1 * Nuvoton FLASH Interface Unit (FIU) SPI Controller
2
3 NPCM FIU supports single, dual and quad communication interface.
4
5 The NPCM7XX supports three FIU modules,
6 FIU0 and FIUx supports two chip selects,
7 FIU3 support four chip select.
8
9 The NPCM8XX supports four FIU modules,
10 FIU0 and FIUx supports two chip selects,
11 FIU1 and FIU3 supports four chip selects.
12
13 Required properties:
14 - compatible : "nuvoton,npcm750-fiu" for Poleg NPCM7XX BMC
15 "nuvoton,npcm845-fiu" for Arbel NPCM8XX BMC
16 - #address-cells : should be 1.
17 - #size-cells : should be 0.
18 - reg : the first contains the register location and length,
19 the second contains the memory mapping address and length
20 - reg-names: Should contain the reg names "control" and "memory"
21 - clocks : phandle of FIU reference clock.
22
23 Required properties in case the pins can be muxed:
24 - pinctrl-names : a pinctrl state named "default" must be defined.
25 - pinctrl-0 : phandle referencing pin configuration of the device.
26
27 Optional property:
28 - nuvoton,spix-mode: enable spix-mode for an expansion bus to an ASIC or CPLD.
29
30 Aliases:
31 - All the FIU controller nodes should be represented in the aliases node using
32 the following format 'fiu{n}' where n is a unique number for the alias.
33 In the NPCM7XX BMC:
34 fiu0 represent fiu 0 controller
35 fiu1 represent fiu 3 controller
36 fiu2 represent fiu x controller
37
38 In the NPCM8XX BMC:
39 fiu0 represent fiu 0 controller
40 fiu1 represent fiu 1 controller
41 fiu2 represent fiu 3 controller
42 fiu3 represent fiu x controller
43
44 Example:
45 fiu3: spi@c00000000 {
46 compatible = "nuvoton,npcm750-fiu";
47 #address-cells = <1>;
48 #size-cells = <0>;
49 reg = <0xfb000000 0x1000>, <0x80000000 0x10000000>;
50 reg-names = "control", "memory";
51 clocks = <&clk NPCM7XX_CLK_AHB>;
52 pinctrl-names = "default";
53 pinctrl-0 = <&spi3_pins>;
54 flash@0 {
55 ...
56 };
57 };
58
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.