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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Tue, 2 Mar 2021 08:23:35 +0100
Subject: [PATCH] dt-bindings: firmware: add Broadcom's NVRAM memory mapping
NVRAM structure contains device data and can be accessed using MMIO.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
.../bindings/firmware/brcm,nvram.yaml | 41 +++++++++++++++++++
1 file changed, 41 insertions(+)
create mode 100644 Documentation/devicetree/bindings/firmware/brcm,nvram.yaml
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/brcm,nvram.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/firmware/brcm,nvram.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Broadcom's NVRAM
+
+maintainers:
+ - Rafał Miłecki <rafal@milecki.pl>
+
+description: |
+ NVRAM is a structure containing device specific environment variables.
+ It is used for storing device configuration, booting parameters and
+ calibration data.
+
+ It's required very early in booting process and so is made available
+ using memory mapping.
+
+ NVRAM can be found on Broadcom BCM47xx MIPS, Northstar ARM Cortex-A9
+ and some more devices.
+
+properties:
+ compatible:
+ const: brcm,nvram
+
+ reg:
+ description: memory region with NVRAM data
+ maxItems: 1
+
+required:
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ nvram@1e000000 {
+ compatible = "brcm,nvram";
+ reg = <0x1e000000 0x10000>;
+ };
|
