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159 lines
3.4 KiB
YAML
159 lines
3.4 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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$id: http://devicetree.org/schemas/mfd/st,stm32-timers.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: STMicroelectronics STM32 Timers bindings
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description: |
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This hardware block provides 3 types of timer along with PWM functionality:
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- advanced-control timers consist of a 16-bit auto-reload counter driven
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by a programmable prescaler, break input feature, PWM outputs and
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complementary PWM outputs channels.
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- general-purpose timers consist of a 16-bit or 32-bit auto-reload counter
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driven by a programmable prescaler and PWM outputs.
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- basic timers consist of a 16-bit auto-reload counter driven by a
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programmable prescaler.
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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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const: st,stm32-timers
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reg:
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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: int
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reset:
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maxItems: 1
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dmas:
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minItems: 1
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maxItems: 7
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dma-names:
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items:
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enum: [ ch1, ch2, ch3, ch4, up, trig, com ]
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minItems: 1
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maxItems: 7
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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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pwm:
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type: object
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properties:
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compatible:
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const: st,stm32-pwm
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"#pwm-cells":
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const: 3
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st,breakinput:
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description:
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One or two <index level filter> to describe break input
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configurations.
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$ref: /schemas/types.yaml#/definitions/uint32-matrix
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items:
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items:
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- description: |
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"index" indicates on which break input (0 or 1) the
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configuration should be applied.
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enum: [0, 1]
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- description: |
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"level" gives the active level (0=low or 1=high) of the
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input signal for this configuration
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enum: [0, 1]
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- description: |
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"filter" gives the filtering value (up to 15) to be applied.
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maximum: 15
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minItems: 1
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maxItems: 2
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required:
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- "#pwm-cells"
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- compatible
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patternProperties:
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"^timer@[0-9]+$":
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type: object
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properties:
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compatible:
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enum:
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- st,stm32-timer-trigger
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- st,stm32h7-timer-trigger
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reg:
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description: Identify trigger hardware block.
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items:
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minimum: 0
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maximum: 16
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required:
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- compatible
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- reg
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counter:
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type: object
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properties:
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compatible:
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const: st,stm32-timer-counter
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required:
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- compatible
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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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additionalProperties: 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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timers2: timer@40000000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "st,stm32-timers";
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reg = <0x40000000 0x400>;
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clocks = <&rcc TIM2_K>;
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clock-names = "int";
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dmas = <&dmamux1 18 0x400 0x1>,
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<&dmamux1 19 0x400 0x1>,
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<&dmamux1 20 0x400 0x1>,
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<&dmamux1 21 0x400 0x1>,
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<&dmamux1 22 0x400 0x1>;
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dma-names = "ch1", "ch2", "ch3", "ch4", "up";
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pwm {
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compatible = "st,stm32-pwm";
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#pwm-cells = <3>;
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st,breakinput = <0 1 5>;
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};
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timer@1 {
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compatible = "st,stm32-timer-trigger";
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reg = <1>;
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};
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counter {
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compatible = "st,stm32-timer-counter";
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};
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};
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...
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