1MMC/SD/SDIO slot directly connected to a SPI bus 2 3This file documents differences between the core properties described 4by mmc.txt and the properties used by the mmc_spi driver. 5 6Required properties: 7- spi-max-frequency : maximum frequency for this device (Hz). 8- voltage-ranges : two cells are required, first cell specifies minimum 9 slot voltage (mV), second cell specifies maximum slot voltage (mV). 10 Several ranges could be specified. 11 12Optional properties: 13- gpios : may specify GPIOs in this order: Card-Detect GPIO, 14 Write-Protect GPIO. Note that this does not follow the 15 binding from mmc.txt, for historical reasons. 16 17Example: 18 19 mmc-slot@0 { 20 compatible = "fsl,mpc8323rdb-mmc-slot", 21 "mmc-spi-slot"; 22 reg = <0>; 23 gpios = <&qe_pio_d 14 1 24 &qe_pio_d 15 0>; 25 voltage-ranges = <3300 3300>; 26 spi-max-frequency = <50000000>; 27 interrupts = <42>; 28 interrupt-parent = <&PIC>; 29 }; 30