
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F: Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
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F: drivers/iio/dac/ltc1660.c
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LTC2378 IIO ADC DRIVER
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M: Marcelo Schmitt <marcelo.schmitt@analog.com>
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L: linux-iio@vger.kernel.org
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S: Supported
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W: https://ez.analog.com/linux-software-drivers
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F: Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml
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LTC2664 IIO DAC DRIVER
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M: Michael Hennerich <michael.hennerich@analog.com>
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M: Kim Seer Paller <kimseer.paller@analog.com>
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