Broadcom BCM2835 auxiliar SPI1/2 controller
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The BCM2835 contains two forms of SPI master controller, one known simply as
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SPI0, and the other known as the "Universal SPI Master"; part of the
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auxiliary block. This binding applies to the SPI1/2 controller.
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Required properties:
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- compatible: Should be "brcm,bcm2835-aux-spi".
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- reg: Should contain register location and length for the spi block
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- interrupts: Should contain shared interrupt of the aux block
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- clocks: The clock feeding the SPI controller - needs to
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point to the auxiliar clock driver of the bcm2835,
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as this clock will enable the output gate for the specific
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clock.
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- cs-gpios: the cs-gpios (native cs is NOT supported)
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see also spi-bus.txt
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Example:
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spi1@7e215080 {
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compatible = "brcm,bcm2835-aux-spi";
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reg = <0x7e215080 0x40>;
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interrupts = <1 29>;
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clocks = <&aux_clocks BCM2835_AUX_CLOCK_SPI1>;
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#address-cells = <1>;
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#size-cells = <0>;
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cs-gpios = <&gpio 18>, <&gpio 17>, <&gpio 16>;
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};
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spi2@7e2150c0 {
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compatible = "brcm,bcm2835-aux-spi";
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reg = <0x7e2150c0 0x40>;
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interrupts = <1 29>;
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clocks = <&aux_clocks BCM2835_AUX_CLOCK_SPI2>;
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#address-cells = <1>;
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#size-cells = <0>;
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cs-gpios = <&gpio 43>, <&gpio 44>, <&gpio 45>;
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};
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