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https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
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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>
134 lines
2.6 KiB
YAML
134 lines
2.6 KiB
YAML
# 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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$id: http://devicetree.org/schemas/serial/st,stm32-uart.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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maintainers:
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- Erwan Le Ray <erwan.leray@foss.st.com>
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title: STMicroelectronics STM32 USART
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properties:
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compatible:
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enum:
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- st,stm32-uart
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- st,stm32f7-uart
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- st,stm32h7-uart
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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maxItems: 1
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resets:
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maxItems: 1
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label:
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description: label associated with this uart
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st,hw-flow-ctrl:
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description: enable hardware flow control (deprecated)
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$ref: /schemas/types.yaml#/definitions/flag
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rx-tx-swap: true
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dmas:
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minItems: 1
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maxItems: 2
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dma-names:
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items:
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enum: [ rx, tx ]
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minItems: 1
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maxItems: 2
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# cts-gpios and rts-gpios properties can be used instead of 'uart-has-rtscts'
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# or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow
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# control instead of dedicated pins.
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#
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# It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or
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# 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design.
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cts-gpios: true
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rts-gpios: true
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wakeup-source: true
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power-domains:
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maxItems: 1
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rx-threshold:
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description:
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If value is set to 1, RX FIFO threshold is disabled.
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enum: [1, 2, 4, 8, 12, 14, 16]
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default: 8
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tx-threshold:
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description:
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If value is set to 1, TX FIFO threshold is disabled.
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enum: [1, 2, 4, 8, 12, 14, 16]
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default: 8
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access-controllers:
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minItems: 1
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maxItems: 2
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allOf:
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- $ref: rs485.yaml#
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- $ref: serial.yaml#
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- if:
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required:
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- st,hw-flow-ctrl
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then:
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properties:
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cts-gpios: false
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rts-gpios: false
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- if:
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properties:
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compatible:
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const: st,stm32-uart
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then:
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properties:
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rx-tx-swap: false
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- if:
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properties:
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compatible:
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contains:
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enum:
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- st,stm32-uart
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- st,stm32f7-uart
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then:
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properties:
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rx-threshold: false
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tx-threshold: false
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/stm32mp1-clks.h>
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usart1: serial@40011000 {
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compatible = "st,stm32h7-uart";
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reg = <0x40011000 0x400>;
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interrupts = <37>;
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clocks = <&rcc 0 164>;
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dmas = <&dma2 2 4 0x414 0x0>,
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<&dma2 7 4 0x414 0x0>;
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dma-names = "rx", "tx";
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rx-threshold = <4>;
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tx-threshold = <4>;
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rs485-rts-active-low;
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};
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...
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