| * 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-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>; |
| }; |
