diff options
Diffstat (limited to 'Documentation/devicetree/bindings/dma')
6 files changed, 92 insertions, 32 deletions
diff --git a/Documentation/devicetree/bindings/dma/atmel-dma.txt b/Documentation/devicetree/bindings/dma/atmel-dma.txt index c280a0e..e1f343c 100644 --- a/Documentation/devicetree/bindings/dma/atmel-dma.txt +++ b/Documentation/devicetree/bindings/dma/atmel-dma.txt @@ -18,14 +18,14 @@ dma0: dma@ffffec00 { DMA clients connected to the Atmel DMA controller must use the format described in the dma.txt file, using a three-cell specifier for each channel: -a phandle plus two interger cells. +a phandle plus two integer cells. The three cells in order are: 1. A phandle pointing to the DMA controller. 2. The memory interface (16 most significant bits), the peripheral interface (16 less significant bits). 3. Parameters for the at91 DMA configuration register which are device -dependant: +dependent: - bit 7-0: peripheral identifier for the hardware handshaking interface. The identifier can be different for tx and rx. - bit 11-8: FIFO configuration. 0 for half FIFO, 1 for ALAP, 1 for ASAP. diff --git a/Documentation/devicetree/bindings/dma/fsl-imx-dma.txt b/Documentation/devicetree/bindings/dma/fsl-imx-dma.txt index 2717ecb..7bd8847 100644 --- a/Documentation/devicetree/bindings/dma/fsl-imx-dma.txt +++ b/Documentation/devicetree/bindings/dma/fsl-imx-dma.txt @@ -34,7 +34,7 @@ Clients have to specify the DMA requests with phandles in a list. Required properties: - dmas: List of one or more DMA request specifiers. One DMA request specifier consists of a phandle to the DMA controller followed by the integer - specifiying the request line. + specifying the request line. - dma-names: List of string identifiers for the DMA requests. For the correct names, have a look at the specific client driver. diff --git a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt index 68cee4f5..4fa814d 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 0000000..23f8d71 --- /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"; + }; + diff --git a/Documentation/devicetree/bindings/dma/shdma.txt b/Documentation/devicetree/bindings/dma/shdma.txt index c15994a..2a3f3b8 100644 --- a/Documentation/devicetree/bindings/dma/shdma.txt +++ b/Documentation/devicetree/bindings/dma/shdma.txt @@ -22,42 +22,51 @@ Optional properties (currently unused): * DMA controller Required properties: -- compatible: should be "renesas,shdma" +- compatible: should be of the form "renesas,shdma-<soc>", where <soc> should + be replaced with the desired SoC model, e.g. + "renesas,shdma-r8a73a4" for the system DMAC on r8a73a4 SoC Example: - dmac: dma-mux0 { + dmac: dma-multiplexer@0 { compatible = "renesas,shdma-mux"; #dma-cells = <1>; - dma-channels = <6>; + dma-channels = <20>; dma-requests = <256>; - reg = <0 0>; /* Needed for AUXDATA */ - #address-cells = <1>; - #size-cells = <1>; + #address-cells = <2>; + #size-cells = <2>; ranges; - dma0: shdma@fe008020 { - compatible = "renesas,shdma"; - reg = <0xfe008020 0x270>, - <0xfe009000 0xc>; + dma0: dma-controller@e6700020 { + compatible = "renesas,shdma-r8a73a4"; + reg = <0 0xe6700020 0 0x89e0>; interrupt-parent = <&gic>; - interrupts = <0 34 4 - 0 28 4 - 0 29 4 - 0 30 4 - 0 31 4 - 0 32 4 - 0 33 4>; + interrupts = <0 220 4 + 0 200 4 + 0 201 4 + 0 202 4 + 0 203 4 + 0 204 4 + 0 205 4 + 0 206 4 + 0 207 4 + 0 208 4 + 0 209 4 + 0 210 4 + 0 211 4 + 0 212 4 + 0 213 4 + 0 214 4 + 0 215 4 + 0 216 4 + 0 217 4 + 0 218 4 + 0 219 4>; interrupt-names = "error", "ch0", "ch1", "ch2", "ch3", - "ch4", "ch5"; - }; - - dma1: shdma@fe018020 { - ... - }; - - dma2: shdma@fe028020 { - ... + "ch4", "ch5", "ch6", "ch7", + "ch8", "ch9", "ch10", "ch11", + "ch12", "ch13", "ch14", "ch15", + "ch16", "ch17", "ch18", "ch19"; }; }; diff --git a/Documentation/devicetree/bindings/dma/ste-dma40.txt b/Documentation/devicetree/bindings/dma/ste-dma40.txt index bea5b73..a8c21c2 100644 --- a/Documentation/devicetree/bindings/dma/ste-dma40.txt +++ b/Documentation/devicetree/bindings/dma/ste-dma40.txt @@ -37,14 +37,14 @@ Each dmas request consists of 4 cells: 1. A phandle pointing to the DMA controller 2. Device Type 3. The DMA request line number (only when 'use fixed channel' is set) - 4. A 32bit mask specifying; mode, direction and endianess [NB: This list will grow] + 4. A 32bit mask specifying; mode, direction and endianness [NB: This list will grow] 0x00000001: Mode: Logical channel when unset Physical channel when set 0x00000002: Direction: Memory to Device when unset Device to Memory when set - 0x00000004: Endianess: + 0x00000004: Endianness: Little endian when unset Big endian when set 0x00000008: Use fixed channel: |
