162306a36Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci%YAML 1.2 362306a36Sopenharmony_ci--- 462306a36Sopenharmony_ci$id: http://devicetree.org/schemas/dma/dma-common.yaml# 562306a36Sopenharmony_ci$schema: http://devicetree.org/meta-schemas/core.yaml# 662306a36Sopenharmony_ci 762306a36Sopenharmony_cititle: DMA Engine Common Properties 862306a36Sopenharmony_ci 962306a36Sopenharmony_cimaintainers: 1062306a36Sopenharmony_ci - Vinod Koul <vkoul@kernel.org> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_cidescription: 1362306a36Sopenharmony_ci Generic binding to provide a way for a driver using DMA Engine to 1462306a36Sopenharmony_ci retrieve the DMA request or channel information that goes from a 1562306a36Sopenharmony_ci hardware device to a DMA controller. 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ciselect: false 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ciproperties: 2062306a36Sopenharmony_ci "#dma-cells": 2162306a36Sopenharmony_ci minimum: 1 2262306a36Sopenharmony_ci # Should be enough 2362306a36Sopenharmony_ci maximum: 255 2462306a36Sopenharmony_ci description: 2562306a36Sopenharmony_ci Used to provide DMA controller specific information. 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci dma-channel-mask: 2862306a36Sopenharmony_ci description: 2962306a36Sopenharmony_ci Bitmask of available DMA channels in ascending order that are 3062306a36Sopenharmony_ci not reserved by firmware and are available to the 3162306a36Sopenharmony_ci kernel. i.e. first channel corresponds to LSB. 3262306a36Sopenharmony_ci The first item in the array is for channels 0-31, the second is for 3362306a36Sopenharmony_ci channels 32-63, etc. 3462306a36Sopenharmony_ci $ref: /schemas/types.yaml#/definitions/uint32-array 3562306a36Sopenharmony_ci items: 3662306a36Sopenharmony_ci minItems: 1 3762306a36Sopenharmony_ci # Should be enough 3862306a36Sopenharmony_ci maxItems: 255 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci dma-channels: 4162306a36Sopenharmony_ci $ref: /schemas/types.yaml#/definitions/uint32 4262306a36Sopenharmony_ci description: 4362306a36Sopenharmony_ci Number of DMA channels supported by the controller. 4462306a36Sopenharmony_ci 4562306a36Sopenharmony_ci dma-requests: 4662306a36Sopenharmony_ci $ref: /schemas/types.yaml#/definitions/uint32 4762306a36Sopenharmony_ci description: 4862306a36Sopenharmony_ci Number of DMA request signals supported by the controller. 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_cirequired: 5162306a36Sopenharmony_ci - "#dma-cells" 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_ciadditionalProperties: true 54