1These properties are common to multiple MMC host controllers. Any host 2that requires the respective functionality should implement them using 3these definitions. 4 5Interpreted by the OF core: 6- reg: Registers location and length. 7- interrupts: Interrupts used by the MMC controller. 8 9Required properties: 10- bus-width: Number of data lines, can be <1>, <4>, or <8> 11 12Card detection: 13If no property below is supplied, standard SDHCI card detect is used. 14Only 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 19Optional properties: 20- wp-gpios: Specify GPIOs for write protection, see gpio binding 21- cd-inverted: when present, polarity on the cd gpio line is inverted 22- wp-inverted: when present, polarity on the wp gpio line is inverted 23- max-frequency: maximum operating clock frequency 24- no-1-8-v: when present, denotes that 1.8v card voltage is not supported on 25 this system, even if the controller claims it is. 26 27Optional SDIO properties: 28- keep-power-in-suspend: Preserves card power during a suspend/resume cycle 29- enable-sdio-wakeup: Enables wake up of host system on SDIO IRQ assertion 30 31Example: 32 33sdhci@ab000000 { 34 compatible = "sdhci"; 35 reg = <0xab000000 0x200>; 36 interrupts = <23>; 37 bus-width = <4>; 38 cd-gpios = <&gpio 69 0>; 39 cd-inverted; 40 wp-gpios = <&gpio 70 0>; 41 max-frequency = <50000000>; 42 keep-power-in-suspend; 43 enable-sdio-wakeup; 44} 45