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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/iio/dac/st,stm32-dac.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: STMicroelectronics STM32 DAC bindings
description: |
The STM32 DAC is a 12-bit voltage output digital-to-analog converter. The DAC
may be configured in 8 or 12-bit mode. It has two output channels, each with
its own converter.
It has built-in noise and triangle waveform generator and supports external
triggers for conversions. The DAC's output buffer allows a high drive output
current.
maintainers:
- Fabrice Gasnier <fabrice.gasnier@foss.st.com>
properties:
compatible:
enum:
- st,stm32f4-dac-core
- st,stm32h7-dac-core
reg:
maxItems: 1
resets:
maxItems: 1
clocks:
maxItems: 1
clock-names:
items:
- const: pclk
vref-supply:
description: Phandle to the vref input analog reference voltage.
'#address-cells':
const: 1
'#size-cells':
const: 0
additionalProperties: false
required:
- compatible
- reg
- clocks
- clock-names
- vref-supply
- '#address-cells'
- '#size-cells'
patternProperties:
"^dac@[1-2]+$":
type: object
description:
A DAC block node should contain at least one subnode, representing an
DAC instance/channel available on the machine.
properties:
compatible:
const: st,stm32-dac
reg:
description: Must be either 1 or 2, to define (single) channel in use
enum: [1, 2]
'#io-channel-cells':
const: 1
additionalProperties: false
required:
- compatible
- reg
- '#io-channel-cells'
examples:
- |
// Example on stm32mp157c
#include <dt-bindings/clock/stm32mp1-clks.h>
dac: dac@40017000 {
compatible = "st,stm32h7-dac-core";
reg = <0x40017000 0x400>;
clocks = <&rcc DAC12>;
clock-names = "pclk";
vref-supply = <&vref>;
#address-cells = <1>;
#size-cells = <0>;
dac@1 {
compatible = "st,stm32-dac";
#io-channel-cells = <1>;
reg = <1>;
};
dac@2 {
compatible = "st,stm32-dac";
#io-channel-cells = <1>;
reg = <2>;
};
};
...
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