xref: /linux/Documentation/devicetree/bindings/mtd/st,spear600-smi.yaml (revision 1b49e363252632d0493546511a41a65ed1a6fbbb) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/mtd/st,spear600-smi.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: STMicroelectronics SPEAr600 Serial Memory Interface (SMI) Controller
8
9maintainers:
10  - Richard Weinberger <richard@nod.at>
11
12description:
13  The SPEAr600 Serial Memory Interface (SMI) is a dedicated serial flash
14  controller supporting up to four chip selects for serial NOR flashes
15  connected in parallel. The controller is memory-mapped and the attached
16  flash devices appear in the CPU address space.The driver
17  (drivers/mtd/devices/spear_smi.c) probes the attached flashes
18  dynamically by sending commands (e.g., RDID) to each bank.
19  Flash sub nodes describe the memory range and optional per-flash
20  properties.
21
22allOf:
23  - $ref: mtd.yaml#
24
25properties:
26  compatible:
27    const: st,spear600-smi
28
29  reg:
30    maxItems: 1
31
32  interrupts:
33    maxItems: 1
34
35  "#address-cells":
36    const: 1
37
38  "#size-cells":
39    const: 1
40
41  clock-rate:
42    $ref: /schemas/types.yaml#/definitions/uint32
43    description: Functional clock rate of the SMI controller in Hz.
44
45  st,smi-fast-mode:
46    type: boolean
47    description: Indicates that the attached flash supports fast read mode.
48
49required:
50  - compatible
51  - reg
52  - clock-rate
53
54unevaluatedProperties: false
55
56examples:
57  - |
58    flash@fc000000 {
59        compatible = "st,spear600-smi";
60        #address-cells = <1>;
61        #size-cells = <1>;
62        reg = <0xfc000000 0x1000>;
63        interrupt-parent = <&vic1>;
64        interrupts = <12>;
65        clock-rate = <50000000>;  /* 50 MHz */
66
67        flash@f8000000 {
68            reg = <0xfc000000 0x1000>;
69            st,smi-fast-mode;
70        };
71    };
72...
73