Documentation/devicetree/bindings/mmc/renesas,mmcif.txt

   1 * Renesas Multi Media Card Interface (MMCIF) Controller
   2
   3 This file documents differences between the core properties in mmc.txt
   4 and the properties used by the MMCIF device.
   5
   6
   7 Required properties:
   8
   9 - compatible: must contain one of the following
  10         - "renesas,mmcif-r8a7740" for the MMCIF found in r8a7740 SoCs
  11         - "renesas,mmcif-r8a7790" for the MMCIF found in r8a7790 SoCs
  12         - "renesas,mmcif-r8a7791" for the MMCIF found in r8a7791 SoCs
  13         - "renesas,sh-mmcif" for the generic MMCIF
  14
  15 - clocks: reference to the functional clock
  16
  17 - dmas: reference to the DMA channels, one per channel name listed in the
  18   dma-names property.
  19 - dma-names: must contain "tx" for the transmit DMA channel and "rx" for the
  20   receive DMA channel.
  21 - max-frequency: Maximum operating clock frequency, driver uses default clock
  22   frequency if it is not set.
  23
  24
  25 Example: R8A7790 (R-Car H2) MMCIF0
  26
  27         mmcif0: mmc@ee200000 {
  28                 compatible = "renesas,mmcif-r8a7790", "renesas,sh-mmcif";
  29                 reg = <0 0xee200000 0 0x80>;
  30                 interrupts = <0 169 IRQ_TYPE_LEVEL_HIGH>;
  31                 clocks = <&mstp3_clks R8A7790_CLK_MMCIF0>;
  32                 dmas = <&dmac0 0xd1>, <&dmac0 0xd2>;
  33                 dma-names = "tx", "rx";
  34                 max-frequency = <97500000>;
  35         };