| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/mfd/st,stm32-lptimer.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: STMicroelectronics STM32 Low-Power Timers |
| 8 | |
| 9 | description: | |
| 10 | The STM32 Low-Power Timer (LPTIM) is a 16-bit timer that provides several |
| 11 | functions |
| 12 | - PWM output (with programmable prescaler, configurable polarity) |
| 13 | - Trigger source for STM32 ADC/DAC (LPTIM_OUT) |
| 14 | - Several counter modes: |
| 15 | - quadrature encoder to detect angular position and direction of rotary |
| 16 | elements, from IN1 and IN2 input signals. |
| 17 | - simple counter from IN1 input signal. |
| 18 | |
| 19 | maintainers: |
| 20 | - Fabrice Gasnier <fabrice.gasnier@foss.st.com> |
| 21 | |
| 22 | properties: |
| 23 | compatible: |
| 24 | const: st,stm32-lptimer |
| 25 | |
| 26 | reg: |
| 27 | maxItems: 1 |
| 28 | |
| 29 | clocks: |
| 30 | maxItems: 1 |
| 31 | |
| 32 | clock-names: |
| 33 | items: |
| 34 | - const: mux |
| 35 | |
| 36 | interrupts: |
| 37 | maxItems: 1 |
| 38 | |
| 39 | "#address-cells": |
| 40 | const: 1 |
| 41 | |
| 42 | "#size-cells": |
| 43 | const: 0 |
| 44 | |
| 45 | wakeup-source: true |
| 46 | |
| Tom Rini | 762f85b | 2024-07-20 11:15:10 -0600 | [diff] [blame] | 47 | access-controllers: |
| 48 | minItems: 1 |
| 49 | maxItems: 2 |
| 50 | |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 51 | pwm: |
| 52 | type: object |
| 53 | additionalProperties: false |
| 54 | |
| 55 | properties: |
| 56 | compatible: |
| 57 | const: st,stm32-pwm-lp |
| 58 | |
| 59 | "#pwm-cells": |
| 60 | const: 3 |
| 61 | |
| 62 | required: |
| 63 | - "#pwm-cells" |
| 64 | - compatible |
| 65 | |
| 66 | counter: |
| 67 | type: object |
| 68 | additionalProperties: false |
| 69 | |
| 70 | properties: |
| 71 | compatible: |
| 72 | const: st,stm32-lptimer-counter |
| 73 | |
| 74 | required: |
| 75 | - compatible |
| 76 | |
| 77 | timer: |
| 78 | type: object |
| 79 | additionalProperties: false |
| 80 | |
| 81 | properties: |
| 82 | compatible: |
| 83 | const: st,stm32-lptimer-timer |
| 84 | |
| 85 | required: |
| 86 | - compatible |
| 87 | |
| 88 | patternProperties: |
| 89 | "^trigger@[0-9]+$": |
| 90 | type: object |
| 91 | additionalProperties: false |
| 92 | |
| 93 | properties: |
| 94 | compatible: |
| 95 | const: st,stm32-lptimer-trigger |
| 96 | |
| 97 | reg: |
| 98 | description: Identify trigger hardware block. |
| 99 | items: |
| 100 | minimum: 0 |
| 101 | maximum: 2 |
| 102 | |
| 103 | required: |
| 104 | - compatible |
| 105 | - reg |
| 106 | |
| 107 | required: |
| 108 | - "#address-cells" |
| 109 | - "#size-cells" |
| 110 | - compatible |
| 111 | - reg |
| 112 | - clocks |
| 113 | - clock-names |
| 114 | |
| 115 | additionalProperties: false |
| 116 | |
| 117 | examples: |
| 118 | - | |
| 119 | #include <dt-bindings/clock/stm32mp1-clks.h> |
| 120 | #include <dt-bindings/interrupt-controller/arm-gic.h> |
| 121 | timer@40002400 { |
| 122 | compatible = "st,stm32-lptimer"; |
| 123 | reg = <0x40002400 0x400>; |
| 124 | clocks = <&timer_clk>; |
| 125 | clock-names = "mux"; |
| 126 | interrupts-extended = <&exti 47 IRQ_TYPE_LEVEL_HIGH>; |
| 127 | #address-cells = <1>; |
| 128 | #size-cells = <0>; |
| 129 | |
| 130 | pwm { |
| 131 | compatible = "st,stm32-pwm-lp"; |
| 132 | #pwm-cells = <3>; |
| 133 | }; |
| 134 | |
| 135 | trigger@0 { |
| 136 | compatible = "st,stm32-lptimer-trigger"; |
| 137 | reg = <0>; |
| 138 | }; |
| 139 | |
| 140 | counter { |
| 141 | compatible = "st,stm32-lptimer-counter"; |
| 142 | }; |
| 143 | |
| 144 | timer { |
| 145 | compatible = "st,stm32-lptimer-timer"; |
| 146 | }; |
| 147 | }; |
| 148 | |
| 149 | ... |