24 lines
654 B
Plaintext
24 lines
654 B
Plaintext
OLPC XO-1.75 Embedded Controller
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Required properties:
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- compatible: Should be "olpc,xo1.75-ec".
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- cmd-gpios: gpio specifier of the CMD pin
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The embedded controller requires the SPI controller driver to signal readiness
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to receive a transfer (that is, when TX FIFO contains the response data) by
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strobing the ACK pin with the ready signal. See the "ready-gpios" property of the
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SSP binding as documented in:
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<Documentation/devicetree/bindings/spi/spi-pxa2xx.txt>.
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Example:
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&ssp3 {
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spi-slave;
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ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>;
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slave {
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compatible = "olpc,xo1.75-ec";
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spi-cpha;
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cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>;
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};
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};
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