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authorSascha Hauer <s.hauer@pengutronix.de>2020-06-23 12:14:59 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2020-07-05 20:49:06 +0200
commitabef60363d8ecac66e45853f328afa8eeb9e00fd (patch)
treec7d6f1dcf0ef5154b9182da86f1acad048cb7da1 /dts/Bindings/dma/jz4780-dma.txt
parente307bc559a2830b7f695150212ea1b26cdca69fb (diff)
downloadbarebox-abef60363d8ecac66e45853f328afa8eeb9e00fd.tar.gz
barebox-abef60363d8ecac66e45853f328afa8eeb9e00fd.tar.xz
dts: update to v5.8-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/dma/jz4780-dma.txt')
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diff --git a/dts/Bindings/dma/jz4780-dma.txt b/dts/Bindings/dma/jz4780-dma.txt
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-* Ingenic XBurst DMA Controller
-
-Required properties:
-
-- compatible: Should be one of:
- * ingenic,jz4740-dma
- * ingenic,jz4725b-dma
- * ingenic,jz4770-dma
- * ingenic,jz4780-dma
- * ingenic,x1000-dma
- * ingenic,x1830-dma
-- reg: Should contain the DMA channel registers location and length, followed
- by the DMA controller registers location and length.
-- interrupts: Should contain the interrupt specifier of the DMA controller.
-- clocks: Should contain a clock specifier for the JZ4780/X1000/X1830 PDMA
- clock.
-- #dma-cells: Must be <2>. Number of integer cells in the dmas property of
- DMA clients (see below).
-
-Optional properties:
-
-- ingenic,reserved-channels: Bitmask of channels to reserve for devices that
- need a specific channel. These channels will only be assigned when explicitly
- requested by a client. The primary use for this is channels 0 and 1, which
- can be configured to have special behaviour for NAND/BCH when using
- programmable firmware.
-
-Example:
-
-dma: dma-controller@13420000 {
- compatible = "ingenic,jz4780-dma";
- reg = <0x13420000 0x400
- 0x13421000 0x40>;
-
- interrupt-parent = <&intc>;
- interrupts = <10>;
-
- clocks = <&cgu JZ4780_CLK_PDMA>;
-
- #dma-cells = <2>;
-
- ingenic,reserved-channels = <0x3>;
-};
-
-DMA clients must use the format described in dma.txt, giving a phandle to the
-DMA controller plus the following 2 integer cells:
-
-1. Request type: The DMA request type for transfers to/from the device on
- the allocated channel, as defined in the SoC documentation.
-
-2. Channel: If set to 0xffffffff, any available channel will be allocated for
- the client. Otherwise, the exact channel specified will be used. The channel
- should be reserved on the DMA controller using the ingenic,reserved-channels
- property.
-
-Example:
-
-uart0: serial@10030000 {
- ...
- dmas = <&dma 0x14 0xffffffff
- &dma 0x15 0xffffffff>;
- dma-names = "tx", "rx";
- ...
-};