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