1ebd35674SAnson Huang# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2ebd35674SAnson Huang%YAML 1.2 3ebd35674SAnson Huang--- 4ebd35674SAnson Huang$id: http://devicetree.org/schemas/serial/fsl-imx-uart.yaml# 5ebd35674SAnson Huang$schema: http://devicetree.org/meta-schemas/core.yaml# 6ebd35674SAnson Huang 7ebd35674SAnson Huangtitle: Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART) 8ebd35674SAnson Huang 9ebd35674SAnson Huangmaintainers: 1081004f0bSFabio Estevam - Fabio Estevam <festevam@gmail.com> 11ebd35674SAnson Huang 12ebd35674SAnson HuangallOf: 13eec2c477SKrzysztof Kozlowski - $ref: serial.yaml# 14eec2c477SKrzysztof Kozlowski - $ref: rs485.yaml# 15ebd35674SAnson Huang 16ebd35674SAnson Huangproperties: 17ebd35674SAnson Huang compatible: 18ebd35674SAnson Huang oneOf: 19ebd35674SAnson Huang - const: fsl,imx1-uart 20ebd35674SAnson Huang - const: fsl,imx21-uart 21ebd35674SAnson Huang - items: 22ebd35674SAnson Huang - enum: 23ebd35674SAnson Huang - fsl,imx25-uart 24ebd35674SAnson Huang - fsl,imx27-uart 25ebd35674SAnson Huang - fsl,imx31-uart 26ebd35674SAnson Huang - fsl,imx35-uart 27ebd35674SAnson Huang - fsl,imx50-uart 28ebd35674SAnson Huang - fsl,imx51-uart 297a64ed02SKrzysztof Kozlowski - fsl,imx53-uart 307a64ed02SKrzysztof Kozlowski - fsl,imx6q-uart 31ebd35674SAnson Huang - const: fsl,imx21-uart 32ebd35674SAnson Huang - items: 33ebd35674SAnson Huang - enum: 34ebd35674SAnson Huang - fsl,imx6sl-uart 35ebd35674SAnson Huang - fsl,imx6sll-uart 36ebd35674SAnson Huang - fsl,imx6sx-uart 377a64ed02SKrzysztof Kozlowski - const: fsl,imx6q-uart 387a64ed02SKrzysztof Kozlowski - const: fsl,imx21-uart 397a64ed02SKrzysztof Kozlowski - items: 407a64ed02SKrzysztof Kozlowski - enum: 41ebd35674SAnson Huang - fsl,imx6ul-uart 42ebd35674SAnson Huang - fsl,imx7d-uart 43669e8aa3SKrzysztof Kozlowski - fsl,imx8mm-uart 44669e8aa3SKrzysztof Kozlowski - fsl,imx8mn-uart 45669e8aa3SKrzysztof Kozlowski - fsl,imx8mp-uart 46669e8aa3SKrzysztof Kozlowski - fsl,imx8mq-uart 47ebd35674SAnson Huang - const: fsl,imx6q-uart 48ebd35674SAnson Huang 49ebd35674SAnson Huang reg: 50ebd35674SAnson Huang maxItems: 1 51ebd35674SAnson Huang 52*cf8d4027SMarek Vasut dmas: 53*cf8d4027SMarek Vasut items: 54*cf8d4027SMarek Vasut - description: DMA controller phandle and request line for RX 55*cf8d4027SMarek Vasut - description: DMA controller phandle and request line for TX 56*cf8d4027SMarek Vasut 57*cf8d4027SMarek Vasut dma-names: 58*cf8d4027SMarek Vasut items: 59*cf8d4027SMarek Vasut - const: rx 60*cf8d4027SMarek Vasut - const: tx 61*cf8d4027SMarek Vasut 62ebd35674SAnson Huang interrupts: 63ebd35674SAnson Huang maxItems: 1 64ebd35674SAnson Huang 65ebd35674SAnson Huang fsl,dte-mode: 66ebd35674SAnson Huang $ref: /schemas/types.yaml#/definitions/flag 67ebd35674SAnson Huang description: | 68ebd35674SAnson Huang Indicate the uart works in DTE mode. The uart works in DCE mode by default. 69ebd35674SAnson Huang 70ebd35674SAnson Huang fsl,inverted-tx: 71ebd35674SAnson Huang $ref: /schemas/types.yaml#/definitions/flag 72ebd35674SAnson Huang description: | 73ebd35674SAnson Huang Indicate that the hardware attached to the peripheral inverts the signal 74ebd35674SAnson Huang transmitted, and that the peripheral should invert its output using the 75ebd35674SAnson Huang INVT registers. 76ebd35674SAnson Huang 77ebd35674SAnson Huang fsl,inverted-rx: 78ebd35674SAnson Huang $ref: /schemas/types.yaml#/definitions/flag 79ebd35674SAnson Huang description: | 80ebd35674SAnson Huang Indicate that the hardware attached to the peripheral inverts the signal 81ebd35674SAnson Huang received, and that the peripheral should invert its input using the 82ebd35674SAnson Huang INVR registers. 83ebd35674SAnson Huang 84db0a196bSFabien Lahoudere fsl,dma-info: 85db0a196bSFabien Lahoudere $ref: /schemas/types.yaml#/definitions/uint32-array 86db0a196bSFabien Lahoudere minItems: 2 87db0a196bSFabien Lahoudere maxItems: 2 88db0a196bSFabien Lahoudere description: | 89db0a196bSFabien Lahoudere First cell contains the size of DMA buffer chunks, second cell contains 90db0a196bSFabien Lahoudere the amount of chunks used for the device. Multiplying both numbers is 91db0a196bSFabien Lahoudere the total size of memory used for receiving data. 92db0a196bSFabien Lahoudere When not being configured the system will use default settings, which 93db0a196bSFabien Lahoudere are sensible for most use cases. If you need low latency processing on 94db0a196bSFabien Lahoudere slow connections this needs to be configured appropriately. 95db0a196bSFabien Lahoudere 96ebd35674SAnson Huangrequired: 97ebd35674SAnson Huang - compatible 98ebd35674SAnson Huang - reg 99ebd35674SAnson Huang - interrupts 100ebd35674SAnson Huang 101ebd35674SAnson HuangunevaluatedProperties: false 102ebd35674SAnson Huang 103ebd35674SAnson Huangexamples: 104ebd35674SAnson Huang - | 105ebd35674SAnson Huang aliases { 106ebd35674SAnson Huang serial0 = &uart1; 107ebd35674SAnson Huang }; 108ebd35674SAnson Huang 109ebd35674SAnson Huang uart1: serial@73fbc000 { 110ebd35674SAnson Huang compatible = "fsl,imx51-uart", "fsl,imx21-uart"; 111ebd35674SAnson Huang reg = <0x73fbc000 0x4000>; 112ebd35674SAnson Huang interrupts = <31>; 113*cf8d4027SMarek Vasut dmas = <&sdma 18 4 1>, <&sdma 19 4 2>; 114*cf8d4027SMarek Vasut dma-names = "rx", "tx"; 115ebd35674SAnson Huang uart-has-rtscts; 116ebd35674SAnson Huang fsl,dte-mode; 117ebd35674SAnson Huang }; 118