mirror of
https://github.com/torvalds/linux.git
synced 2026-04-19 23:34:00 -04:00
72b22006ba
Add new compatible name microchip,mpfs-pdma to support out of order dma transfers Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Shravan Chippa <shravan.chippa@microchip.com> Link: https://lore.kernel.org/r/20231208103856.3732998-3-shravan.chippa@microchip.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
76 lines
1.8 KiB
YAML
76 lines
1.8 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/dma/sifive,fu540-c000-pdma.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: SiFive Unleashed Rev C000 Platform DMA
|
|
|
|
maintainers:
|
|
- Green Wan <green.wan@sifive.com>
|
|
- Palmer Debbelt <palmer@sifive.com>
|
|
- Paul Walmsley <paul.walmsley@sifive.com>
|
|
|
|
description: |
|
|
Platform DMA is a DMA engine of SiFive Unleashed. It supports 4
|
|
channels. Each channel has 2 interrupts. One is for DMA done and
|
|
the other is for DME error.
|
|
|
|
In different SoC, DMA could be attached to different IRQ line.
|
|
DT file need to be changed to meet the difference. For technical
|
|
doc,
|
|
|
|
https://static.dev.sifive.com/FU540-C000-v1.0.pdf
|
|
|
|
allOf:
|
|
- $ref: dma-controller.yaml#
|
|
|
|
properties:
|
|
compatible:
|
|
items:
|
|
- enum:
|
|
- microchip,mpfs-pdma
|
|
- sifive,fu540-c000-pdma
|
|
- const: sifive,pdma0
|
|
description:
|
|
Should be "sifive,<chip>-pdma" and "sifive,pdma<version>".
|
|
Supported compatible strings are -
|
|
"sifive,fu540-c000-pdma" for the SiFive PDMA v0 as integrated onto the
|
|
SiFive FU540 chip resp and "sifive,pdma0" for the SiFive PDMA v0 IP block
|
|
with no chip integration tweaks.
|
|
|
|
reg:
|
|
maxItems: 1
|
|
|
|
interrupts:
|
|
minItems: 1
|
|
maxItems: 8
|
|
|
|
dma-channels:
|
|
description: For backwards-compatibility, the default value is 4
|
|
minimum: 1
|
|
maximum: 4
|
|
default: 4
|
|
|
|
'#dma-cells':
|
|
const: 1
|
|
|
|
required:
|
|
- compatible
|
|
- reg
|
|
- interrupts
|
|
|
|
unevaluatedProperties: false
|
|
|
|
examples:
|
|
- |
|
|
dma-controller@3000000 {
|
|
compatible = "sifive,fu540-c000-pdma", "sifive,pdma0";
|
|
reg = <0x3000000 0x8000>;
|
|
dma-channels = <4>;
|
|
interrupts = <23>, <24>, <25>, <26>, <27>, <28>, <29>, <30>;
|
|
#dma-cells = <1>;
|
|
};
|
|
|
|
...
|