diff options
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/nvmem/nvmem-consumer.yaml | 45 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/nvmem/nvmem.txt | 81 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/nvmem/nvmem.yaml | 93 |
3 files changed, 139 insertions, 80 deletions
diff --git a/Documentation/devicetree/bindings/nvmem/nvmem-consumer.yaml b/Documentation/devicetree/bindings/nvmem/nvmem-consumer.yaml new file mode 100644 index 000000000000..b7c00ed31085 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/nvmem-consumer.yaml @@ -0,0 +1,45 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/nvmem-consumer.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVMEM (Non Volatile Memory) Consumer Device Tree Bindings + +maintainers: + - Srinivas Kandagatla <srinivas.kandagatla@linaro.org> + +select: true + +properties: + nvmem: + $ref: /schemas/types.yaml#/definitions/phandle-array + description: + List of phandle to the nvmem providers. + + nvmem-cells: + $ref: /schemas/types.yaml#/definitions/phandle-array + description: + List of phandle to the nvmem data cells. + + nvmem-names: + $ref: /schemas/types.yaml#/definitions/string-array + description: + Names for the each nvmem provider. + + nvmem-cell-names: + $ref: /schemas/types.yaml#/definitions/string-array + description: + Names for each nvmem-cells specified. + +dependencies: + nvmem-names: [ nvmem ] + nvmem-cell-names: [ nvmem-cells ] + +examples: + - | + tsens { + /* ... */ + nvmem-cells = <&tsens_calibration>; + nvmem-cell-names = "calibration"; + }; diff --git a/Documentation/devicetree/bindings/nvmem/nvmem.txt b/Documentation/devicetree/bindings/nvmem/nvmem.txt index fd06c09b822b..46a7ef485e24 100644 --- a/Documentation/devicetree/bindings/nvmem/nvmem.txt +++ b/Documentation/devicetree/bindings/nvmem/nvmem.txt @@ -1,80 +1 @@ -= NVMEM(Non Volatile Memory) Data Device Tree Bindings = - -This binding is intended to represent the location of hardware -configuration data stored in NVMEMs like eeprom, efuses and so on. - -On a significant proportion of boards, the manufacturer has stored -some data on NVMEM, for the OS to be able to retrieve these information -and act upon it. Obviously, the OS has to know about where to retrieve -these data from, and where they are stored on the storage device. - -This document is here to document this. - -= Data providers = -Contains bindings specific to provider drivers and data cells as children -of this node. - -Optional properties: - read-only: Mark the provider as read only. - -= Data cells = -These are the child nodes of the provider which contain data cell -information like offset and size in nvmem provider. - -Required properties: -reg: specifies the offset in byte within the storage device. - -Optional properties: - -bits: Is pair of bit location and number of bits, which specifies offset - in bit and number of bits within the address range specified by reg property. - Offset takes values from 0-7. - -For example: - - /* Provider */ - qfprom: qfprom@700000 { - ... - - /* Data cells */ - tsens_calibration: calib@404 { - reg = <0x404 0x10>; - }; - - tsens_calibration_bckp: calib_bckp@504 { - reg = <0x504 0x11>; - bits = <6 128> - }; - - pvs_version: pvs-version@6 { - reg = <0x6 0x2> - bits = <7 2> - }; - - speed_bin: speed-bin@c{ - reg = <0xc 0x1>; - bits = <2 3>; - - }; - ... - }; - -= Data consumers = -Are device nodes which consume nvmem data cells/providers. - -Required-properties: -nvmem-cells: list of phandle to the nvmem data cells. -nvmem-cell-names: names for the each nvmem-cells specified. Required if - nvmem-cells is used. - -Optional-properties: -nvmem : list of phandles to nvmem providers. -nvmem-names: names for the each nvmem provider. required if nvmem is used. - -For example: - - tsens { - ... - nvmem-cells = <&tsens_calibration>; - nvmem-cell-names = "calibration"; - }; +This file has been moved to nvmem.yaml and nvmem-consumer.yaml. diff --git a/Documentation/devicetree/bindings/nvmem/nvmem.yaml b/Documentation/devicetree/bindings/nvmem/nvmem.yaml new file mode 100644 index 000000000000..1c75a059206c --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/nvmem.yaml @@ -0,0 +1,93 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/nvmem.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVMEM (Non Volatile Memory) Device Tree Bindings + +maintainers: + - Srinivas Kandagatla <srinivas.kandagatla@linaro.org> + +description: | + This binding is intended to represent the location of hardware + configuration data stored in NVMEMs like eeprom, efuses and so on. + + On a significant proportion of boards, the manufacturer has stored + some data on NVMEM, for the OS to be able to retrieve these + information and act upon it. Obviously, the OS has to know about + where to retrieve these data from, and where they are stored on the + storage device. + +properties: + $nodename: + pattern: "^(eeprom|efuse|nvram)(@.*|-[0-9a-f])*$" + + "#address-cells": + const: 1 + + "#size-cells": + const: 1 + + read-only: + $ref: /schemas/types.yaml#/definitions/flag + description: + Mark the provider as read only. + +patternProperties: + "^.*@[0-9a-f]+$": + type: object + + properties: + reg: + maxItems: 1 + description: + Offset and size in bytes within the storage device. + + bits: + maxItems: 1 + items: + items: + - minimum: 0 + maximum: 7 + description: + Offset in bit within the address range specified by reg. + - minimum: 1 + description: + Size in bit within the address range specified by reg. + + required: + - reg + + additionalProperties: false + +examples: + - | + qfprom: eeprom@700000 { + #address-cells = <1>; + #size-cells = <1>; + + /* ... */ + + /* Data cells */ + tsens_calibration: calib@404 { + reg = <0x404 0x10>; + }; + + tsens_calibration_bckp: calib_bckp@504 { + reg = <0x504 0x11>; + bits = <6 128>; + }; + + pvs_version: pvs-version@6 { + reg = <0x6 0x2>; + bits = <7 2>; + }; + + speed_bin: speed-bin@c{ + reg = <0xc 0x1>; + bits = <2 3>; + }; + }; + +... |