| Tom Rini | 6b642ac | 2024-10-01 12:20:28 -0600 | [diff] [blame^] | 1 | # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/dma/sprd,sc9860-dma.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Spreadtrum SC9860 DMA controller |
| 8 | |
| 9 | description: | |
| 10 | There are three DMA controllers: AP DMA, AON DMA and AGCP DMA. For AGCP |
| 11 | DMA controller, it can or do not request the IRQ, which will save |
| 12 | system power without resuming system by DMA interrupts if AGCP DMA |
| 13 | does not request the IRQ. |
| 14 | |
| 15 | maintainers: |
| 16 | - Orson Zhai <orsonzhai@gmail.com> |
| 17 | - Baolin Wang <baolin.wang7@gmail.com> |
| 18 | - Chunyan Zhang <zhang.lyra@gmail.com> |
| 19 | |
| 20 | properties: |
| 21 | compatible: |
| 22 | const: sprd,sc9860-dma |
| 23 | |
| 24 | reg: |
| 25 | maxItems: 1 |
| 26 | |
| 27 | interrupts: |
| 28 | maxItems: 1 |
| 29 | |
| 30 | clocks: |
| 31 | minItems: 1 |
| 32 | items: |
| 33 | - description: DMA enable clock |
| 34 | - description: optional ashb_eb clock, only for the AGCP DMA controller |
| 35 | |
| 36 | clock-names: |
| 37 | minItems: 1 |
| 38 | items: |
| 39 | - const: enable |
| 40 | - const: ashb_eb |
| 41 | |
| 42 | '#dma-cells': |
| 43 | const: 1 |
| 44 | |
| 45 | dma-channels: |
| 46 | const: 32 |
| 47 | |
| 48 | '#dma-channels': |
| 49 | const: 32 |
| 50 | deprecated: true |
| 51 | |
| 52 | required: |
| 53 | - compatible |
| 54 | - reg |
| 55 | - clocks |
| 56 | - clock-names |
| 57 | - '#dma-cells' |
| 58 | - dma-channels |
| 59 | |
| 60 | allOf: |
| 61 | - $ref: dma-controller.yaml# |
| 62 | |
| 63 | unevaluatedProperties: false |
| 64 | |
| 65 | examples: |
| 66 | - | |
| 67 | #include <dt-bindings/clock/sprd,sc9860-clk.h> |
| 68 | #include <dt-bindings/interrupt-controller/arm-gic.h> |
| 69 | #include <dt-bindings/interrupt-controller/irq.h> |
| 70 | |
| 71 | /* AP DMA controller */ |
| 72 | dma-controller@20100000 { |
| 73 | compatible = "sprd,sc9860-dma"; |
| 74 | reg = <0x20100000 0x4000>; |
| 75 | interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>; |
| 76 | clocks = <&apahb_gate CLK_DMA_EB>; |
| 77 | clock-names = "enable"; |
| 78 | #dma-cells = <1>; |
| 79 | dma-channels = <32>; |
| 80 | }; |
| 81 | |
| 82 | /* AGCP DMA controller */ |
| 83 | dma-controller@41580000 { |
| 84 | compatible = "sprd,sc9860-dma"; |
| 85 | reg = <0x41580000 0x4000>; |
| 86 | clocks = <&agcp_gate CLK_AGCP_DMAAP_EB>, |
| 87 | <&agcp_gate CLK_AGCP_AP_ASHB_EB>; |
| 88 | clock-names = "enable", "ashb_eb"; |
| 89 | #dma-cells = <1>; |
| 90 | dma-channels = <32>; |
| 91 | }; |
| 92 | ... |