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PKTDMA V2 is introduced as part of AM62L. Signed-off-by: Sai Sree Kartheek Adivi --- .../bindings/dma/ti/ti,k3-pktdma-v2.yaml | 90 +++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/ti/ti,k3-pktdma-v2.yaml diff --git a/Documentation/devicetree/bindings/dma/ti/ti,k3-pktdma-v2.yaml b/Documentation/devicetree/bindings/dma/ti/ti,k3-pktdma-v2.yaml new file mode 100644 index 0000000000000..e8afa6f6738b7 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/ti/ti,k3-pktdma-v2.yaml @@ -0,0 +1,90 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) 2024-2025 Texas Instruments Incorporated +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/ti/ti,k3-pktdma-v2.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments K3 DMSS PKTDMA V2 + +maintainers: + - Sai Sree Kartheek Adivi + +description: | + The PKTDMA V2 is intended to perform similar functions as the packet mode + channels of K3 UDMA-P. PKTDMA V2 only includes Split channels 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-pktdma + + reg: + items: + - description: Packet DMA Control /Status + - description: Channel Realtime + - description: Ring Realtime + + reg-names: + items: + - const: gcfg + - const: chanrt + - const: ringrt + + "#dma-cells": + const: 2 + description: | + cell 1: Channel identification for the peripheral + 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. + + cell 2: ASEL value for the channel + +required: + - compatible + - reg + - reg-names + - "#dma-cells" + +unevaluatedProperties: false + +examples: + - | + main { + #address-cells = <2>; + #size-cells = <2>; + + main_pktdma: dma-controller@485c0000 { + compatible = "ti,am62l-dmss-pktdma"; + reg = <0x00 0x485c0000 0x00 0x4000>, + <0x00 0x48900000 0x00 0x80000>, + <0x00 0x47200000 0x00 0x100000>; + reg-names = "gcfg", "chanrt", "ringrt"; + #dma-cells = <2>; + }; + + serial@2800000 { + compatible = "ti,am64-uart", "ti,am654-uart"; + reg = <0x00 0x02800000 0x00 0x100>; + power-domains = <&scmi_pds 89>; + clocks = <&scmi_clk 358>; + clock-names = "fclk"; + dmas = <&main_pktdma 0xc400 0>, + /* tx: PSI-L thread ID, ASEL value */ + <&main_pktdma 0x4400 0>; + /* rx: PSI-L thread ID, ASEL value */ + dma-names = "tx", "rx"; + }; + }; -- 2.34.1