fsl-imx-uart.yaml (3033B)
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/serial/fsl-imx-uart.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART) 8 9maintainers: 10 - Fabio Estevam <festevam@gmail.com> 11 12allOf: 13 - $ref: "serial.yaml" 14 - $ref: "rs485.yaml" 15 16properties: 17 compatible: 18 oneOf: 19 - const: fsl,imx1-uart 20 - const: fsl,imx21-uart 21 - items: 22 - enum: 23 - fsl,imx25-uart 24 - fsl,imx27-uart 25 - fsl,imx31-uart 26 - fsl,imx35-uart 27 - fsl,imx50-uart 28 - fsl,imx51-uart 29 - fsl,imx53-uart 30 - fsl,imx6q-uart 31 - const: fsl,imx21-uart 32 - items: 33 - enum: 34 - fsl,imx6sl-uart 35 - fsl,imx6sll-uart 36 - fsl,imx6sx-uart 37 - const: fsl,imx6q-uart 38 - const: fsl,imx21-uart 39 - items: 40 - enum: 41 - fsl,imx6ul-uart 42 - fsl,imx7d-uart 43 - fsl,imx8mm-uart 44 - fsl,imx8mn-uart 45 - fsl,imx8mp-uart 46 - fsl,imx8mq-uart 47 - const: fsl,imx6q-uart 48 49 reg: 50 maxItems: 1 51 52 interrupts: 53 maxItems: 1 54 55 fsl,dte-mode: 56 $ref: /schemas/types.yaml#/definitions/flag 57 description: | 58 Indicate the uart works in DTE mode. The uart works in DCE mode by default. 59 60 fsl,inverted-tx: 61 $ref: /schemas/types.yaml#/definitions/flag 62 description: | 63 Indicate that the hardware attached to the peripheral inverts the signal 64 transmitted, and that the peripheral should invert its output using the 65 INVT registers. 66 67 fsl,inverted-rx: 68 $ref: /schemas/types.yaml#/definitions/flag 69 description: | 70 Indicate that the hardware attached to the peripheral inverts the signal 71 received, and that the peripheral should invert its input using the 72 INVR registers. 73 74 fsl,dma-info: 75 $ref: /schemas/types.yaml#/definitions/uint32-array 76 minItems: 2 77 maxItems: 2 78 description: | 79 First cell contains the size of DMA buffer chunks, second cell contains 80 the amount of chunks used for the device. Multiplying both numbers is 81 the total size of memory used for receiving data. 82 When not being configured the system will use default settings, which 83 are sensible for most use cases. If you need low latency processing on 84 slow connections this needs to be configured appropriately. 85 86 uart-has-rtscts: true 87 88 rs485-rts-delay: true 89 rs485-rts-active-low: true 90 rs485-rx-during-tx: true 91 linux,rs485-enabled-at-boot-time: true 92 93required: 94 - compatible 95 - reg 96 - interrupts 97 98unevaluatedProperties: false 99 100examples: 101 - | 102 aliases { 103 serial0 = &uart1; 104 }; 105 106 uart1: serial@73fbc000 { 107 compatible = "fsl,imx51-uart", "fsl,imx21-uart"; 108 reg = <0x73fbc000 0x4000>; 109 interrupts = <31>; 110 uart-has-rtscts; 111 fsl,dte-mode; 112 };