iio/resolver/ad2s90.txt

1 Analog Devices AD2S90 Resolver-to-Digital Converter
6   - compatible: should be "adi,ad2s90"
7   - reg: SPI chip select number for the device
8   - spi-max-frequency: set maximum clock frequency, must be 830000
9   - spi-cpol and spi-cpha:
10         Either SPI mode (0,0) or (1,1) must be used, so specify none or both of
11         spi-cpha, spi-cpol.
14     Documentation/devicetree/bindings/spi/spi-bus.txt
16 Note about max frequency:
17     Chip's max frequency, as specified in its datasheet, is 2Mhz. But a 600ns
20     implemented in the spi code, to satisfy it, SCLK's period should be at most
21     2 * 600ns, so the max frequency should be 1 / (2 * 6e-7), which gives
28 	spi-max-frequency = <830000>;
29 	spi-cpol;
30 	spi-cpha;