0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/mfd/st,stm32-lptimer.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: STMicroelectronics STM32 Low-Power Timers bindings
0008
0009 description: |
0010 The STM32 Low-Power Timer (LPTIM) is a 16-bit timer that provides several
0011 functions
0012 - PWM output (with programmable prescaler, configurable polarity)
0013 - Trigger source for STM32 ADC/DAC (LPTIM_OUT)
0014 - Several counter modes:
0015 - quadrature encoder to detect angular position and direction of rotary
0016 elements, from IN1 and IN2 input signals.
0017 - simple counter from IN1 input signal.
0018
0019 maintainers:
0020 - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
0021
0022 properties:
0023 compatible:
0024 const: st,stm32-lptimer
0025
0026 reg:
0027 maxItems: 1
0028
0029 clocks:
0030 maxItems: 1
0031
0032 clock-names:
0033 items:
0034 - const: mux
0035
0036 interrupts:
0037 maxItems: 1
0038
0039 "#address-cells":
0040 const: 1
0041
0042 "#size-cells":
0043 const: 0
0044
0045 wakeup-source: true
0046
0047 pwm:
0048 type: object
0049
0050 properties:
0051 compatible:
0052 const: st,stm32-pwm-lp
0053
0054 "#pwm-cells":
0055 const: 3
0056
0057 required:
0058 - "#pwm-cells"
0059 - compatible
0060
0061 counter:
0062 type: object
0063
0064 properties:
0065 compatible:
0066 const: st,stm32-lptimer-counter
0067
0068 required:
0069 - compatible
0070
0071 timer:
0072 type: object
0073
0074 properties:
0075 compatible:
0076 const: st,stm32-lptimer-timer
0077
0078 required:
0079 - compatible
0080
0081 patternProperties:
0082 "^trigger@[0-9]+$":
0083 type: object
0084
0085 properties:
0086 compatible:
0087 const: st,stm32-lptimer-trigger
0088
0089 reg:
0090 description: Identify trigger hardware block.
0091 items:
0092 minimum: 0
0093 maximum: 2
0094
0095 required:
0096 - compatible
0097 - reg
0098
0099 required:
0100 - "#address-cells"
0101 - "#size-cells"
0102 - compatible
0103 - reg
0104 - clocks
0105 - clock-names
0106
0107 additionalProperties: false
0108
0109 examples:
0110 - |
0111 #include <dt-bindings/clock/stm32mp1-clks.h>
0112 #include <dt-bindings/interrupt-controller/arm-gic.h>
0113 timer@40002400 {
0114 compatible = "st,stm32-lptimer";
0115 reg = <0x40002400 0x400>;
0116 clocks = <&timer_clk>;
0117 clock-names = "mux";
0118 interrupts-extended = <&exti 47 IRQ_TYPE_LEVEL_HIGH>;
0119 #address-cells = <1>;
0120 #size-cells = <0>;
0121
0122 pwm {
0123 compatible = "st,stm32-pwm-lp";
0124 #pwm-cells = <3>;
0125 };
0126
0127 trigger@0 {
0128 compatible = "st,stm32-lptimer-trigger";
0129 reg = <0>;
0130 };
0131
0132 counter {
0133 compatible = "st,stm32-lptimer-counter";
0134 };
0135
0136 timer {
0137 compatible = "st,stm32-lptimer-timer";
0138 };
0139 };
0140
0141 ...
