Add DT bindings YAML schema for DMA controller driver of Lightning Mountain(LGM) SoC. Signed-off-by: Amireddy Mallikarjuna reddy <mallikarjunax.reddy@xxxxxxxxxxxxxxx> --- v1: - Initial version. v2: - Fix bot errors. v3: - No change. v4: - Address Thomas langer comments - use node name pattern as dma-controller as in common binding. - Remove "_" (underscore) in instance name. - Remove "port-" and "chan-" in attribute name for both 'dma-ports' & 'dma-channels' child nodes. v5: - Moved some of the attributes in 'dma-ports' & 'dma-channels' child nodes to dma client/consumer side as cells in 'dmas' properties. --- .../devicetree/bindings/dma/intel,ldma.yaml | 319 +++++++++++++++++++++ 1 file changed, 319 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/intel,ldma.yaml diff --git a/Documentation/devicetree/bindings/dma/intel,ldma.yaml b/Documentation/devicetree/bindings/dma/intel,ldma.yaml new file mode 100644 index 000000000000..9beaf191a6de --- /dev/null +++ b/Documentation/devicetree/bindings/dma/intel,ldma.yaml @@ -0,0 +1,319 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/intel,ldma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Lightning Mountain centralized low speed DMA and high speed DMA controllers. + +maintainers: + - chuanhua.lei@xxxxxxxxx + - mallikarjunax.reddy@xxxxxxxxx + +allOf: + - $ref: "dma-controller.yaml#" + +properties: + $nodename: + pattern: "^dma-controller(@.*)?$" + + "#dma-cells": + const: 1 + + compatible: + anyOf: + - const: intel,lgm-cdma + - const: intel,lgm-dma2tx + - const: intel,lgm-dma1rx + - const: intel,lgm-dma1tx + - const: intel,lgm-dma0tx + - const: intel,lgm-dma3 + - const: intel,lgm-toe-dma30 + - const: intel,lgm-toe-dma31 + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + + interrupts: + maxItems: 1 + + intel,dma-poll-cnt: + $ref: /schemas/types.yaml#definitions/uint32 + description: + DMA descriptor polling counter. It may need fine tune according + to the system application scenario. + + intel,dma-byte-en: + type: boolean + description: + DMA byte enable is only valid for DMA write(RX). + Byte enable(1) means DMA write will be based on the number of dwords + instead of the whole burst. + + intel,dma-drb: + type: boolean + description: + DMA descriptor read back to make sure data and desc synchronization. + + intel,dma-burst: + $ref: /schemas/types.yaml#definitions/uint32 + description: + Specifiy the DMA burst size(in dwords), the valid value will be 8, 16, 32. + Default is 16 for data path dma, 32 is for memcopy DMA. + + intel,dma-polling-cnt: + $ref: /schemas/types.yaml#definitions/uint32 + description: + DMA descriptor polling counter. It may need fine tune according to + the system application scenario. + + intel,dma-desc-in-sram: + type: boolean + description: + DMA descritpors in SRAM or not. Some old controllers descriptors + can be in DRAM or SRAM. The new ones are all in SRAM. + + intel,dma-orrc: + $ref: /schemas/types.yaml#definitions/uint32 + description: + DMA outstanding read counter. The maximum value is 16, and it may + need fine tune according to the system application scenarios. + + intel,dma-dburst-wr: + type: boolean + description: + Enable RX dynamic burst write. It only applies to RX DMA and memcopy DMA. + + + dma-ports: + type: object + description: + This sub-node must contain a sub-node for each DMA port. + properties: + '#address-cells': + const: 1 + '#size-cells': + const: 0 + + patternProperties: + "^dma-ports@[0-9]+$": + type: object + + properties: + reg: + items: + - enum: [0, 1, 2, 3, 4, 5] + description: + Which port this node refers to. + + intel,name: + $ref: /schemas/types.yaml#definitions/string-array + description: + Port name of each DMA port. + + intel,chans: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + The channels included on this port. Format is channel start + number and how many channels on this port. + + required: + - reg + - intel,name + - intel,chans + + + ldma-channels: + type: object + description: + This sub-node must contain a sub-node for each DMA channel. + properties: + '#address-cells': + const: 1 + '#size-cells': + const: 0 + + patternProperties: + "^ldma-channels@[0-15]+$": + type: object + + properties: + reg: + items: + - enum: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] + description: + Which channel this node refers to. + + intel,desc_num: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Per channel maximum descriptor number. The max value is 255. + + intel,hdr-mode: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + The first parameter is header mode size, the second + parameter is checksum enable or disable. If enabled, + header mode size is ignored. If disabled, header mode + size must be provided. + + intel,hw-desc: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + Per channel dma hardware descriptor configuration. + The first parameter is descriptor physical address and the + second parameter hardware descriptor number. + + required: + - reg + +required: + - compatible + - reg + - '#dma-cells' + +examples: + - | + dma0: dma-controller@e0e00000 { + compatible = "intel,lgm-cdma"; + reg = <0xe0e00000 0x1000>; + #dma-cells = <3>; + interrupt-parent = <&ioapic1>; + interrupts = <82 1>; + resets = <&rcu0 0x30 0>; + reset-names = "ctrl"; + clocks = <&cgu0 80>; + intel,dma-poll-cnt = <4>; + intel,dma-byte-en; + intel,dma-drb; + dma-ports { + #address-cells = <1>; + #size-cells = <0>; + + dma-ports@0 { + reg = <0>; + intel,name = "SPI0"; + intel,chans = <0 2>; + }; + dma-ports@1 { + reg = <1>; + intel,name = "SPI1"; + intel,chans = <2 2>; + }; + dma-ports@2 { + reg = <2>; + intel,name = "SPI2"; + intel,chans = <4 2>; + }; + dma-ports@3 { + reg = <3>; + intel,name = "SPI3"; + intel,chans = <6 2>; + }; + dma-ports@4 { + reg = <4>; + intel,name = "HSNAND"; + intel,chans = <8 2>; + }; + dma-ports@5 { + reg = <5>; + intel,name = "PCM"; + intel,chans = <10 6>; + }; + }; + ldma-channels { + #address-cells = <1>; + #size-cells = <0>; + + ldma-channels@0 { + reg = <0>; + intel,desc_num = <1>; + }; + ldma-channels@1 { + reg = <1>; + intel,desc_num = <1>; + }; + ldma-channels@2 { + reg = <2>; + intel,desc_num = <1>; + }; + ldma-channels@3 { + reg = <3>; + intel,desc_num = <1>; + }; + ldma-channels@4 { + reg = <4>; + intel,desc_num = <1>; + }; + ldma-channels@5 { + reg = <5>; + intel,desc_num = <1>; + }; + ldma-channels@6 { + reg = <6>; + intel,desc_num = <1>; + }; + ldma-channels@7 { + reg = <7>; + intel,desc_num = <1>; + }; + ldma-channels@8 { + reg = <8>; + }; + ldma-channels@9 { + reg = <9>; + }; + ldma-channels@10 { + reg = <10>; + }; + ldma-channels@11 { + reg = <11>; + }; + ldma-channels@12 { + reg = <12>; + }; + ldma-channels@13 { + reg = <13>; + }; + ldma-channels@14 { + reg = <14>; + }; + ldma-channels@15 { + reg = <15>; + }; + }; + }; + - | + dma3: dma-controller@ec800000 { + compatible = "intel,lgm-dma3"; + reg = <0xec800000 0x1000>; + clocks = <&cgu0 71>; + resets = <&rcu0 0x10 9>; + #dma-cells = <7>; + intel,dma-burst = <32>; + intel,dma-polling-cnt = <16>; + intel,dma-desc-in-sram; + intel,dma-orrc = <16>; + intel,dma-byte-en; + intel,dma-dburst-wr; + ldma-channels { + #address-cells = <1>; + #size-cells = <0>; + + ldma-channels@12 { + reg = <12>; + intel,hdr-mode = <128 0>; + intel,hw-desc = <0x20000000 8>; + }; + ldma-channels@13 { + reg = <13>; + intel,hdr-mode = <128 0>; + }; + }; + }; -- 2.11.0
