From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: srinivas.kandagatla@linaro.org,
Saenz Julienne <nsaenzjulienne@suse.de>,
devicetree@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, linux@armlinux.org.uk,
catalin.marinas@arm.com, will@kernel.org, robh+dt@kernel.org,
tim.gover@raspberrypi.com, phil@raspberrypi.com
Subject: [PATCH 1/6] dt-bindings: nvmem: Add bindings for rmem driver
Date: Tue, 15 Dec 2020 16:56:21 +0100 [thread overview]
Message-ID: <20201215155627.2513-2-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20201215155627.2513-1-nsaenzjulienne@suse.de>
Firmware/co-processors might use reserved memory areas in order to pass
data stemming from an nvmem device otherwise non accessible to Linux.
For example an EEPROM memory only physically accessible to firmware, or
data only accessible early at boot time.
Introduce the dt-bindings to nvmem's rmem.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
.../devicetree/bindings/nvmem/rmem.yaml | 35 +++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644 Documentation/devicetree/bindings/nvmem/rmem.yaml
diff --git a/Documentation/devicetree/bindings/nvmem/rmem.yaml b/Documentation/devicetree/bindings/nvmem/rmem.yaml
new file mode 100644
index 000000000000..3037ebc4634d
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/rmem.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/rmem.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Reserved Memory Based nvmem Device
+
+maintainers:
+ - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+
+properties:
+ compatible:
+ enum:
+ - nvmem-rmem
+
+ memory-region:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ phandle to the reserved memory region
+
+required:
+ - compatible
+ - memory-region
+
+additionalProperties: false
+
+examples:
+ - |
+ fw-config {
+ compatible = "nvmem-rmem";
+ memory-region = <&mem>;
+ };
+
+...
--
2.29.2
next prev parent reply other threads:[~2020-12-15 16:04 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-15 15:56 [PATCH 0/6] Expose RPi4'd bootloader configuration Nicolas Saenz Julienne
2020-12-15 15:56 ` Nicolas Saenz Julienne [this message]
2020-12-15 20:25 ` [PATCH 1/6] dt-bindings: nvmem: Add bindings for rmem driver Rob Herring
2020-12-15 21:16 ` Nicolas Saenz Julienne
2020-12-15 15:56 ` [PATCH 2/6] nvmem: Add driver to expose reserved memory as nvmem Nicolas Saenz Julienne
2020-12-15 15:56 ` [PATCH 3/6] ARM: dts: bcm2711: Add reserved memory template to hold firmware configuration Nicolas Saenz Julienne
2020-12-15 20:27 ` Rob Herring
2020-12-15 15:56 ` [PATCH 4/6] ARM: dts: bcm2711: Expose boot-loader configuration Nicolas Saenz Julienne
2020-12-15 15:56 ` [PATCH 5/6] arm64: defconfig: Enable nvmem's rmem driver Nicolas Saenz Julienne
2020-12-15 15:56 ` [PATCH 6/6] ARM: multi_v7_defconfig: " Nicolas Saenz Julienne
2020-12-15 16:05 ` [PATCH 0/6] Expose RPi4'd bootloader configuration Nicolas Saenz Julienne
2020-12-15 18:44 ` Catalin Marinas
2020-12-15 19:01 ` Nicolas Saenz Julienne
2020-12-15 19:54 ` Rob Herring
2020-12-15 21:21 ` Nicolas Saenz Julienne
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