1 MMC/SD/SDIO slot directly connected to a SPI bus
4 - compatible : should be "mmc-spi-slot".
5 - reg : should specify SPI address (chip-select number).
6 - spi-max-frequency : maximum frequency for this device (Hz).
7 - voltage-ranges : two cells are required, first cell specifies minimum
8 slot voltage (mV), second cell specifies maximum slot voltage (mV).
9 Several ranges could be specified.
12 - gpios : may specify GPIOs in this order: Card-Detect GPIO,
13 Write-Protect GPIO. Note that this does not follow the
14 binding from mmc.txt, for historic reasons.
15 - interrupts : the interrupt of a card detect interrupt.
16 - interrupt-parent : the phandle for the interrupt controller that
17 services interrupts for this device.
22 compatible = "fsl,mpc8323rdb-mmc-slot",
25 gpios = <&qe_pio_d 14 1
27 voltage-ranges = <3300 3300>;
28 spi-max-frequency = <50000000>;
30 interrupt-parent = <&PIC>;