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BCDMA V2 is introduced as part of AM62L. Signed-off-by: Sai Sree Kartheek Adivi Reviewed-by: Krzysztof Kozlowski --- .../bindings/dma/ti/ti,am62l-dmss-bcdma.yaml | 211 ++++++++++++++++++ 1 file changed, 211 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml diff --git a/Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml b/Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml new file mode 100644 index 0000000000000..76184485ebcba --- /dev/null +++ b/Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml @@ -0,0 +1,211 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) 2026 Texas Instruments Incorporated +# Author: Sai Sree Kartheek Adivi +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/ti/ti,am62l-dmss-bcdma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments K3 DMSS BCDMA V2 + +maintainers: + - Sai Sree Kartheek Adivi + +description: + The BCDMA V2 is intended to perform similar functions as the TR + mode channels of K3 UDMA-P. + BCDMA V2 includes block copy channels and Split channels. + + Block copy channels mainly used for memory to memory transfers, but with + optional triggers a block copy channel can service peripherals by accessing + directly to memory mapped registers or area. + + Split channels can be used to service PSI-L based peripherals. + The peripherals can be PSI-L native or legacy, non PSI-L native peripherals + with PDMAs. PDMA is tasked to act as a bridge between the PSI-L fabric and the + legacy peripheral. + +allOf: + - $ref: /schemas/dma/dma-controller.yaml# + +properties: + compatible: + const: ti,am62l-dmss-bcdma + + reg: + items: + - description: BCDMA Control & Status Registers region + - description: Block Copy Channel Realtime Registers region + - description: Channel Realtime Registers region + - description: Ring Realtime Registers region + + reg-names: + items: + - const: gcfg + - const: bchanrt + - const: chanrt + - const: ringrt + + "#dma-cells": + const: 4 + description: | + cell 1: Trigger type for the channel + 0 - disable / no trigger + 1 - internal channel event + 2 - external signal + 3 - timer manager event + + cell 2: parameter for the trigger: + if cell 1 is 0 (disable / no trigger): + Unused, ignored + if cell 1 is 1 (internal channel event): + channel number whose TR event should trigger the current channel. + if cell 1 is 2 or 3 (external signal or timer manager event): + index of global interfaces that come into the DMA. + + Please refer to the device documentation for global interface indexes. + + cell 3: Channel ID for the peripheral + This is the mapped_channel_id assigned to the peripheral in the PSI-L + endpoint map. For XYMF peripherals (SPI, CRC32) each chip-select/FIFO + has a distinct channel ID; use the channel ID for the specific + direction and chip-select being requested. Use 0 for triggered + block-copy channels (cell 1 != 0). + + Please refer to the device documentation for the channel map. + + cell 4: ASEL value for the channel + + interrupts: + maxItems: 75 + description: + Interrupts for DMA channels. + + interrupt-names: + minItems: 75 + maxItems: 75 + items: + pattern: "^chan([0-9]|1[0-3]|1[6-9]|2[0-9]|3[0-9]|4[0-7]|4[89]|5[0-3]|6[4-8]|8[01]|12[89]|13[0-9]|14[0-3])$" + description: + The name of the interrupt corresponding to the DMA channel. + +required: + - compatible + - reg + - reg-names + - "#dma-cells" + - interrupts + - interrupt-names + +unevaluatedProperties: false + +examples: + - | + #include + #include + + dma-controller@485c4000 { + compatible = "ti,am62l-dmss-bcdma"; + reg = <0x485c4000 0x4000>, + <0x48880000 0x10000>, + <0x48800000 0x80000>, + <0x47000000 0x200000>; + reg-names = "gcfg", "bchanrt", "chanrt", "ringrt"; + + #dma-cells = <4>; + + interrupts = , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + , + ; + interrupt-names = "chan0", "chan1", "chan2", "chan3", "chan4", + "chan5", "chan6", "chan7", "chan8", "chan9", + "chan10", "chan11", "chan12", "chan13", + "chan16", "chan17", "chan18", "chan19", + "chan20", "chan21", "chan22", "chan23", + "chan24", "chan25", "chan26", "chan27", + "chan28", "chan29", "chan30", "chan31", + "chan32", "chan33", "chan34", "chan35", + "chan36", "chan37", "chan38", "chan39", + "chan40", "chan41", "chan42", "chan43", + "chan44", "chan45", "chan46", "chan47", + "chan48", "chan49", "chan50", "chan51", + "chan52", "chan53", "chan64", "chan65", + "chan66", "chan80", "chan81", "chan67", + "chan68", "chan128", "chan129", "chan130", + "chan131", "chan132", "chan133", "chan134", + "chan135", "chan136", "chan137", "chan138", + "chan139", "chan140", "chan141", "chan142", + "chan143"; + }; -- 2.54.0