xref: /kernel/linux/linux-5.10/Documentation/devicetree/bindings/reset/hisilicon,hi3660-reset.txt

Hisilicon System Reset Controller
======================================

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

The reset controller registers are part of the system-ctl block on
hi3660 and hi3670 SoCs.

Required properties:
- compatible: should be one of the following:
		 "hisilicon,hi3660-reset" for HI3660
		 "hisilicon,hi3670-reset", "hisilicon,hi3660-reset" for HI3670
- hisi,rst-syscon: phandle of the reset's syscon.
- #reset-cells : Specifies the number of cells needed to encode a
  reset source.  The type shall be a <u32> and the value shall be 2.

	 Cell #1 : offset of the reset assert control
	           register from the syscon register base
		   offset + 4: deassert control register
		   offset + 8: status control register
	 Cell #2 : bit position of the reset in the reset control register

Example:
	iomcu: iomcu@ffd7e000 {
		compatible = "hisilicon,hi3660-iomcu", "syscon";
		reg = <0x0 0xffd7e000 0x0 0x1000>;
	};

	iomcu_rst: iomcu_rst_controller {
		compatible = "hisilicon,hi3660-reset";
		hisi,rst-syscon = <&iomcu>;
		#reset-cells = <2>;
	};

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

        i2c0: i2c@..... {
                ...
		resets = <&iomcu_rst 0x20 3>; /* offset: 0x20; bit: 3 */
                ...
        };