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53 lines
2.1 KiB
53 lines
2.1 KiB
* 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-r8a7742" for the MMCIF found in r8a7742 SoCs |
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- "renesas,mmcif-r8a7743" for the MMCIF found in r8a7743 SoCs |
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- "renesas,mmcif-r8a7744" for the MMCIF found in r8a7744 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, r8a7742, r8a7743, r8a7744, r8a7745, r8a7778, r8a7790, r8a7791, |
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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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