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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 > + - description: Block Copy Channel Realtime > + - description: Channel Realtime > + - description: Ring Realtime > + > + reg-names: > + items: > + - const: gcfg > + - const: bchanrt > + - const: chanrt > + - const: ringrt > + > + "#dma-cells": > + const: 4 look like only this difference compare v3. can you consider to combine to one file Frank > + description: | > + cell 1: Channel operation mode > + 0 - split channel / 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 identification for the peripheral > + if cell 1 is 0 (split channel / no trigger): > + PSI-L thread ID of the remote (to BCDMA) end. > + Valid ranges for thread ID depends on the data movement direction: > + for source thread IDs (rx): 0 - 0x7fff > + for destination thread IDs (tx): 0x8000 - 0xffff > + > + Please refer to the device documentation for the PSI-L thread map and > + also the PSI-L peripheral chapter for the correct thread ID. > + > + if cell 1 is 1 or 2 or 3 (MEM_TO_MEM and/or trigger type): > + Unused, provide 0. > + > + cell 4: ASEL value for the channel > + > +required: > + - compatible > + - reg > + - reg-names > + - "#dma-cells" > + > +unevaluatedProperties: false > + > +examples: > + - | > + main { > + #address-cells = <2>; > + #size-cells = <2>; > + > + main_bcdma: dma-controller@485c4000 { > + compatible = "ti,am62l-dmss-bcdma"; > + reg = <0x00 0x485c4000 0x00 0x4000>, > + <0x00 0x48880000 0x00 0x10000>, > + <0x00 0x48800000 0x00 0x80000>, > + <0x00 0x47000000 0x00 0x200000>; > + reg-names = "gcfg", "bchanrt", "chanrt", "ringrt"; > + #dma-cells = <4>; > + }; > + > + crypto@40800000 { > + compatible = "ti,am62l-dthev2"; > + reg = <0x00 0x40800000 0x00 0x14000>; > + > + dmas = <&main_bcdma 0 0 0x4700 0>, > + /* rx: Split channel, no trigger, PSI-L thread id, ASEL value */ > + <&main_bcdma 0 0 0xc701 0>, > + /* tx1: Split channel, no trigger, PSI-L thread id, ASEL value */ > + <&main_bcdma 0 0 0xc700 0>; > + /* tx2: Split channel, no trigger, PSI-L thread id, ASEL value */ > + dma-names = "rx", "tx1", "tx2"; > + }; > + }; > -- > 2.34.1 >