regmap.txt

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