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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/arm-pl08x.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ARM PrimeCells PL080 and PL081 and derivatives DMA controller
maintainers:
- Vinod Koul <vkoul@kernel.org>
allOf:
- $ref: "dma-controller.yaml#"
# We need a select here so we don't match all nodes with 'arm,primecell'
select:
properties:
compatible:
contains:
enum:
- arm,pl080
- arm,pl081
required:
- compatible
properties:
compatible:
oneOf:
- items:
- enum:
- arm,pl080
- arm,pl081
- const: arm,primecell
- items:
- const: faraday,ftdma020
- const: arm,pl080
- const: arm,primecell
reg:
maxItems: 1
description: Address range of the PL08x registers
interrupts:
minItems: 1
description: The PL08x interrupt number
clocks:
minItems: 1
description: The clock running the IP core clock
clock-names:
maxItems: 1
lli-bus-interface-ahb1:
type: boolean
description: if AHB master 1 is eligible for fetching LLIs
lli-bus-interface-ahb2:
type: boolean
description: if AHB master 2 is eligible for fetching LLIs
mem-bus-interface-ahb1:
type: boolean
description: if AHB master 1 is eligible for fetching memory contents
mem-bus-interface-ahb2:
type: boolean
description: if AHB master 2 is eligible for fetching memory contents
memcpy-burst-size:
$ref: /schemas/types.yaml#/definitions/uint32
enum:
- 1
- 4
- 8
- 16
- 32
- 64
- 128
- 256
description: the size of the bursts for memcpy
memcpy-bus-width:
$ref: /schemas/types.yaml#/definitions/uint32
enum:
- 8
- 16
- 32
- 64
description: bus width used for memcpy in bits. FTDMAC020 also accept 64 bits
required:
- reg
- interrupts
- clocks
- clock-names
- "#dma-cells"
unevaluatedProperties: false
examples:
- |
dmac0: dma-controller@10130000 {
compatible = "arm,pl080", "arm,primecell";
reg = <0x10130000 0x1000>;
interrupt-parent = <&vica>;
interrupts = <15>;
clocks = <&hclkdma0>;
clock-names = "apb_pclk";
lli-bus-interface-ahb1;
lli-bus-interface-ahb2;
mem-bus-interface-ahb2;
memcpy-burst-size = <256>;
memcpy-bus-width = <32>;
#dma-cells = <2>;
};
- |
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/reset/cortina,gemini-reset.h>
#include <dt-bindings/clock/cortina,gemini-clock.h>
dma-controller@67000000 {
compatible = "faraday,ftdma020", "arm,pl080", "arm,primecell";
/* Faraday Technology FTDMAC020 variant */
arm,primecell-periphid = <0x0003b080>;
reg = <0x67000000 0x1000>;
interrupts = <9 IRQ_TYPE_EDGE_RISING>;
resets = <&syscon GEMINI_RESET_DMAC>;
clocks = <&syscon GEMINI_CLK_AHB>;
clock-names = "apb_pclk";
/* Bus interface AHB1 (AHB0) is totally tilted */
lli-bus-interface-ahb2;
mem-bus-interface-ahb2;
memcpy-burst-size = <256>;
memcpy-bus-width = <32>;
#dma-cells = <2>;
};
|
