1*4882a593Smuzhiyun# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2*4882a593Smuzhiyun%YAML 1.2 3*4882a593Smuzhiyun--- 4*4882a593Smuzhiyun$id: http://devicetree.org/schemas/dma/socionext,uniphier-xdmac.yaml# 5*4882a593Smuzhiyun$schema: http://devicetree.org/meta-schemas/core.yaml# 6*4882a593Smuzhiyun 7*4882a593Smuzhiyuntitle: Socionext UniPhier external DMA controller 8*4882a593Smuzhiyun 9*4882a593Smuzhiyundescription: | 10*4882a593Smuzhiyun This describes the devicetree bindings for an external DMA engine to perform 11*4882a593Smuzhiyun memory-to-memory or peripheral-to-memory data transfer capable of supporting 12*4882a593Smuzhiyun 16 channels, implemented in Socionext UniPhier SoCs. 13*4882a593Smuzhiyun 14*4882a593Smuzhiyunmaintainers: 15*4882a593Smuzhiyun - Kunihiko Hayashi <hayashi.kunihiko@socionext.com> 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunallOf: 18*4882a593Smuzhiyun - $ref: "dma-controller.yaml#" 19*4882a593Smuzhiyun 20*4882a593Smuzhiyunproperties: 21*4882a593Smuzhiyun compatible: 22*4882a593Smuzhiyun const: socionext,uniphier-xdmac 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun reg: 25*4882a593Smuzhiyun maxItems: 1 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun interrupts: 28*4882a593Smuzhiyun maxItems: 1 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun "#dma-cells": 31*4882a593Smuzhiyun const: 2 32*4882a593Smuzhiyun description: | 33*4882a593Smuzhiyun DMA request from clients consists of 2 cells: 34*4882a593Smuzhiyun 1. Channel index 35*4882a593Smuzhiyun 2. Transfer request factor number, If no transfer factor, use 0. 36*4882a593Smuzhiyun The number is SoC-specific, and this should be specified with 37*4882a593Smuzhiyun relation to the device to use the DMA controller. 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun dma-channels: 40*4882a593Smuzhiyun minimum: 1 41*4882a593Smuzhiyun maximum: 16 42*4882a593Smuzhiyun 43*4882a593SmuzhiyunadditionalProperties: false 44*4882a593Smuzhiyun 45*4882a593Smuzhiyunrequired: 46*4882a593Smuzhiyun - compatible 47*4882a593Smuzhiyun - reg 48*4882a593Smuzhiyun - interrupts 49*4882a593Smuzhiyun - "#dma-cells" 50*4882a593Smuzhiyun - dma-channels 51*4882a593Smuzhiyun 52*4882a593Smuzhiyunexamples: 53*4882a593Smuzhiyun - | 54*4882a593Smuzhiyun xdmac: dma-controller@5fc10000 { 55*4882a593Smuzhiyun compatible = "socionext,uniphier-xdmac"; 56*4882a593Smuzhiyun reg = <0x5fc10000 0x5300>; 57*4882a593Smuzhiyun interrupts = <0 188 4>; 58*4882a593Smuzhiyun #dma-cells = <2>; 59*4882a593Smuzhiyun dma-channels = <16>; 60*4882a593Smuzhiyun }; 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun... 63