renesas,mmcif.txt

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    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: should be "renesas,mmcif-<soctype>", "renesas,sh-mmcif" as a
   10   fallback. Examples with <soctype> are:
   11         - "renesas,mmcif-r7s72100" for the MMCIF found in r7s72100 SoCs
   12         - "renesas,mmcif-r8a73a4" for the MMCIF found in r8a73a4 SoCs
   13         - "renesas,mmcif-r8a7740" for the MMCIF found in r8a7740 SoCs
   14         - "renesas,mmcif-r8a7742" for the MMCIF found in r8a7742 SoCs
   15         - "renesas,mmcif-r8a7743" for the MMCIF found in r8a7743 SoCs
   16         - "renesas,mmcif-r8a7744" for the MMCIF found in r8a7744 SoCs
   17         - "renesas,mmcif-r8a7745" for the MMCIF found in r8a7745 SoCs
   18         - "renesas,mmcif-r8a7778" for the MMCIF found in r8a7778 SoCs
   19         - "renesas,mmcif-r8a7790" for the MMCIF found in r8a7790 SoCs
   20         - "renesas,mmcif-r8a7791" for the MMCIF found in r8a7791 SoCs
   21         - "renesas,mmcif-r8a7793" for the MMCIF found in r8a7793 SoCs
   22         - "renesas,mmcif-r8a7794" for the MMCIF found in r8a7794 SoCs
   23         - "renesas,mmcif-sh73a0" for the MMCIF found in sh73a0 SoCs
   24 
   25 - interrupts: Some SoCs have only 1 shared interrupt, while others have either
   26   2 or 3 individual interrupts (error, int, card detect). Below is the number
   27   of interrupts for each SoC:
   28     1: r8a73a4, r8a7742, r8a7743, r8a7744, r8a7745, r8a7778, r8a7790, r8a7791,
   29        r8a7793, r8a7794
   30     2: r8a7740, sh73a0
   31     3: r7s72100
   32 
   33 - clocks: reference to the functional clock
   34 
   35 - dmas: reference to the DMA channels, one per channel name listed in the
   36   dma-names property.
   37 - dma-names: must contain "tx" for the transmit DMA channel and "rx" for the
   38   receive DMA channel.
   39 - max-frequency: Maximum operating clock frequency, driver uses default clock
   40   frequency if it is not set.
   41 
   42 
   43 Example: R8A7790 (R-Car H2) MMCIF0
   44 
   45         mmcif0: mmc@ee200000 {
   46                 compatible = "renesas,mmcif-r8a7790", "renesas,sh-mmcif";
   47                 reg = <0 0xee200000 0 0x80>;
   48                 interrupts = <0 169 IRQ_TYPE_LEVEL_HIGH>;
   49                 clocks = <&mstp3_clks R8A7790_CLK_MMCIF0>;
   50                 dmas = <&dmac0 0xd1>, <&dmac0 0xd2>;
   51                 dma-names = "tx", "rx";
   52                 max-frequency = <97500000>;
   53         };

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