tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1Hisilicon System Reset Controller
2======================================
3
4Please also refer to reset.txt in this directory for common reset
5controller binding usage.
6
7The reset controller registers are part of the system-ctl block on
8hi3660 SoC.
9
10Required properties:
11- compatible: should be
12 "hisilicon,hi3660-reset"
13- hisi,rst-syscon: phandle of the reset's syscon.
14- #reset-cells : Specifies the number of cells needed to encode a
15 reset source. The type shall be a <u32> and the value shall be 2.
16
17 Cell #1 : offset of the reset assert control
18 register from the syscon register base
19 offset + 4: deassert control register
20 offset + 8: status control register
21 Cell #2 : bit position of the reset in the reset control register
22
23Example:
24 iomcu: iomcu@ffd7e000 {
25 compatible = "hisilicon,hi3660-iomcu", "syscon";
26 reg = <0x0 0xffd7e000 0x0 0x1000>;
27 };
28
29 iomcu_rst: iomcu_rst_controller {
30 compatible = "hisilicon,hi3660-reset";
31 hisi,rst-syscon = <&iomcu>;
32 #reset-cells = <2>;
33 };
34
35Specifying reset lines connected to IP modules
36==============================================
37example:
38
39 i2c0: i2c@..... {
40 ...
41 resets = <&iomcu_rst 0x20 3>; /* offset: 0x20; bit: 3 */
42 ...
43 };