tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1* NXP Flex Serial Peripheral Interface (FSPI)
2
3Required properties:
4 - compatible : Should be "nxp,lx2160a-fspi"
5 "nxp,imx8qxp-fspi"
6 "nxp,imx8mm-fspi"
7
8 - reg : First contains the register location and length,
9 Second contains the memory mapping address and length
10 - reg-names : Should contain the resource reg names:
11 - fspi_base: configuration register address space
12 - fspi_mmap: memory mapped address space
13 - interrupts : Should contain the interrupt for the device
14
15Required SPI slave node properties:
16 - reg : There are two buses (A and B) with two chip selects each.
17 This encodes to which bus and CS the flash is connected:
18 - <0>: Bus A, CS 0
19 - <1>: Bus A, CS 1
20 - <2>: Bus B, CS 0
21 - <3>: Bus B, CS 1
22
23Example showing the usage of two SPI NOR slave devices on bus A:
24
25fspi0: spi@20c0000 {
26 compatible = "nxp,lx2160a-fspi";
27 reg = <0x0 0x20c0000 0x0 0x10000>, <0x0 0x20000000 0x0 0x10000000>;
28 reg-names = "fspi_base", "fspi_mmap";
29 interrupts = <0 25 0x4>; /* Level high type */
30 clocks = <&clockgen 4 3>, <&clockgen 4 3>;
31 clock-names = "fspi_en", "fspi";
32
33 mt35xu512aba0: flash@0 {
34 reg = <0>;
35 ....
36 };
37
38 mt35xu512aba1: flash@1 {
39 reg = <1>;
40 ....
41 };
42};