1 Devicetree binding for regmap
2
3 Optional properties:
4
5 little-endian,
6 big-endian,
7 native-endian: See common-properties.txt for a definition
8
9 Note:
10 Regmap defaults to little-endian register access on MMIO based
11 devices, this is by far the most common setting. On CPU
12 architectures that typically run big-endian operating systems
13 (e.g. PowerPC), registers can be defined as big-endian and must
14 be marked that way in the devicetree.
15
16 On SoCs that can be operated in both big-endian and little-endian
17 modes, with a single hardware switch controlling both the endianness
18 of the CPU and a byteswap for MMIO registers (e.g. many Broadcom MIPS
19 chips), "native-endian" is used to allow using the same device tree
20 blob in both cases.
21
22 Examples:
23 Scenario 1 : a register set in big-endian mode.
24 dev: dev@40031000 {
25 compatible = "syscon";
26 reg = <0x40031000 0x1000>;
27 big-endian;
28 ...
29 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.