From: Rafał Miłecki <rafal@xxxxxxxxxx> This binding allows describing a (part of) MTD device (partition) that contains a block with environment variables. Operating system usually needs to parse that block to read variables values that may affect booting process & device configuration. Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx> --- V2: s/u,boot/u-boot/ --- .../devicetree/bindings/nvmem/u-boot,env.yaml | 56 +++++++++++++++++++ MAINTAINERS | 5 ++ 2 files changed, 61 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/u-boot,env.yaml diff --git a/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml b/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml new file mode 100644 index 000000000000..e3296e005ffd --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/u-boot,env.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: U-Boot environment variables + +description: | + U-Boot uses environment variables to store device parameters and + configuration. They may be used for booting process, setup or keeping end user + interesting info. + + Data is stored on flash partition in a U-Boot specific format (CRC32 and NUL + separated key-value pairs). + + This binding allows specifying data location and format (default one or vendor + specific). + +maintainers: + - Rafał Miłecki <rafal@xxxxxxxxxx> + +allOf: + - $ref: nvmem.yaml# + +properties: + compatible: + enum: + - u-boot,env + - brcm,env + + reg: + maxItems: 1 + +unevaluatedProperties: false + +examples: + - | + partitions { + compatible = "fixed-partitions"; + #address-cells = <1>; + #size-cells = <1>; + + partition@0 { + label = "uboot"; + reg = <0x0 0x100000>; + + #address-cells = <1>; + #size-cells = <1>; + + nvmem@10000 { + compatible = "u-boot,env"; + reg = <0x10000 0x10000>; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 67558097bb66..271c29c84c7d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19624,6 +19624,11 @@ W: http://linuxtv.org T: git git://linuxtv.org/media_tree.git F: drivers/media/pci/tw686x/ +U-BOOT ENVIRONMENT VARIABLES +M: Rafał Miłecki <rafal@xxxxxxxxxx> +S: Maintained +F: Documentation/devicetree/bindings/nvmem/u-boot,env.yaml + UACCE ACCELERATOR FRAMEWORK M: Zhangfei Gao <zhangfei.gao@xxxxxxxxxx> M: Zhou Wang <wangzhou1@xxxxxxxxxxxxx> -- 2.31.1
