tjh.dev
Linux kernel mirror (for testing)
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kernel
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linux
1OLPC XO-1.75 Embedded Controller
2
3Required properties:
4- compatible: Should be "olpc,xo1.75-ec".
5- cmd-gpios: gpio specifier of the CMD pin
6
7The embedded controller requires the SPI controller driver to signal readiness
8to receive a transfer (that is, when TX FIFO contains the response data) by
9strobing the ACK pin with the ready signal. See the "ready-gpios" property of the
10SSP binding as documented in:
11<Documentation/devicetree/bindings/spi/spi-pxa2xx.txt>.
12
13Example:
14 &ssp3 {
15 spi-slave;
16 ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>;
17
18 slave {
19 compatible = "olpc,xo1.75-ec";
20 spi-cpha;
21 cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>;
22 };
23 };