diff options
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt | 7 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/dma/k3dma.txt | 46 |
2 files changed, 52 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt index 68cee4f5539f..4fa814d38321 100644 --- a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt +++ b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt @@ -1,7 +1,12 @@ * Freescale Smart Direct Memory Access (SDMA) Controller for i.MX Required properties: -- compatible : Should be "fsl,<chip>-sdma" +- compatible : Should be "fsl,imx31-sdma", "fsl,imx31-to1-sdma", + "fsl,imx31-to2-sdma", "fsl,imx35-sdma", "fsl,imx35-to1-sdma", + "fsl,imx35-to2-sdma", "fsl,imx51-sdma", "fsl,imx53-sdma" or + "fsl,imx6q-sdma". The -to variants should be preferred since they + allow to determnine the correct ROM script addresses needed for + the driver to work without additional firmware. - reg : Should contain SDMA registers location and length - interrupts : Should contain SDMA interrupt - #dma-cells : Must be <3>. diff --git a/Documentation/devicetree/bindings/dma/k3dma.txt b/Documentation/devicetree/bindings/dma/k3dma.txt new file mode 100644 index 000000000000..23f8d712c3ce --- /dev/null +++ b/Documentation/devicetree/bindings/dma/k3dma.txt @@ -0,0 +1,46 @@ +* Hisilicon K3 DMA controller + +See dma.txt first + +Required properties: +- compatible: Should be "hisilicon,k3-dma-1.0" +- reg: Should contain DMA registers location and length. +- interrupts: Should contain one interrupt shared by all channel +- #dma-cells: see dma.txt, should be 1, para number +- dma-channels: physical channels supported +- dma-requests: virtual channels supported, each virtual channel + have specific request line +- clocks: clock required + +Example: + +Controller: + dma0: dma@fcd02000 { + compatible = "hisilicon,k3-dma-1.0"; + reg = <0xfcd02000 0x1000>; + #dma-cells = <1>; + dma-channels = <16>; + dma-requests = <27>; + interrupts = <0 12 4>; + clocks = <&pclk>; + status = "disable"; + }; + +Client: +Use specific request line passing from dmax +For example, i2c0 read channel request line is 18, while write channel use 19 + + i2c0: i2c@fcb08000 { + compatible = "snps,designware-i2c"; + dmas = <&dma0 18 /* read channel */ + &dma0 19>; /* write channel */ + dma-names = "rx", "tx"; + }; + + i2c1: i2c@fcb09000 { + compatible = "snps,designware-i2c"; + dmas = <&dma0 20 /* read channel */ + &dma0 21>; /* write channel */ + dma-names = "rx", "tx"; + }; + |