st,sti-softreset.txt

 1STMicroelectronics STi family Sysconfig Peripheral SoftReset Controller
 2=============================================================================
 3
 4This binding describes a reset controller device that is used to enable and
 5disable on-chip peripheral controllers such as USB and SATA, using
 6"softreset" control bits found in the STi family SoC system configuration
 7registers.
 8
 9The actual action taken when softreset is asserted is hardware dependent.
10However, when asserted it may not be possible to access the hardware's
11registers and after an assert/deassert sequence the hardware's previous state
12may no longer be valid.
13
14Please refer to reset.txt in this directory for common reset
15controller binding usage.
16
17Required properties:
18- compatible: Should be "st,stih407-softreset";
19- #reset-cells: 1, see below
20
21example:
22
23	softreset: softreset-controller {
24		#reset-cells = <1>;
25		compatible = "st,stih407-softreset";
26	};
27
28
29Specifying softreset control of devices
30=======================================
31
32Device nodes should specify the reset channel required in their "resets"
33property, containing a phandle to the softreset device node and an
34index specifying which channel to use, as described in reset.txt
35
36example:
37
38	ethernet0{
39		resets			= <&softreset STIH415_ETH0_SOFTRESET>;
40	};
41
42Macro definitions for the supported reset channels can be found in:
43
44include/dt-bindings/reset/stih407-resets.h