| # 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; |
| }; |
| }; |
| ... |
