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- Device-Tree binding for regmap
- The endianness mode of CPU & Device scenarios:
- Index Device Endianness properties
- ---------------------------------------------------
- 1 BE 'big-endian'
- 2 LE 'little-endian'
- For one device driver, which will run in different scenarios above
- on different SoCs using the devicetree, we need one way to simplify
- this.
- Required properties:
- - {big,little}-endian: these are boolean properties, if absent
- meaning that the CPU and the Device are in the same endianness mode,
- these properties are for register values and all the buffers only.
- Examples:
- Scenario 1 : CPU in LE mode & device in LE mode.
- dev: dev@40031000 {
- compatible = "name";
- reg = <0x40031000 0x1000>;
- ...
- };
- Scenario 2 : CPU in LE mode & device in BE mode.
- dev: dev@40031000 {
- compatible = "name";
- reg = <0x40031000 0x1000>;
- ...
- big-endian;
- };
- Scenario 3 : CPU in BE mode & device in BE mode.
- dev: dev@40031000 {
- compatible = "name";
- reg = <0x40031000 0x1000>;
- ...
- };
- Scenario 4 : CPU in BE mode & device in LE mode.
- dev: dev@40031000 {
- compatible = "name";
- reg = <0x40031000 0x1000>;
- ...
- little-endian;
- };
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