| 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 | |
| Chris Ball | abe1e05 | 2012-08-22 13:21:01 -0400 | [diff] [blame] | 12 | Card detection: |
| 13 | If no property below is supplied, standard SDHCI card detect is used. |
| 14 | Only one of the properties in this section should be supplied: |
| 15 | - broken-cd: There is no card detection available; polling must be used. |
| 16 | - cd-gpios: Specify GPIOs for card detection, see gpio binding |
| 17 | - non-removable: non-removable slot (like eMMC); assume always present. |
| 18 | |
| Arnd Bergmann | 7f21779 | 2012-05-13 00:14:24 -0400 | [diff] [blame] | 19 | Optional properties: |
| Chris Ball | ed3efc1 | 2012-06-11 22:06:43 -0400 | [diff] [blame] | 20 | - wp-gpios: Specify GPIOs for write protection, see gpio binding |
| 21 | - cd-inverted: when present, polarity on the cd gpio line is inverted |
| Arnd Bergmann | 7f21779 | 2012-05-13 00:14:24 -0400 | [diff] [blame] | 22 | - wp-inverted: when present, polarity on the wp gpio line is inverted |
| Arnd Bergmann | 7f21779 | 2012-05-13 00:14:24 -0400 | [diff] [blame] | 23 | - max-frequency: maximum operating clock frequency |
| 24 | |
| Abhilash Kesavan | e5d0e9c | 2012-11-19 10:26:19 +0530 | [diff] [blame^] | 25 | Optional SDIO properties: |
| 26 | - keep-power-in-suspend: Preserves card power during a suspend/resume cycle |
| 27 | - enable-sdio-wakeup: Enables wake up of host system on SDIO IRQ assertion |
| 28 | |
| Arnd Bergmann | 7f21779 | 2012-05-13 00:14:24 -0400 | [diff] [blame] | 29 | Example: |
| 30 | |
| 31 | sdhci@ab000000 { |
| 32 | compatible = "sdhci"; |
| 33 | reg = <0xab000000 0x200>; |
| 34 | interrupts = <23>; |
| 35 | bus-width = <4>; |
| 36 | cd-gpios = <&gpio 69 0>; |
| 37 | cd-inverted; |
| 38 | wp-gpios = <&gpio 70 0>; |
| 39 | max-frequency = <50000000>; |
| Abhilash Kesavan | e5d0e9c | 2012-11-19 10:26:19 +0530 | [diff] [blame^] | 40 | keep-power-in-suspend; |
| 41 | enable-sdio-wakeup; |
| Arnd Bergmann | 7f21779 | 2012-05-13 00:14:24 -0400 | [diff] [blame] | 42 | } |