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authorLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 12:41:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 12:41:36 -0700
commitce615f5c1f73537c8267035d58b3d0c70e19b8da (patch)
tree54b8e1d34536eed62d898e7d9e81779f6728d286 /Documentation/devicetree/bindings/dma/snps-dma.txt
parent81e11336d97e7a4c25a65c302ef2bf9cd9808ed4 (diff)
parent00043a2689232631f39ebbf6719d545b1d799086 (diff)
downloadlinux-ce615f5c1f73537c8267035d58b3d0c70e19b8da.tar.bz2
Merge tag 'dmaengine-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine
Pull dmaengine updates from Vinod Koul: "Core: - Support out of order dma completion - Support for repeating transaction New controllers: - Support for Actions S700 DMA engine - Renesas R8A774E1, r8a7742 controller binding - New driver for Xilinx DPDMA controller Other: - Support of out of order dma completion in idxd driver - W=1 warning cleanup of subsystem - Updates to ti-k3-dma, dw, idxd drivers" * tag 'dmaengine-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (68 commits) dmaengine: dw: Don't include unneeded header to platform data header dmaengine: Actions: Add support for S700 DMA engine dmaengine: Actions: get rid of bit fields from dma descriptor dt-bindings: dmaengine: convert Actions Semi Owl SoCs bindings to yaml dmaengine: idxd: add missing invalid flags field to completion dmaengine: dw: Initialize max_sg_burst capability dmaengine: dw: Introduce max burst length hw config dmaengine: dw: Initialize min and max burst DMA device capability dmaengine: dw: Set DMA device max segment size parameter dmaengine: dw: Take HC_LLP flag into account for noLLP auto-config dmaengine: Introduce DMA-device device_caps callback dmaengine: Introduce max SG burst capability dmaengine: Introduce min burst length capability dt-bindings: dma: dw: Add max burst transaction length property dt-bindings: dma: dw: Convert DW DMAC to DT binding dmaengine: ti: k3-udma: Query throughput level information from hardware dmaengine: ti: k3-udma: Use defines for capabilities register parsing dmaengine: xilinx: dpdma: Fix kerneldoc warning dmaengine: xilinx: dpdma: add missing kernel doc dmaengine: xilinx: dpdma: remove comparison of unsigned expression ...
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-* Synopsys Designware DMA Controller
-
-Required properties:
-- compatible: "snps,dma-spear1340"
-- reg: Address range of the DMAC registers
-- interrupt: Should contain the DMAC interrupt number
-- dma-channels: Number of channels supported by hardware
-- dma-requests: Number of DMA request lines supported, up to 16
-- dma-masters: Number of AHB masters supported by the controller
-- #dma-cells: must be <3>
-- chan_allocation_order: order of allocation of channel, 0 (default): ascending,
- 1: descending
-- chan_priority: priority of channels. 0 (default): increase from chan 0->n, 1:
- increase from chan n->0
-- block_size: Maximum block size supported by the controller
-- data-width: Maximum data width supported by hardware per AHB master
- (in bytes, power of 2)
-
-
-Deprecated properties:
-- data_width: Maximum data width supported by hardware per AHB master
- (0 - 8bits, 1 - 16bits, ..., 5 - 256bits)
-
-
-Optional properties:
-- multi-block: Multi block transfers supported by hardware. Array property with
- one cell per channel. 0: not supported, 1 (default): supported.
-- snps,dma-protection-control: AHB HPROT[3:1] protection setting.
- The default value is 0 (for non-cacheable, non-buffered,
- unprivileged data access).
- Refer to include/dt-bindings/dma/dw-dmac.h for possible values.
-
-Example:
-
- dmahost: dma@fc000000 {
- compatible = "snps,dma-spear1340";
- reg = <0xfc000000 0x1000>;
- interrupt-parent = <&vic1>;
- interrupts = <12>;
-
- dma-channels = <8>;
- dma-requests = <16>;
- dma-masters = <2>;
- #dma-cells = <3>;
- chan_allocation_order = <1>;
- chan_priority = <1>;
- block_size = <0xfff>;
- data-width = <8 8>;
- };
-
-DMA clients connected to the Designware DMA controller must use the format
-described in the dma.txt file, using a four-cell specifier for each channel.
-The four cells in order are:
-
-1. A phandle pointing to the DMA controller
-2. The DMA request line number
-3. Memory master for transfers on allocated channel
-4. Peripheral master for transfers on allocated channel
-
-Example:
-
- serial@e0000000 {
- compatible = "arm,pl011", "arm,primecell";
- reg = <0xe0000000 0x1000>;
- interrupts = <0 35 0x4>;
- dmas = <&dmahost 12 0 1>,
- <&dmahost 13 1 0>;
- dma-names = "rx", "rx";
- };