bindings/spi/icpdas-lp8841-spi-rtc.txt

1 * ICP DAS LP-8841 SPI Controller for RTC
3 ICP DAS LP-8841 contains a DS-1302 RTC. RTC is connected to an IO
6 The device uses the standard MicroWire half-duplex transfer timing.
7 Master output is set on low clock and sensed by the RTC on the rising
8 edge. Master input is set by the RTC on the trailing edge and is sensed
9 by the master on low clock.
13 - #address-cells: should be 1
15 - #size-cells: should be 0
17 - compatible: should be "icpdas,lp8841-spi-rtc"
19 - reg: should provide IO memory address
23 - There can be only one slave device.
25 - The spi slave node should claim the following flags which are
28   - spi-3wire: The master itself has only 3 wire. It cannor work in
31   - spi-cs-high: DS-1302 has active high chip select line. The master
32     doesn't support active low.
34   - spi-lsb-first: DS-1302 requires least significant bit first
41 	#address-cells = <1>;
42 	#size-cells = <0>;
43 	compatible = "icpdas,lp8841-spi-rtc";
49 		spi-max-frequency = <500000>;
50 		spi-3wire;
51 		spi-lsb-first;
52 		spi-cs-high;