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0e91e434c8
With the generic DMA device tree helper supported by mxs-dma driver, client devices only need to call dma_request_slave_channel() for requesting a DMA channel from dmaengine. Since mxs is a DT only platform now, along with the changes, the non-DT case checking in probe function also gets cleaned up. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: Chris Ball <cjb@laptop.org> Cc: linux-mmc@vger.kernel.org Reviewed-by: Arnd Bergmann <arnd@arndb.de>
28 lines
797 B
Plaintext
28 lines
797 B
Plaintext
* Freescale MXS MMC controller
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The Freescale MXS Synchronous Serial Ports (SSP) can act as a MMC controller
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to support MMC, SD, and SDIO types of memory cards.
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This file documents differences between the core properties in mmc.txt
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and the properties used by the mxsmmc driver.
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Required properties:
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- compatible: Should be "fsl,<chip>-mmc". The supported chips include
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imx23 and imx28.
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- interrupts: Should contain ERROR interrupt number
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- dmas: DMA specifier, consisting of a phandle to DMA controller node
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and SSP DMA channel ID.
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Refer to dma.txt and fsl-mxs-dma.txt for details.
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- dma-names: Must be "rx-tx".
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Examples:
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ssp0: ssp@80010000 {
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compatible = "fsl,imx28-mmc";
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reg = <0x80010000 2000>;
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interrupts = <96>;
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dmas = <&dma_apbh 0>;
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dma-names = "rx-tx";
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bus-width = <8>;
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};
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