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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/atmel,sama9260-adc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: AT91 sama9260 and similar Analog to Digital Converter (ADC)
maintainers:
- Alexandre Belloni <alexandre.belloni@bootlin.com>
properties:
compatible:
enum:
- atmel,at91sam9260-adc
- atmel,at91sam9rl-adc
- atmel,at91sam9g45-adc
- atmel,at91sam9x5-adc
- atmel,at91sama5d3-adc
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
minItems: 2
maxItems: 2
clock-names:
items:
- const: adc_clk
- const: adc_op_clk
atmel,adc-channels-used:
$ref: /schemas/types.yaml#/definitions/uint32
description: Bitmask of the channels muxed and enabled for this device
atmel,adc-startup-time:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Startup Time of the ADC in microseconds as defined in the datasheet
atmel,adc-vref:
$ref: /schemas/types.yaml#/definitions/uint32
description: Reference voltage in millivolts for the conversions
atmel,adc-use-external-triggers:
$ref: /schemas/types.yaml#/definitions/flag
description: Enable the external triggers
atmel,adc-use-res:
$ref: /schemas/types.yaml#/definitions/string
description:
String corresponding to an identifier from atmel,adc-res-names property.
If not specified, the highest resolution will be used.
enum:
- "lowres"
- "highres"
atmel,adc-sleep-mode:
$ref: /schemas/types.yaml#/definitions/flag
description: Enable sleep mode when no conversion
atmel,adc-sample-hold-time:
$ref: /schemas/types.yaml#/definitions/uint32
description: Sample and Hold Time in microseconds
atmel,adc-ts-wires:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Number of touchscreen wires. Must be set to enable touchscreen.
NOTE: when adc touchscreen is enabled, the adc hardware trigger will be
disabled. Since touchscreen will occupy the trigger register.
enum:
- 4
- 5
atmel,adc-ts-pressure-threshold:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Pressure threshold for touchscreen.
"#io-channel-cells":
const: 1
additionalProperties: false
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
- atmel,adc-channels-used
- atmel,adc-startup-time
- atmel,adc-vref
patternProperties:
"^(trigger)[0-9]$":
type: object
description: Child node to describe a trigger exposed to the user.
properties:
trigger-name:
$ref: /schemas/types.yaml#/definitions/string
description: Identifying name.
trigger-value:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Value to put in the Trigger register to activate this trigger
trigger-external:
$ref: /schemas/types.yaml#/definitions/flag
description: This trigger is provided from an external pin.
additionalProperties: false
required:
- trigger-name
- trigger-value
examples:
- |
#include <dt-bindings/dma/at91.h>
#include <dt-bindings/interrupt-controller/irq.h>
soc {
#address-cells = <1>;
#size-cells = <1>;
adc@fffb0000 {
compatible = "atmel,at91sam9260-adc";
reg = <0xfffb0000 0x100>;
interrupts = <20 IRQ_TYPE_LEVEL_HIGH 0>;
clocks = <&adc_clk>, <&adc_op_clk>;
clock-names = "adc_clk", "adc_op_clk";
atmel,adc-channels-used = <0xff>;
atmel,adc-startup-time = <40>;
atmel,adc-use-external-triggers;
atmel,adc-vref = <3300>;
atmel,adc-use-res = "lowres";
trigger0 {
trigger-name = "external-rising";
trigger-value = <0x1>;
trigger-external;
};
trigger1 {
trigger-name = "external-falling";
trigger-value = <0x2>;
trigger-external;
};
trigger2 {
trigger-name = "external-any";
trigger-value = <0x3>;
trigger-external;
};
trigger3 {
trigger-name = "continuous";
trigger-value = <0x6>;
};
};
};
...
|
