0001 NXP Layerscape SoC qDMA Controller
0002 ==================================
0003
0004 This device follows the generic DMA bindings defined in dma/dma.txt.
0005
0006 Required properties:
0007
0008 - compatible: Must be one of
0009 "fsl,ls1021a-qdma": for LS1021A Board
0010 "fsl,ls1028a-qdma": for LS1028A Board
0011 "fsl,ls1043a-qdma": for ls1043A Board
0012 "fsl,ls1046a-qdma": for ls1046A Board
0013 - reg: Should contain the register's base address and length.
0014 - interrupts: Should contain a reference to the interrupt used by this
0015 device.
0016 - interrupt-names: Should contain interrupt names:
0017 "qdma-queue0": the block0 interrupt
0018 "qdma-queue1": the block1 interrupt
0019 "qdma-queue2": the block2 interrupt
0020 "qdma-queue3": the block3 interrupt
0021 "qdma-error": the error interrupt
0022 - fsl,dma-queues: Should contain number of queues supported.
0023 - dma-channels: Number of DMA channels supported
0024 - block-number: the virtual block number
0025 - block-offset: the offset of different virtual block
0026 - status-sizes: status queue size of per virtual block
0027 - queue-sizes: command queue size of per virtual block, the size number
0028 based on queues
0029
0030 Optional properties:
0031
0032 - dma-channels: Number of DMA channels supported by the controller.
0033 - big-endian: If present registers and hardware scatter/gather descriptors
0034 of the qDMA are implemented in big endian mode, otherwise in little
0035 mode.
0036
0037 Examples:
0038
0039 qdma: dma-controller@8390000 {
0040 compatible = "fsl,ls1021a-qdma";
0041 reg = <0x0 0x8388000 0x0 0x1000>, /* Controller regs */
0042 <0x0 0x8389000 0x0 0x1000>, /* Status regs */
0043 <0x0 0x838a000 0x0 0x2000>; /* Block regs */
0044 interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>,
0045 <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,
0046 <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
0047 interrupt-names = "qdma-error",
0048 "qdma-queue0", "qdma-queue1";
0049 dma-channels = <8>;
0050 block-number = <2>;
0051 block-offset = <0x1000>;
0052 fsl,dma-queues = <2>;
0053 status-sizes = <64>;
0054 queue-sizes = <64 64>;
0055 big-endian;
0056 };
0057
0058 DMA clients must use the format described in dma/dma.txt file.
