| Benjamin Gaignard | b88091f | 2019-11-18 10:48:42 +0100 | [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 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: STMicroelectronics STM32 Low-Power Timers bindings |
| 8 | |
| 9 | description: | |
| 10 | The STM32 Low-Power Timer (LPTIM) is a 16-bit timer that provides several |
| 11 | functions |
| 12 | - PWM output (with programmable prescaler, configurable polarity) |
| 13 | - Trigger source for STM32 ADC/DAC (LPTIM_OUT) |
| 14 | - Several counter modes: |
| 15 | - quadrature encoder to detect angular position and direction of rotary |
| 16 | elements, from IN1 and IN2 input signals. |
| 17 | - simple counter from IN1 input signal. |
| 18 | |
| 19 | maintainers: |
| 20 | - Fabrice Gasnier <fabrice.gasnier@st.com> |
| 21 | |
| 22 | properties: |
| 23 | compatible: |
| 24 | const: st,stm32-lptimer |
| 25 | |
| 26 | reg: |
| 27 | maxItems: 1 |
| 28 | |
| 29 | clocks: |
| 30 | maxItems: 1 |
| 31 | |
| 32 | clock-names: |
| 33 | items: |
| 34 | - const: mux |
| 35 | |
| 36 | "#address-cells": |
| 37 | const: 1 |
| 38 | |
| 39 | "#size-cells": |
| 40 | const: 0 |
| 41 | |
| Benjamin Gaignard | ba58369 | 2020-02-17 14:45:44 +0100 | [diff] [blame^] | 42 | wakeup-source: true |
| 43 | |
| Benjamin Gaignard | b88091f | 2019-11-18 10:48:42 +0100 | [diff] [blame] | 44 | pwm: |
| 45 | type: object |
| 46 | |
| 47 | properties: |
| 48 | compatible: |
| 49 | const: st,stm32-pwm-lp |
| 50 | |
| 51 | "#pwm-cells": |
| 52 | const: 3 |
| 53 | |
| 54 | required: |
| 55 | - "#pwm-cells" |
| 56 | - compatible |
| 57 | |
| 58 | patternProperties: |
| 59 | "^trigger@[0-9]+$": |
| 60 | type: object |
| 61 | |
| 62 | properties: |
| 63 | compatible: |
| 64 | const: st,stm32-lptimer-trigger |
| 65 | |
| 66 | reg: |
| 67 | description: Identify trigger hardware block. |
| 68 | items: |
| 69 | minimum: 0 |
| 70 | maximum: 2 |
| 71 | |
| 72 | required: |
| 73 | - compatible |
| 74 | - reg |
| 75 | |
| 76 | counter: |
| 77 | type: object |
| 78 | |
| 79 | properties: |
| 80 | compatible: |
| 81 | const: st,stm32-lptimer-counter |
| 82 | |
| 83 | required: |
| 84 | - compatible |
| 85 | |
| Benjamin Gaignard | ba58369 | 2020-02-17 14:45:44 +0100 | [diff] [blame^] | 86 | timer: |
| 87 | type: object |
| 88 | |
| 89 | properties: |
| 90 | compatible: |
| 91 | const: st,stm32-lptimer-timer |
| 92 | |
| 93 | required: |
| 94 | - compatible |
| 95 | |
| Benjamin Gaignard | b88091f | 2019-11-18 10:48:42 +0100 | [diff] [blame] | 96 | required: |
| 97 | - "#address-cells" |
| 98 | - "#size-cells" |
| 99 | - compatible |
| 100 | - reg |
| 101 | - clocks |
| 102 | - clock-names |
| 103 | |
| 104 | additionalProperties: false |
| 105 | |
| 106 | examples: |
| 107 | - | |
| 108 | #include <dt-bindings/clock/stm32mp1-clks.h> |
| 109 | timer@40002400 { |
| 110 | compatible = "st,stm32-lptimer"; |
| 111 | reg = <0x40002400 0x400>; |
| 112 | clocks = <&timer_clk>; |
| 113 | clock-names = "mux"; |
| 114 | #address-cells = <1>; |
| 115 | #size-cells = <0>; |
| 116 | |
| 117 | pwm { |
| 118 | compatible = "st,stm32-pwm-lp"; |
| 119 | #pwm-cells = <3>; |
| 120 | }; |
| 121 | |
| 122 | trigger@0 { |
| 123 | compatible = "st,stm32-lptimer-trigger"; |
| 124 | reg = <0>; |
| 125 | }; |
| 126 | |
| 127 | counter { |
| 128 | compatible = "st,stm32-lptimer-counter"; |
| 129 | }; |
| Benjamin Gaignard | ba58369 | 2020-02-17 14:45:44 +0100 | [diff] [blame^] | 130 | |
| 131 | timer { |
| 132 | compatible = "st,stm32-lptimer-timer"; |
| 133 | }; |
| Benjamin Gaignard | b88091f | 2019-11-18 10:48:42 +0100 | [diff] [blame] | 134 | }; |
| 135 | |
| 136 | ... |