51 lines
2 KiB
Plaintext
51 lines
2 KiB
Plaintext
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* Renesas Multi Media Card Interface (MMCIF) Controller
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This file documents differences between the core properties in mmc.txt
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and the properties used by the MMCIF device.
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Required properties:
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- compatible: should be "renesas,mmcif-<soctype>", "renesas,sh-mmcif" as a
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fallback. Examples with <soctype> are:
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- "renesas,mmcif-r7s72100" for the MMCIF found in r7s72100 SoCs
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- "renesas,mmcif-r8a73a4" for the MMCIF found in r8a73a4 SoCs
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- "renesas,mmcif-r8a7740" for the MMCIF found in r8a7740 SoCs
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- "renesas,mmcif-r8a7743" for the MMCIF found in r8a7743 SoCs
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- "renesas,mmcif-r8a7745" for the MMCIF found in r8a7745 SoCs
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- "renesas,mmcif-r8a7778" for the MMCIF found in r8a7778 SoCs
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- "renesas,mmcif-r8a7790" for the MMCIF found in r8a7790 SoCs
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- "renesas,mmcif-r8a7791" for the MMCIF found in r8a7791 SoCs
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- "renesas,mmcif-r8a7793" for the MMCIF found in r8a7793 SoCs
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- "renesas,mmcif-r8a7794" for the MMCIF found in r8a7794 SoCs
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- "renesas,mmcif-sh73a0" for the MMCIF found in sh73a0 SoCs
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- interrupts: Some SoCs have only 1 shared interrupt, while others have either
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2 or 3 individual interrupts (error, int, card detect). Below is the number
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of interrupts for each SoC:
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1: r8a73a4, r8a7743, r8a7745, r8a7778, r8a7790, r8a7791, r8a7793, r8a7794
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2: r8a7740, sh73a0
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3: r7s72100
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- clocks: reference to the functional clock
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- dmas: reference to the DMA channels, one per channel name listed in the
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dma-names property.
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- dma-names: must contain "tx" for the transmit DMA channel and "rx" for the
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receive DMA channel.
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- max-frequency: Maximum operating clock frequency, driver uses default clock
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frequency if it is not set.
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Example: R8A7790 (R-Car H2) MMCIF0
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mmcif0: mmc@ee200000 {
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compatible = "renesas,mmcif-r8a7790", "renesas,sh-mmcif";
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reg = <0 0xee200000 0 0x80>;
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interrupts = <0 169 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&mstp3_clks R8A7790_CLK_MMCIF0>;
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dmas = <&dmac0 0xd1>, <&dmac0 0xd2>;
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dma-names = "tx", "rx";
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max-frequency = <97500000>;
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};
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