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* 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-<soctype>", "renesas,sh-mmcif" as a
fallback. Examples with <soctype> 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-r8a7744" for the MMCIF found in r8a7744 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, r8a7744, 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>;
};
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