tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1ARM Freescale DSPI controller
2
3Required properties:
4- compatible : "fsl,vf610-dspi", "fsl,ls1021a-v1.0-dspi", "fsl,ls2085a-dspi"
5- reg : Offset and length of the register set for the device
6- interrupts : Should contain SPI controller interrupt
7- clocks: from common clock binding: handle to dspi clock.
8- clock-names: from common clock binding: Shall be "dspi".
9- pinctrl-0: pin control group to be used for this controller.
10- pinctrl-names: must contain a "default" entry.
11- spi-num-chipselects : the number of the chipselect signals.
12- bus-num : the slave chip chipselect signal number.
13
14Optional property:
15- big-endian: If present the dspi device's registers are implemented
16 in big endian mode, otherwise in native mode(same with CPU), for more
17 detail please see: Documentation/devicetree/bindings/regmap/regmap.txt.
18
19Optional SPI slave node properties:
20- fsl,spi-cs-sck-delay: a delay in nanoseconds between activating chip
21 select and the start of clock signal, at the start of a transfer.
22- fsl,spi-sck-cs-delay: a delay in nanoseconds between stopping the clock
23 signal and deactivating chip select, at the end of a transfer.
24
25Example:
26
27dspi0@4002c000 {
28 #address-cells = <1>;
29 #size-cells = <0>;
30 compatible = "fsl,vf610-dspi";
31 reg = <0x4002c000 0x1000>;
32 interrupts = <0 67 0x04>;
33 clocks = <&clks VF610_CLK_DSPI0>;
34 clock-names = "dspi";
35 spi-num-chipselects = <5>;
36 bus-num = <0>;
37 pinctrl-names = "default";
38 pinctrl-0 = <&pinctrl_dspi0_1>;
39 big-endian;
40 status = "okay";
41
42 sflash: at26df081a@0 {
43 #address-cells = <1>;
44 #size-cells = <1>;
45 compatible = "atmel,at26df081a";
46 spi-max-frequency = <16000000>;
47 spi-cpol;
48 spi-cpha;
49 reg = <0>;
50 linux,modalias = "m25p80";
51 modal = "at26df081a";
52 fsl,spi-cs-sck-delay = <100>;
53 fsl,spi-sck-cs-delay = <50>;
54 };
55};
56
57