| Arnd Bergmann | 7f21779 | 2012-05-13 00:14:24 -0400 | [diff] [blame] | 1 | These properties are common to multiple MMC host controllers. Any host |
| 2 | that requires the respective functionality should implement them using |
| 3 | these definitions. |
| 4 | |
| Chris Ball | ed3efc1 | 2012-06-11 22:06:43 -0400 | [diff] [blame] | 5 | Interpreted by the OF core: |
| 6 | - reg: Registers location and length. |
| 7 | - interrupts: Interrupts used by the MMC controller. |
| 8 | |
| Arnd Bergmann | 7f21779 | 2012-05-13 00:14:24 -0400 | [diff] [blame] | 9 | Required properties: |
| 10 | - bus-width: Number of data lines, can be <1>, <4>, or <8> |
| 11 | |
| 12 | Optional properties: |
| Chris Ball | ed3efc1 | 2012-06-11 22:06:43 -0400 | [diff] [blame] | 13 | - cd-gpios: Specify GPIOs for card detection, see gpio binding |
| 14 | - wp-gpios: Specify GPIOs for write protection, see gpio binding |
| 15 | - cd-inverted: when present, polarity on the cd gpio line is inverted |
| Arnd Bergmann | 7f21779 | 2012-05-13 00:14:24 -0400 | [diff] [blame] | 16 | - wp-inverted: when present, polarity on the wp gpio line is inverted |
| 17 | - non-removable: non-removable slot (like eMMC) |
| 18 | - max-frequency: maximum operating clock frequency |
| 19 | |
| 20 | Example: |
| 21 | |
| 22 | sdhci@ab000000 { |
| 23 | compatible = "sdhci"; |
| 24 | reg = <0xab000000 0x200>; |
| 25 | interrupts = <23>; |
| 26 | bus-width = <4>; |
| 27 | cd-gpios = <&gpio 69 0>; |
| 28 | cd-inverted; |
| 29 | wp-gpios = <&gpio 70 0>; |
| 30 | max-frequency = <50000000>; |
| 31 | } |