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- interrupt-parent : the phandle for the interrupt controller that
17  services interrupts for this device.
18
19Example:
20
21	mmc-slot@0 {
22		compatible = "fsl,mpc8323rdb-mmc-slot",
23			     "mmc-spi-slot";
24		reg = <0>;
25		gpios = <&qe_pio_d 14 1
26			 &qe_pio_d 15 0>;
27		voltage-ranges = <3300 3300>;
28		spi-max-frequency = <50000000>;
29		interrupts = <42>;
30		interrupt-parent = <&PIC>;
31	};
32