From f30fb03d4d3abe2da86918a92df0964cdf933e82 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Mon, 25 Feb 2013 21:56:56 +0800 Subject: ARM: dts: add generic DMA device tree binding for mxs-dma Add generic DMA device tree binding for mxs-dma. The changes include: * Add channel interrupts into DMA controller nodes * Add properties '#dma-cells' and 'dma-channels' for DMA controller nodes * And properties 'dmas' and 'dma-names' for DMA client nodes * Update mxs-dma device tree binding doc Signed-off-by: Shawn Guo Reviewed-by: Arnd Bergmann --- .../devicetree/bindings/dma/fsl-mxs-dma.txt | 49 ++++++++++++++++++++-- 1 file changed, 45 insertions(+), 4 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt b/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt index ded0398d3bdc..a4873e5e3e36 100644 --- a/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt +++ b/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt @@ -3,17 +3,58 @@ Required properties: - compatible : Should be "fsl,-dma-apbh" or "fsl,-dma-apbx" - reg : Should contain registers location and length +- interrupts : Should contain the interrupt numbers of DMA channels. + If a channel is empty/reserved, 0 should be filled in place. +- #dma-cells : Must be <1>. The number cell specifies the channel ID. +- dma-channels : Number of channels supported by the DMA controller + +Optional properties: +- interrupt-names : Name of DMA channel interrupts Supported chips: imx23, imx28. Examples: -dma-apbh@80004000 { + +dma_apbh: dma-apbh@80004000 { compatible = "fsl,imx28-dma-apbh"; - reg = <0x80004000 2000>; + reg = <0x80004000 0x2000>; + interrupts = <82 83 84 85 + 88 88 88 88 + 88 88 88 88 + 87 86 0 0>; + interrupt-names = "ssp0", "ssp1", "ssp2", "ssp3", + "gpmi0", "gmpi1", "gpmi2", "gmpi3", + "gpmi4", "gmpi5", "gpmi6", "gmpi7", + "hsadc", "lcdif", "empty", "empty"; + #dma-cells = <1>; + dma-channels = <16>; }; -dma-apbx@80024000 { +dma_apbx: dma-apbx@80024000 { compatible = "fsl,imx28-dma-apbx"; - reg = <0x80024000 2000>; + reg = <0x80024000 0x2000>; + interrupts = <78 79 66 0 + 80 81 68 69 + 70 71 72 73 + 74 75 76 77>; + interrupt-names = "auart4-rx", "aurat4-tx", "spdif-tx", "empty", + "saif0", "saif1", "i2c0", "i2c1", + "auart0-rx", "auart0-tx", "auart1-rx", "auart1-tx", + "auart2-rx", "auart2-tx", "auart3-rx", "auart3-tx"; + #dma-cells = <1>; + dma-channels = <16>; +}; + +DMA clients connected to the MXS DMA controller must use the format +described in the dma.txt file. + +Examples: + +auart0: serial@8006a000 { + compatible = "fsl,imx28-auart", "fsl,imx23-auart"; + reg = <0x8006a000 0x2000>; + interrupts = <112>; + dmas = <&dma_apbx 8>, <&dma_apbx 9>; + dma-names = "rx", "tx"; }; -- cgit v1.2.3