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3f1c6ebf57
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: Anton 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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
24 lines
725 B
Plaintext
24 lines
725 B
Plaintext
MMC/SD/SDIO slot directly connected to a SPI bus
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Required properties:
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- compatible : should be "mmc-spi-slot".
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- reg : should specify SPI address (chip-select number).
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- spi-max-frequency : maximum frequency for this device (Hz).
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- voltage-ranges : two cells are required, first cell specifies minimum
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slot voltage (mV), second cell specifies maximum slot voltage (mV).
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Several ranges could be specified.
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- gpios : (optional) may specify GPIOs in this order: Card-Detect GPIO,
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Write-Protect GPIO.
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Example:
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mmc-slot@0 {
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compatible = "fsl,mpc8323rdb-mmc-slot",
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"mmc-spi-slot";
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reg = <0>;
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gpios = <&qe_pio_d 14 1
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&qe_pio_d 15 0>;
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voltage-ranges = <3300 3300>;
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spi-max-frequency = <50000000>;
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};
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