forked from Minki/linux
7f43a87e06
The fsl-imx-cspi binding contains language indicating compatible strings to be used that is not valid for all supported parts e.g. Should be "fsl,<soc>-cspi" or "fsl,<soc>-ecspi". Fix this by enumerating the set of valid compatible strings. The binding is also missing the clocks/clock-names properties so document these and the two required ipg and per clocks. Signed-off-by: Matt Porter <mporter@konsulko.com> Signed-off-by: Mark Brown <broonie@kernel.org>
38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
* Freescale (Enhanced) Configurable Serial Peripheral Interface
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(CSPI/eCSPI) for i.MX
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Required properties:
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- compatible :
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- "fsl,imx1-cspi" for SPI compatible with the one integrated on i.MX1
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- "fsl,imx21-cspi" for SPI compatible with the one integrated on i.MX21
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- "fsl,imx27-cspi" for SPI compatible with the one integrated on i.MX27
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- "fsl,imx31-cspi" for SPI compatible with the one integrated on i.MX31
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- "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35
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- "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51
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- reg : Offset and length of the register set for the device
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- interrupts : Should contain CSPI/eCSPI interrupt
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- fsl,spi-num-chipselects : Contains the number of the chipselect
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- cs-gpios : Specifies the gpio pins to be used for chipselects.
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- clocks : Clock specifiers for both ipg and per clocks.
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- clock-names : Clock names should include both "ipg" and "per"
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See the clock consumer binding,
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Documentation/devicetree/bindings/clock/clock-bindings.txt
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- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
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Documentation/devicetree/bindings/dma/dma.txt
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- dma-names: DMA request names should include "tx" and "rx" if present.
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Example:
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ecspi@70010000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,imx51-ecspi";
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reg = <0x70010000 0x4000>;
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interrupts = <36>;
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fsl,spi-num-chipselects = <2>;
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cs-gpios = <&gpio3 24 0>, /* GPIO3_24 */
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<&gpio3 25 0>; /* GPIO3_25 */
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dmas = <&sdma 3 7 1>, <&sdma 4 7 2>;
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dma-names = "rx", "tx";
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};
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