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addb32866d
Add introductions of clocks and clock-names strings. Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> Signed-off-by: Mark Brown <broonie@kernel.org>
30 lines
1.0 KiB
Plaintext
30 lines
1.0 KiB
Plaintext
* Freescale Low Power SPI (LPSPI) for i.MX
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Required properties:
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- compatible :
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- "fsl,imx7ulp-spi" for LPSPI compatible with the one integrated on i.MX7ULP soc
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- "fsl,imx8qxp-spi" for LPSPI compatible with the one integrated on i.MX8QXP soc
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- reg : address and length of the lpspi master registers
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- interrupt-parent : core interrupt controller
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- interrupts : lpspi interrupt
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- clocks : lpspi clock specifier. Its number and order need to correspond to the
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value in clock-names.
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- clock-names : Corresponding to per clock and ipg clock in "clocks"
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respectively. In i.MX7ULP, it only has per clk, so use CLK_DUMMY
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to fill the "ipg" blank.
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- spi-slave : spi slave mode support. In slave mode, add this attribute without
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value. In master mode, remove it.
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Examples:
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lpspi2: lpspi@40290000 {
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compatible = "fsl,imx7ulp-spi";
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reg = <0x40290000 0x10000>;
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interrupt-parent = <&intc>;
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interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&clks IMX7ULP_CLK_LPSPI2>,
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<&clks IMX7ULP_CLK_DUMMY>;
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clock-names = "per", "ipg";
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spi-slave;
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};
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