# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id:
http://devicetree.org/schemas/dma/qcom,bam-dma.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: Qualcomm Technologies Inc BAM DMA controller
maintainers:
- Andy Gross <agross@kernel.org>
- Bjorn Andersson <andersson@kernel.org>
allOf:
- $ref: dma-controller.yaml#
properties:
compatible:
oneOf:
- enum:
# APQ8064, IPQ8064 and MSM8960
- qcom,bam-v1.3.0
# MSM8974, APQ8074 and APQ8084
- qcom,bam-v1.4.0
# MSM8916, SDM630
- qcom,bam-v1.7.0
- items:
- enum:
# SDM845, SM6115, SM8150, SM8250 and QCM2290
- qcom,bam-v1.7.4
- const: qcom,bam-v1.7.0
clocks:
maxItems: 1
clock-names:
items:
- const: bam_clk
"#dma-cells":
const: 1
interrupts:
maxItems: 1
dma-coherent: true
iommus:
minItems: 1
maxItems: 6
num-channels:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Indicates supported number of DMA channels in a remotely controlled bam.
qcom,controlled-remotely:
type: boolean
description:
Indicates that the bam is controlled by remote processor i.e. execution
environment.
qcom,ee:
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 7
description:
Indicates the active Execution Environment identifier (0-7) used in the
secure world.
qcom,num-ees:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Indicates supported number of Execution Environments in a remotely
controlled bam.
qcom,powered-remotely:
type: boolean
description:
Indicates that the bam is powered up by a remote processor but must be
initialized by the local processor.
reg:
maxItems: 1
required:
- compatible
- "#dma-cells"
- interrupts
- qcom,ee
- reg
anyOf:
- required:
- qcom,powered-remotely
- num-channels
- qcom,num-ees
- required:
- qcom,controlled-remotely
- num-channels
- qcom,num-ees
- required:
- clocks
- clock-names
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/qcom,gcc-msm8974.h>
dma-controller@f9944000 {
compatible = "qcom,bam-v1.4.0";
reg = <0xf9944000 0x19000>;
interrupts = <GIC_SPI 239 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&gcc GCC_BLSP2_AHB_CLK>;
clock-names = "bam_clk";
#dma-cells = <1>;
qcom,ee = <0>;
};
...
