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st,stm32-timers.yaml
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st,stm32-timers.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/st,stm32-timers.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: STMicroelectronics STM32 Timers bindings
description: |
This hardware block provides 3 types of timer along with PWM functionality:
- advanced-control timers consist of a 16-bit auto-reload counter driven
by a programmable prescaler, break input feature, PWM outputs and
complementary PWM outputs channels.
- general-purpose timers consist of a 16-bit or 32-bit auto-reload counter
driven by a programmable prescaler and PWM outputs.
- basic timers consist of a 16-bit auto-reload counter driven by a
programmable prescaler.
maintainers:
- Benjamin Gaignard <benjamin.gaignard@st.com>
- Fabrice Gasnier <fabrice.gasnier@st.com>
properties:
compatible:
const: st,stm32-timers
reg:
maxItems: 1
clocks:
maxItems: 1
clock-names:
items:
- const: int
reset:
maxItems: 1
dmas:
minItems: 1
maxItems: 7
dma-names:
items:
enum: [ ch1, ch2, ch3, ch4, up, trig, com ]
minItems: 1
maxItems: 7
"#address-cells":
const: 1
"#size-cells":
const: 0
pwm:
type: object
properties:
compatible:
const: st,stm32-pwm
"#pwm-cells":
const: 3
st,breakinput:
description:
One or two <index level filter> to describe break input
configurations.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
items:
items:
- description: |
"index" indicates on which break input (0 or 1) the
configuration should be applied.
enum: [0, 1]
- description: |
"level" gives the active level (0=low or 1=high) of the
input signal for this configuration
enum: [0, 1]
- description: |
"filter" gives the filtering value (up to 15) to be applied.
maximum: 15
minItems: 1
maxItems: 2
required:
- "#pwm-cells"
- compatible
patternProperties:
"^timer@[0-9]+$":
type: object
properties:
compatible:
enum:
- st,stm32-timer-trigger
- st,stm32h7-timer-trigger
reg:
description: Identify trigger hardware block.
items:
minimum: 0
maximum: 16
required:
- compatible
- reg
counter:
type: object
properties:
compatible:
const: st,stm32-timer-counter
required:
- compatible
required:
- compatible
- reg
- clocks
- clock-names
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/stm32mp1-clks.h>
timers2: timer@40000000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "st,stm32-timers";
reg = <0x40000000 0x400>;
clocks = <&rcc TIM2_K>;
clock-names = "int";
dmas = <&dmamux1 18 0x400 0x1>,
<&dmamux1 19 0x400 0x1>,
<&dmamux1 20 0x400 0x1>,
<&dmamux1 21 0x400 0x1>,
<&dmamux1 22 0x400 0x1>;
dma-names = "ch1", "ch2", "ch3", "ch4", "up";
pwm {
compatible = "st,stm32-pwm";
#pwm-cells = <3>;
st,breakinput = <0 1 5>;
};
timer@1 {
compatible = "st,stm32-timer-trigger";
reg = <1>;
};
counter {
compatible = "st,stm32-timer-counter";
};
};
...