mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-08-31 22:23:05 +00:00
62a65b32bd
Convert the PMEM device tree binding from text to YAML. This will allow device trees with pmem-region nodes to pass dtbs_check. [iweiny: fix ups from Rob/Drew] Acked-by: Conor Dooley <conor.dooley@microchip.com> Acked-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Drew Fustini <drew@pdp7.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Link: https://patch.msgid.link/20250606184405.359812-4-drew@pdp7.com Signed-off-by: Ira Weiny <ira.weiny@intel.com>
49 lines
1.2 KiB
YAML
49 lines
1.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/pmem-region.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
maintainers:
|
|
- Oliver O'Halloran <oohall@gmail.com>
|
|
|
|
title: Persistent Memory Regions
|
|
|
|
description: |
|
|
Persistent memory refers to a class of memory devices that are:
|
|
|
|
a) Usable as main system memory (i.e. cacheable), and
|
|
b) Retain their contents across power failure.
|
|
|
|
Given b) it is best to think of persistent memory as a kind of memory mapped
|
|
storage device. To ensure data integrity the operating system needs to manage
|
|
persistent regions separately to the normal memory pool. To aid with that this
|
|
binding provides a standardised interface for discovering where persistent
|
|
memory regions exist inside the physical address space.
|
|
|
|
properties:
|
|
compatible:
|
|
const: pmem-region
|
|
|
|
reg:
|
|
maxItems: 1
|
|
|
|
volatile:
|
|
description:
|
|
Indicates the region is volatile (non-persistent) and the OS can skip
|
|
cache flushes for writes
|
|
type: boolean
|
|
|
|
required:
|
|
- compatible
|
|
- reg
|
|
|
|
additionalProperties: false
|
|
|
|
examples:
|
|
- |
|
|
pmem@5000 {
|
|
compatible = "pmem-region";
|
|
reg = <0x00005000 0x00001000>;
|
|
};
|