| These properties are common to multiple MMC host controllers. Any host |
| that requires the respective functionality should implement them using |
| these definitions. |
| |
| Interpreted by the OF core: |
| - reg: Registers location and length. |
| - interrupts: Interrupts used by the MMC controller. |
| |
| Required properties: |
| - bus-width: Number of data lines, can be <1>, <4>, or <8> |
| |
| Optional properties: |
| - cd-gpios: Specify GPIOs for card detection, see gpio binding |
| - wp-gpios: Specify GPIOs for write protection, see gpio binding |
| - cd-inverted: when present, polarity on the cd gpio line is inverted |
| - wp-inverted: when present, polarity on the wp gpio line is inverted |
| - non-removable: non-removable slot (like eMMC) |
| - max-frequency: maximum operating clock frequency |
| |
| Example: |
| |
| sdhci@ab000000 { |
| compatible = "sdhci"; |
| reg = <0xab000000 0x200>; |
| interrupts = <23>; |
| bus-width = <4>; |
| cd-gpios = <&gpio 69 0>; |
| cd-inverted; |
| wp-gpios = <&gpio 70 0>; |
| max-frequency = <50000000>; |
| } |
