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access-controllers is an optional property that allows a peripheral to refer to one or more domain access controller(s). Description of this property is added to all peripheral binding files of the peripheral under the STM32 firewall controller. It allows an accurate representation of the hardware, where various peripherals are connected to a firewall bus. The firewall can then check the peripheral accesses before allowing its device to probe. Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
115 lines
2.3 KiB
YAML
115 lines
2.3 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/dac/st,stm32-dac.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: STMicroelectronics STM32 DAC
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description: |
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The STM32 DAC is a 12-bit voltage output digital-to-analog converter. The DAC
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may be configured in 8 or 12-bit mode. It has two output channels, each with
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its own converter.
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It has built-in noise and triangle waveform generator and supports external
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triggers for conversions. The DAC's output buffer allows a high drive output
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current.
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maintainers:
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- Fabrice Gasnier <fabrice.gasnier@foss.st.com>
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properties:
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compatible:
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enum:
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- st,stm32f4-dac-core
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- st,stm32h7-dac-core
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reg:
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maxItems: 1
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resets:
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maxItems: 1
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clocks:
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maxItems: 1
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clock-names:
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items:
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- const: pclk
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vref-supply:
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description: Phandle to the vref input analog reference voltage.
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'#address-cells':
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const: 1
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'#size-cells':
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const: 0
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access-controllers:
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minItems: 1
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maxItems: 2
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additionalProperties: false
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- vref-supply
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- '#address-cells'
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- '#size-cells'
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patternProperties:
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"^dac@[1-2]+$":
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type: object
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description:
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A DAC block node should contain at least one subnode, representing an
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DAC instance/channel available on the machine.
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properties:
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compatible:
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const: st,stm32-dac
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reg:
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description: Must be either 1 or 2, to define (single) channel in use
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enum: [1, 2]
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'#io-channel-cells':
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const: 1
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additionalProperties: false
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required:
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- compatible
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- reg
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- '#io-channel-cells'
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examples:
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- |
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// Example on stm32mp157c
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#include <dt-bindings/clock/stm32mp1-clks.h>
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dac: dac@40017000 {
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compatible = "st,stm32h7-dac-core";
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reg = <0x40017000 0x400>;
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clocks = <&rcc DAC12>;
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clock-names = "pclk";
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vref-supply = <&vref>;
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#address-cells = <1>;
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#size-cells = <0>;
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dac@1 {
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compatible = "st,stm32-dac";
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#io-channel-cells = <1>;
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reg = <1>;
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};
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dac@2 {
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compatible = "st,stm32-dac";
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#io-channel-cells = <1>;
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reg = <2>;
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};
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};
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...
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