xref: /freebsd/sys/contrib/device-tree/Bindings/reset/sirf,rstc.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)

CSR SiRFSoC Reset Controller
======================================

Please also refer to reset.txt in this directory for common reset
controller binding usage.

Required properties:
- compatible: Should be "sirf,prima2-rstc" or "sirf,marco-rstc"
- reg: should be register base and length as documented in the
  datasheet
- #reset-cells: 1, see below

example:

rstc: reset-controller@88010000 {
	compatible = "sirf,prima2-rstc";
	reg = <0x88010000 0x1000>;
	#reset-cells = <1>;
};

Specifying reset lines connected to IP modules
==============================================

The reset controller(rstc) manages various reset sources. This module provides
reset signals for most blocks in system. Those device nodes should specify the
reset line on the rstc in their resets property, containing a phandle to the
rstc device node and a RESET_INDEX specifying which module to reset, as described
in reset.txt.

For SiRFSoC, RESET_INDEX is just reset_bit defined in SW_RST0 and SW_RST1 registers.
For modules whose rest_bit is in SW_RST0, its RESET_INDEX is 0~31. For modules whose
rest_bit is in SW_RST1, its RESET_INDEX is 32~63.

example:

vpp@90020000 {
	compatible = "sirf,prima2-vpp";
	reg = <0x90020000 0x10000>;
	interrupts = <31>;
	clocks = <&clks 35>;
	resets = <&rstc 6>;
};