Kernel-4.18.0-80.el8_renesas,mmcif

• Renesas Multi Media Card Interface (MMCIF) Controller

This file documents differences between the core properties in mmc.txt
and the properties used by the MMCIF device.

Required properties:

• compatible: should be “renesas,mmcif-“, “renesas,sh-mmcif” as a
  fallback. Examples with are:

  • “renesas,mmcif-r7s72100” for the MMCIF found in r7s72100 SoCs
  • “renesas,mmcif-r8a73a4” for the MMCIF found in r8a73a4 SoCs
  • “renesas,mmcif-r8a7740” for the MMCIF found in r8a7740 SoCs
  • “renesas,mmcif-r8a7743” for the MMCIF found in r8a7743 SoCs
  • “renesas,mmcif-r8a7745” for the MMCIF found in r8a7745 SoCs
  • “renesas,mmcif-r8a7778” for the MMCIF found in r8a7778 SoCs
  • “renesas,mmcif-r8a7790” for the MMCIF found in r8a7790 SoCs
  • “renesas,mmcif-r8a7791” for the MMCIF found in r8a7791 SoCs
  • “renesas,mmcif-r8a7793” for the MMCIF found in r8a7793 SoCs
  • “renesas,mmcif-r8a7794” for the MMCIF found in r8a7794 SoCs
  • “renesas,mmcif-sh73a0” for the MMCIF found in sh73a0 SoCs

• interrupts: Some SoCs have only 1 shared interrupt, while others have either
  2 or 3 individual interrupts (error, int, card detect). Below is the number
  of interrupts for each SoC:
  1: r8a73a4, r8a7743, r8a7745, r8a7778, r8a7790, r8a7791, r8a7793, r8a7794
  2: r8a7740, sh73a0
  3: r7s72100

• clocks: reference to the functional clock

• dmas: reference to the DMA channels, one per channel name listed in the
  dma-names property.

• dma-names: must contain “tx” for the transmit DMA channel and “rx” for the
  receive DMA channel.

• max-frequency: Maximum operating clock frequency, driver uses default clock
  frequency if it is not set.

Example: R8A7790 (R-Car H2) MMCIF0

mmcif0: mmc@ee200000 {
    compatible = "renesas,mmcif-r8a7790", "renesas,sh-mmcif";
    reg = <0 0xee200000 0 0x80>;
    interrupts = <0 169 IRQ_TYPE_LEVEL_HIGH>;
    clocks = <&mstp3_clks R8A7790_CLK_MMCIF0>;
    dmas = <&dmac0 0xd1>, <&dmac0 0xd2>;
    dma-names = "tx", "rx";
    max-frequency = <97500000>;
};