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[194.187.74.233]) by smtp.gmail.com with ESMTPSA id e15sm2552600lfs.83.2021.03.01.23.44.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Mar 2021 23:44:39 -0800 (PST) From: =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= To: Florian Fainelli , Rob Herring Cc: Vivek Unune , linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, devicetree@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-kernel@vger.kernel.org, =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= Subject: [PATCH stblinux.git 1/2] dt-bindings: firmware: add Broadcom's NVRAM memory mapping Date: Tue, 2 Mar 2021 08:44:04 +0100 Message-Id: <20210302074405.18998-1-zajec5@gmail.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org From: Rafał Miłecki NVRAM structure contains device data and can be accessed using MMIO. Signed-off-by: Rafał Miłecki --- .../bindings/firmware/brcm,nvram.yaml | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/firmware/brcm,nvram.yaml diff --git a/Documentation/devicetree/bindings/firmware/brcm,nvram.yaml b/Documentation/devicetree/bindings/firmware/brcm,nvram.yaml new file mode 100644 index 000000000000..12af8e2e7c9c --- /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 + +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>; + };