Commit 3f1c6ebf authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Linus Torvalds
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powerpc: add mmc-spi-slot bindings 



The bindings describes a case where MMC/SD/SDIO slot directly connected to
a SPI bus.  Such setups are widely used on embedded PowerPC boards.

The patch also adds the mmc-spi-slot entry to the OpenFirmware modalias
table.

Signed-off-by: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 35b4b3c0

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

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MMC/SD/SDIO slot directly connected to a SPI bus



Required properties:

- compatible : should be "mmc-spi-slot".

- reg : should specify SPI address (chip-select number).

- spi-max-frequency : maximum frequency for this device (Hz).

- voltage-ranges : two cells are required, first cell specifies minimum

  slot voltage (mV), second cell specifies maximum slot voltage (mV).

  Several ranges could be specified.

- gpios : (optional) may specify GPIOs in this order: Card-Detect GPIO,

  Write-Protect GPIO.



Example:



	mmc-slot@0 {

		compatible = "fsl,mpc8323rdb-mmc-slot",

			     "mmc-spi-slot";

		reg = <0>;

		gpios = <&qe_pio_d 14 1

			 &qe_pio_d 15 0>;

		voltage-ranges = <3300 3300>;

		spi-max-frequency = <50000000>;

	};

drivers/of/base.c

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Original line number Diff line number Diff line
@@ -446,6 +446,7 @@ struct of_modalias_table { 
};

static struct of_modalias_table of_modalias_table[] = {

	{ "fsl,mcu-mpc8349emitx", "mcu-mpc8349emitx" },

	{ "mmc-spi-slot", "mmc_spi" },

};



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