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/Linux-v5.15/Documentation/devicetree/bindings/dma/
Dti-dma-crossbar.txt1 Texas Instruments DMA Crossbar (DMA request router)
4 - compatible: "ti,dra7-dma-crossbar" for DRA7xx DMA crossbar
5 "ti,am335x-edma-crossbar" for AM335x and AM437x
6 - reg: Memory map for accessing module
7 - #dma-cells: Should be set to to match with the DMA controller's dma-cells
8 for ti,dra7-dma-crossbar and <3> for ti,am335x-edma-crossbar.
9 - dma-requests: Number of DMA requests the crossbar can receive
10 - dma-masters: phandle pointing to the DMA controller
12 The DMA controller node need to have the following poroperties:
13 - dma-requests: Number of DMA requests the controller can handle
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Ddma-router.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/dma/dma-router.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: DMA Router Generic Binding
10 - Vinod Koul <vkoul@kernel.org>
13 - $ref: "dma-common.yaml#"
16 DMA routers are transparent IP blocks used to route DMA request
17 lines from devices to the DMA controller. Some SoCs (like TI DRA7x)
18 have more peripherals integrated with DMA requests than what the DMA
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/Linux-v5.15/arch/arm/boot/dts/
Ddra7.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/
8 #include <dt-bindings/bus/ti-sysc.h>
9 #include <dt-bindings/clock/dra7.h>
10 #include <dt-bindings/interrupt-controller/arm-gic.h>
11 #include <dt-bindings/pinctrl/dra.h>
12 #include <dt-bindings/clock/dra7.h>
17 #address-cells = <2>;
18 #size-cells = <2>;
21 interrupt-parent = <&crossbar_mpu>;
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Ddra7-l4.dtsi2 compatible = "ti,dra7-l4-cfg", "simple-pm-bus";
3 power-domains = <&prm_coreaon>;
5 clock-names = "fck";
9 reg-names = "ap", "la", "ia0";
10 #address-cells = <1>;
11 #size-cells = <1>;
17 compatible = "simple-pm-bus";
18 #address-cells = <1>;
19 #size-cells = <1>;
50 target-module@2000 { /* 0x4a002000, ap 3 08.0 */
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/Linux-v5.15/drivers/dma/ti/
Ddma-crossbar.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
24 .compatible = "ti,dra7-dma-crossbar",
28 .compatible = "ti,am335x-edma-crossbar",
34 /* Crossbar on AM335x/AM437x family */
43 u32 dma_requests; /* number of DMA requests on eDMA */
59 writeb_relaxed(val, iomem + (63 - event % 4)); in ti_am335x_xbar_write()
70 map->mux_val, map->dma_line); in ti_am335x_xbar_free()
72 ti_am335x_xbar_write(xbar->iomem, map->dma_line, 0); in ti_am335x_xbar_free()
79 struct platform_device *pdev = of_find_device_by_node(ofdma->of_node); in ti_am335x_xbar_route_allocate()
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/Linux-v5.15/
DMAINTAINERS9 -------------------------
30 ``diff -u`` to make the patch easy to merge. Be prepared to get your
40 See Documentation/process/coding-style.rst for guidance here.
46 See Documentation/process/submitting-patches.rst for details.
57 include a Signed-off-by: line. The current version of this
59 Documentation/process/submitting-patches.rst.
70 that the bug would present a short-term risk to other users if it
76 Documentation/admin-guide/security-bugs.rst for details.
81 ---------------------------------------------------
97 W: *Web-page* with status/info
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