* DMA40 DMA Controller Required properties: - compatible: "stericsson,dma40" - reg: Address range of the DMAC registers - reg-names: Names of the above areas to use during resource look-up - interrupt: Should contain the DMAC interrupt number - #dma-cells: must be <3> - memcpy-channels: Channels to be used for memcpy Optional properties: - dma-channels: Number of channels supported by hardware - if not present the driver will attempt to obtain the information from H/W - disabled-channels: Channels which can not be used Example: dma: dma-controller@801c0000 { compatible = "stericsson,db8500-dma40", "stericsson,dma40"; reg = <0x801C0000 0x1000 0x40010000 0x800>; reg-names = "base", "lcpa"; interrupt-parent = <&intc>; interrupts = <0 25 0x4>; #dma-cells = <2>; memcpy-channels = <56 57 58 59 60>; disabled-channels = <12>; dma-channels = <8>; }; Clients Required properties: - dmas: Comma separated list of dma channel requests - dma-names: Names of the aforementioned requested channels Each dmas request consists of 4 cells: 1. A phandle pointing to the DMA controller 2. Device signal number, the signal line for single and burst requests connected from the device to the DMA40 engine 3. The DMA request line number (only when 'use fixed channel' is set) 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: Endianness: Little endian when unset Big endian when set 0x00000008: Use fixed channel: Use automatic channel selection when unset Use DMA request line number when set 0x00000010: Set channel as high priority: Normal priority when unset High priority when set Existing signal numbers for the DB8500 ASIC. Unless specified, the signals are bidirectional, i.e. the same for RX and TX operations: 0: SPI controller 0 1: SD/MMC controller 0 (unused) 2: SD/MMC controller 1 (unused) 3: SD/MMC controller 2 (unused) 4: I2C port 1 5: I2C port 3 6: I2C port 2 7: I2C port 4 8: Synchronous Serial Port SSP0 9: Synchronous Serial Port SSP1 10: Multi-Channel Display Engine MCDE RX 11: UART port 2 12: UART port 1 13: UART port 0 14: Multirate Serial Port MSP2 15: I2C port 0 16: USB OTG in/out endpoints 7 & 15 17: USB OTG in/out endpoints 6 & 14 18: USB OTG in/out endpoints 5 & 13 19: USB OTG in/out endpoints 4 & 12 20: SLIMbus or HSI channel 0 21: SLIMbus or HSI channel 1 22: SLIMbus or HSI channel 2 23: SLIMbus or HSI channel 3 24: Multimedia DSP SXA0 25: Multimedia DSP SXA1 26: Multimedia DSP SXA2 27: Multimedia DSP SXA3 28: SD/MM controller 2 29: SD/MM controller 0 30: MSP port 1 on DB8500 v1, MSP port 3 on DB8500 v2 31: MSP port 0 or SLIMbus channel 0 32: SD/MM controller 1 33: SPI controller 2 34: i2c3 RX2 TX2 35: SPI controller 1 36: USB OTG in/out endpoints 3 & 11 37: USB OTG in/out endpoints 2 & 10 38: USB OTG in/out endpoints 1 & 9 39: USB OTG in/out endpoints 8 40: SPI controller 3 41: SD/MM controller 3 42: SD/MM controller 4 43: SD/MM controller 5 44: Multimedia DSP SXA4 45: Multimedia DSP SXA5 46: SLIMbus channel 8 or Multimedia DSP SXA6 47: SLIMbus channel 9 or Multimedia DSP SXA7 48: Crypto Accelerator 1 49: Crypto Accelerator 1 TX or Hash Accelerator 1 TX 50: Hash Accelerator 1 TX 51: memcpy TX (to be used by the DMA driver for memcpy operations) 52: SLIMbus or HSI channel 4 53: SLIMbus or HSI channel 5 54: SLIMbus or HSI channel 6 55: SLIMbus or HSI channel 7 56: memcpy (to be used by the DMA driver for memcpy operations) 57: memcpy (to be used by the DMA driver for memcpy operations) 58: memcpy (to be used by the DMA driver for memcpy operations) 59: memcpy (to be used by the DMA driver for memcpy operations) 60: memcpy (to be used by the DMA driver for memcpy operations) 61: Crypto Accelerator 0 62: Crypto Accelerator 0 TX or Hash Accelerator 0 TX 63: Hash Accelerator 0 TX Example: uart@80120000 { compatible = "arm,pl011", "arm,primecell"; reg = <0x80120000 0x1000>; interrupts = <0 11 0x4>; dmas = <&dma 13 0 0x2>, /* Logical - DevToMem */ <&dma 13 0 0x0>; /* Logical - MemToDev */ dma-names = "rx", "rx"; };