Documentation/devicetree/bindings/mfd/st,stm32-timers.yaml

   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-timers.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: STMicroelectronics STM32 Timers bindings
   8
   9 description: |
  10   This hardware block provides 3 types of timer along with PWM functionality:
  11     - advanced-control timers consist of a 16-bit auto-reload counter driven
  12       by a programmable prescaler, break input feature, PWM outputs and
  13       complementary PWM outputs channels.
  14     - general-purpose timers consist of a 16-bit or 32-bit auto-reload counter
  15       driven by a programmable prescaler and PWM outputs.
  16     - basic timers consist of a 16-bit auto-reload counter driven by a
  17       programmable prescaler.
  18
  19 maintainers:
  20   - Benjamin Gaignard <benjamin.gaignard@st.com>
  21   - Fabrice Gasnier <fabrice.gasnier@st.com>
  22
  23 properties:
  24   compatible:
  25     const: st,stm32-timers
  26
  27   reg:
  28     maxItems: 1
  29
  30   clocks:
  31     maxItems: 1
  32
  33   clock-names:
  34     items:
  35       - const: int
  36
  37   reset:
  38     maxItems: 1
  39
  40   dmas:
  41     minItems: 1
  42     maxItems: 7
  43
  44   dma-names:
  45     items:
  46       enum: [ ch1, ch2, ch3, ch4, up, trig, com ]
  47     minItems: 1
  48     maxItems: 7
  49
  50   "#address-cells":
  51     const: 1
  52
  53   "#size-cells":
  54     const: 0
  55
  56   pwm:
  57     type: object
  58
  59     properties:
  60       compatible:
  61         const: st,stm32-pwm
  62
  63       "#pwm-cells":
  64         const: 3
  65
  66       st,breakinput:
  67         description:
  68           One or two <index level filter> to describe break input
  69           configurations.
  70         $ref: /schemas/types.yaml#/definitions/uint32-matrix
  71         items:
  72           items:
  73             - description: |
  74                 "index" indicates on which break input (0 or 1) the
  75                 configuration should be applied.
  76               enum: [0, 1]
  77             - description: |
  78                 "level" gives the active level (0=low or 1=high) of the
  79                 input signal for this configuration
  80               enum: [0, 1]
  81             - description: |
  82                 "filter" gives the filtering value (up to 15) to be applied.
  83               maximum: 15
  84         minItems: 1
  85         maxItems: 2
  86
  87     required:
  88       - "#pwm-cells"
  89       - compatible
  90
  91 patternProperties:
  92   "^timer@[0-9]+$":
  93     type: object
  94
  95     properties:
  96       compatible:
  97         enum:
  98           - st,stm32-timer-trigger
  99           - st,stm32h7-timer-trigger
 100
 101       reg:
 102         description: Identify trigger hardware block.
 103         items:
 104           minimum: 0
 105           maximum: 16
 106
 107     required:
 108       - compatible
 109       - reg
 110
 111   counter:
 112     type: object
 113
 114     properties:
 115       compatible:
 116         const: st,stm32-timer-counter
 117
 118     required:
 119       - compatible
 120
 121 required:
 122   - compatible
 123   - reg
 124   - clocks
 125   - clock-names
 126
 127 additionalProperties: false
 128
 129 examples:
 130   - |
 131     #include <dt-bindings/clock/stm32mp1-clks.h>
 132     timers2: timer@40000000 {
 133       #address-cells = <1>;
 134       #size-cells = <0>;
 135       compatible = "st,stm32-timers";
 136       reg = <0x40000000 0x400>;
 137       clocks = <&rcc TIM2_K>;
 138       clock-names = "int";
 139       dmas = <&dmamux1 18 0x400 0x1>,
 140              <&dmamux1 19 0x400 0x1>,
 141              <&dmamux1 20 0x400 0x1>,
 142              <&dmamux1 21 0x400 0x1>,
 143              <&dmamux1 22 0x400 0x1>;
 144       dma-names = "ch1", "ch2", "ch3", "ch4", "up";
 145       pwm {
 146         compatible = "st,stm32-pwm";
 147         #pwm-cells = <3>;
 148         st,breakinput = <0 1 5>;
 149       };
 150       timer@1 {
 151         compatible = "st,stm32-timer-trigger";
 152         reg = <1>;
 153       };
 154       counter {
 155         compatible = "st,stm32-timer-counter";
 156       };
 157     };
 158
 159 ...