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",
5 "fsl,ls2085a-dspi"
6 or
7 "fsl,ls2080a-dspi" followed by "fsl,ls2085a-dspi"
8 "fsl,ls1012a-dspi" followed by "fsl,ls1021a-v1.0-dspi"
9- reg : Offset and length of the register set for the device
10- interrupts : Should contain SPI controller interrupt
11- clocks: from common clock binding: handle to dspi clock.
12- clock-names: from common clock binding: Shall be "dspi".
13- pinctrl-0: pin control group to be used for this controller.
14- pinctrl-names: must contain a "default" entry.
15- spi-num-chipselects : the number of the chipselect signals.
16- bus-num : the slave chip chipselect signal number.
17
18Optional property:
19- big-endian: If present the dspi device's registers are implemented
20 in big endian mode.
21
22Optional SPI slave node properties:
23- fsl,spi-cs-sck-delay: a delay in nanoseconds between activating chip
24 select and the start of clock signal, at the start of a transfer.
25- fsl,spi-sck-cs-delay: a delay in nanoseconds between stopping the clock
26 signal and deactivating chip select, at the end of a transfer.
27
28Example:
29
30dspi0@4002c000 {
31 #address-cells = <1>;
32 #size-cells = <0>;
33 compatible = "fsl,vf610-dspi";
34 reg = <0x4002c000 0x1000>;
35 interrupts = <0 67 0x04>;
36 clocks = <&clks VF610_CLK_DSPI0>;
37 clock-names = "dspi";
38 spi-num-chipselects = <5>;
39 bus-num = <0>;
40 pinctrl-names = "default";
41 pinctrl-0 = <&pinctrl_dspi0_1>;
42 big-endian;
43
44 sflash: at26df081a@0 {
45 #address-cells = <1>;
46 #size-cells = <1>;
47 compatible = "atmel,at26df081a";
48 spi-max-frequency = <16000000>;
49 spi-cpol;
50 spi-cpha;
51 reg = <0>;
52 linux,modalias = "m25p80";
53 modal = "at26df081a";
54 fsl,spi-cs-sck-delay = <100>;
55 fsl,spi-sck-cs-delay = <50>;
56 };
57};
58
59