Documentation/devicetree/bindings/serial/st,stm32-uart.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/serial/st,stm32-uart.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 maintainers:
   8   - Erwan Le Ray <erwan.leray@st.com>
   9
  10 title: STMicroelectronics STM32 USART bindings
  11
  12 allOf:
  13   - $ref: rs485.yaml
  14
  15 properties:
  16   compatible:
  17     enum:
  18       - st,stm32-uart
  19       - st,stm32f7-uart
  20       - st,stm32h7-uart
  21
  22   reg:
  23     maxItems: 1
  24
  25   interrupts:
  26     maxItems: 1
  27
  28   clocks:
  29     maxItems: 1
  30
  31   resets:
  32     maxItems: 1
  33
  34   label:
  35     description: label associated with this uart
  36
  37   st,hw-flow-ctrl:
  38     description: enable hardware flow control
  39     $ref: /schemas/types.yaml#/definitions/flag
  40
  41   dmas:
  42     minItems: 1
  43     maxItems: 2
  44
  45   dma-names:
  46     items:
  47       enum: [ rx, tx ]
  48     minItems: 1
  49     maxItems: 2
  50
  51   cts-gpios:
  52     maxItems: 1
  53
  54   rts-gpios:
  55     maxItems: 1
  56
  57   wakeup-source: true
  58
  59   rs485-rts-delay: true
  60   rs485-rts-active-low: true
  61   linux,rs485-enabled-at-boot-time: true
  62   rs485-rx-during-tx: true
  63
  64 if:
  65   required:
  66     - st,hw-flow-ctrl
  67 then:
  68   properties:
  69     cts-gpios: false
  70     rts-gpios: false
  71
  72 required:
  73   - compatible
  74   - reg
  75   - interrupts
  76   - clocks
  77
  78 additionalProperties: false
  79
  80 examples:
  81   - |
  82     #include <dt-bindings/clock/stm32mp1-clks.h>
  83     usart1: serial@40011000 {
  84       compatible = "st,stm32-uart";
  85       reg = <0x40011000 0x400>;
  86       interrupts = <37>;
  87       clocks = <&rcc 0 164>;
  88       dmas = <&dma2 2 4 0x414 0x0>,
  89              <&dma2 7 4 0x414 0x0>;
  90       dma-names = "rx", "tx";
  91       rs485-rts-active-low;
  92     };
  93
  94 ...