projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 53633a89 TR |
1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | %YAML 1.2 | |
| 3 | --- | |
| 4 | $id: http://devicetree.org/schemas/dma/sifive,fu540-c000-pdma.yaml# | |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# | |
| 6 | ||
| 7 | title: SiFive Unleashed Rev C000 Platform DMA | |
| 8 | ||
| 9 | maintainers: | |
| 10 | - Green Wan <green.wan@sifive.com> | |
| 11 | - Palmer Debbelt <palmer@sifive.com> | |
| 12 | - Paul Walmsley <paul.walmsley@sifive.com> | |
| 13 | ||
| 14 | description: | | |
| 15 | Platform DMA is a DMA engine of SiFive Unleashed. It supports 4 | |
| 16 | channels. Each channel has 2 interrupts. One is for DMA done and | |
| 17 | the other is for DME error. | |
| 18 | ||
| 19 | In different SoC, DMA could be attached to different IRQ line. | |
| 20 | DT file need to be changed to meet the difference. For technical | |
| 21 | doc, | |
| 22 | ||
| 23 | https://static.dev.sifive.com/FU540-C000-v1.0.pdf | |
| 24 | ||
| 25 | allOf: | |
| 26 | - $ref: dma-controller.yaml# | |
| 27 | ||
| 28 | properties: | |
| 29 | compatible: | |
| 30 | items: | |
| 31 | - enum: | |
| 93743d24 | 32 | - microchip,mpfs-pdma |
| 53633a89 TR |
33 | - sifive,fu540-c000-pdma |
| 34 | - const: sifive,pdma0 | |
| 35 | description: | |
| 36 | Should be "sifive,<chip>-pdma" and "sifive,pdma<version>". | |
| 37 | Supported compatible strings are - | |
| 38 | "sifive,fu540-c000-pdma" for the SiFive PDMA v0 as integrated onto the | |
| 39 | SiFive FU540 chip resp and "sifive,pdma0" for the SiFive PDMA v0 IP block | |
| 40 | with no chip integration tweaks. | |
| 41 | ||
| 42 | reg: | |
| 43 | maxItems: 1 | |
| 44 | ||
| 45 | interrupts: | |
| 46 | minItems: 1 | |
| 47 | maxItems: 8 | |
| 48 | ||
| 49 | dma-channels: | |
| 50 | description: For backwards-compatibility, the default value is 4 | |
| 51 | minimum: 1 | |
| 52 | maximum: 4 | |
| 53 | default: 4 | |
| 54 | ||
| 55 | '#dma-cells': | |
| 56 | const: 1 | |
| 57 | ||
| 58 | required: | |
| 59 | - compatible | |
| 60 | - reg | |
| 61 | - interrupts | |
| 62 | ||
| 63 | unevaluatedProperties: false | |
| 64 | ||
| 65 | examples: | |
| 66 | - | | |
| 67 | dma-controller@3000000 { | |
| 68 | compatible = "sifive,fu540-c000-pdma", "sifive,pdma0"; | |
| 69 | reg = <0x3000000 0x8000>; | |
| 70 | dma-channels = <4>; | |
| 71 | interrupts = <23>, <24>, <25>, <26>, <27>, <28>, <29>, <30>; | |
| 72 | #dma-cells = <1>; | |
| 73 | }; | |
| 74 | ||
| 75 | ... |