Lines Matching full:spi

1 Soft SPI
3 The soft SPI bus implementation allows the use of GPIO pins to simulate a
4 SPI bus. No SPI host is required for this to work. The down-side is that the
5 performance will typically be much lower than a real SPI bus.
7 The soft SPI node requires the following properties:
10 compatible: "spi-gpio"
11 cs-gpios: GPIOs to use for SPI chip select (output)
12 gpio-sck: GPIO to use for SPI clock (output)
14 gpio-mosi: GPIO to use for SPI MOSI line (output)
15 gpio-miso: GPIO to use for SPI MISO line (input)
18 spi-delay-us: Number of microseconds of delay between each CS transition
27 	soft-spi {
28 		compatible = "spi-gpio";
33 		spi-delay-us = <1>;