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Documentation / devicetree / bindings / mmc / mmc-spi-slot.txt




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Based on kernel version 3.9. Page generated on 2013-05-02 22:59 EST.

1	MMC/SD/SDIO slot directly connected to a SPI bus
2	
3	This file documents differences between the core properties described
4	by mmc.txt and the properties used by the mmc_spi driver.
5	
6	Required 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	
12	Optional 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	
19	Example:
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		};
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