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# 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;
};
};
...
|
