xref: /linux/Documentation/devicetree/bindings/mtd/st,spear600-smi.yaml (revision 6ac513185c410f9404ff66b920bec137cbc6e543)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mtd/st,spear600-smi.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: STMicroelectronics SPEAr600 Serial Memory Interface (SMI) Controller

maintainers:
  - Richard Weinberger <richard@nod.at>

description:
  The SPEAr600 Serial Memory Interface (SMI) is a dedicated serial flash
  controller supporting up to four chip selects for serial NOR flashes
  connected in parallel. The controller is memory-mapped and the attached
  flash devices appear in the CPU address space.The driver
  (drivers/mtd/devices/spear_smi.c) probes the attached flashes
  dynamically by sending commands (e.g., RDID) to each bank.
  Flash sub nodes describe the memory range and optional per-flash
  properties.

properties:
  compatible:
    const: st,spear600-smi

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  "#address-cells":
    const: 1

  "#size-cells":
    const: 1

  clock-rate:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: Functional clock rate of the SMI controller in Hz.

patternProperties:
  "^flash@.*$":
    $ref: /schemas/mtd/mtd.yaml#

    properties:
      reg:
        maxItems: 1

      st,smi-fast-mode:
        type: boolean
        description: Indicates that the attached flash supports fast read mode.

    unevaluatedProperties: false

    required:
      - reg

required:
  - compatible
  - reg
  - clock-rate
  - "#address-cells"
  - "#size-cells"

unevaluatedProperties: false

examples:
  - |
    flash@fc000000 {
        compatible = "st,spear600-smi";
        #address-cells = <1>;
        #size-cells = <1>;
        reg = <0xfc000000 0x1000>;
        interrupt-parent = <&vic1>;
        interrupts = <12>;
        clock-rate = <50000000>;  /* 50 MHz */

        flash@fc000000 {
            reg = <0xfc000000 0x1000>;
            st,smi-fast-mode;
        };
    };
...