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/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt

https://bitbucket.org/sammyz/iscream_thunderc-2.6.35-rebase
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Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1MMC/SD/SDIO slot directly connected to a SPI bus
 2
 3Required properties:
 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.
10- gpios : (optional) may specify GPIOs in this order: Card-Detect GPIO,
11  Write-Protect GPIO.
12
13Example:
14
15	mmc-slot@0 {
16		compatible = "fsl,mpc8323rdb-mmc-slot",
17			     "mmc-spi-slot";
18		reg = <0>;
19		gpios = <&qe_pio_d 14 1
20			 &qe_pio_d 15 0>;
21		voltage-ranges = <3300 3300>;
22		spi-max-frequency = <50000000>;
23	};