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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-lptimer.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: STMicroelectronics STM32 Low-Power Timers
description: |
The STM32 Low-Power Timer (LPTIM) is a 16-bit timer that provides several
functions
- PWM output (with programmable prescaler, configurable polarity)
- Trigger source for STM32 ADC/DAC (LPTIM_OUT)
- Several counter modes:
- quadrature encoder to detect angular position and direction of rotary
elements, from IN1 and IN2 input signals.
- simple counter from IN1 input signal.
maintainers:
- Fabrice Gasnier <fabrice.gasnier@foss.st.com>
properties:
compatible:
const: st,stm32-lptimer
reg:
maxItems: 1
clocks:
maxItems: 1
clock-names:
items:
- const: mux
interrupts:
maxItems: 1
"#address-cells":
const: 1
"#size-cells":
const: 0
wakeup-source: true
pwm:
type: object
additionalProperties: false
properties:
compatible:
const: st,stm32-pwm-lp
"#pwm-cells":
const: 3
required:
- "#pwm-cells"
- compatible
counter:
type: object
additionalProperties: false
properties:
compatible:
const: st,stm32-lptimer-counter
required:
- compatible
timer:
type: object
additionalProperties: false
properties:
compatible:
const: st,stm32-lptimer-timer
required:
- compatible
patternProperties:
"^trigger@[0-9]+$":
type: object
additionalProperties: false
properties:
compatible:
const: st,stm32-lptimer-trigger
reg:
description: Identify trigger hardware block.
items:
minimum: 0
maximum: 2
required:
- compatible
- reg
required:
- "#address-cells"
- "#size-cells"
- compatible
- reg
- clocks
- clock-names
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/stm32mp1-clks.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
timer@40002400 {
compatible = "st,stm32-lptimer";
reg = <0x40002400 0x400>;
clocks = <&timer_clk>;
clock-names = "mux";
interrupts-extended = <&exti 47 IRQ_TYPE_LEVEL_HIGH>;
#address-cells = <1>;
#size-cells = <0>;
pwm {
compatible = "st,stm32-pwm-lp";
#pwm-cells = <3>;
};
trigger@0 {
compatible = "st,stm32-lptimer-trigger";
reg = <0>;
};
counter {
compatible = "st,stm32-lptimer-counter";
};
timer {
compatible = "st,stm32-lptimer-timer";
};
};
...
|
