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b.liue9582032025-04-17 19:18:16 +08001* CSR SiRFprimaII Serial Peripheral Interface
2
3Required properties:
4- compatible : Should be "sirf,prima2-spi", "sirf,prima2-usp"
5 or "sirf,atlas7-usp"
6- reg : Offset and length of the register set for the device
7- interrupts : Should contain SPI interrupt
8- resets: phandle to the reset controller asserting this device in
9 reset
10 See ../reset/reset.txt for details.
11- dmas : Must contain an entry for each entry in clock-names.
12 See ../dma/dma.txt for details.
13- dma-names : Must include the following entries:
14 - rx
15 - tx
16- clocks : Must contain an entry for each entry in clock-names.
17 See ../clocks/clock-bindings.txt for details.
18
19- #address-cells: Number of cells required to define a chip select
20 address on the SPI bus. Should be set to 1.
21- #size-cells: Should be zero.
22
23Optional properties:
24- spi-max-frequency: Specifies maximum SPI clock frequency,
25 Units - Hz. Definition as per
26 Documentation/devicetree/bindings/spi/spi-bus.txt
27- cs-gpios: should specify GPIOs used for chipselects.
28
29Example:
30
31spi0: spi@b00d0000 {
32 compatible = "sirf,prima2-spi";
33 reg = <0xb00d0000 0x10000>;
34 interrupts = <15>;
35 dmas = <&dmac1 9>,
36 <&dmac1 4>;
37 dma-names = "rx", "tx";
38 #address-cells = <1>;
39 #size-cells = <0>;
40 clocks = <&clks 19>;
41 resets = <&rstc 26>;
42};