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 and hi3670 SoCs.
9
10Required properties:
11- compatible: should be one of the following:
12 "hisilicon,hi3660-reset" for HI3660
13 "hisilicon,hi3670-reset", "hisilicon,hi3660-reset" for HI3670
14- hisi,rst-syscon: phandle of the reset's syscon.
15- #reset-cells : Specifies the number of cells needed to encode a
16 reset source. The type shall be a <u32> and the value shall be 2.
17
18 Cell #1 : offset of the reset assert control
19 register from the syscon register base
20 offset + 4: deassert control register
21 offset + 8: status control register
22 Cell #2 : bit position of the reset in the reset control register
23
24Example:
25 iomcu: iomcu@ffd7e000 {
26 compatible = "hisilicon,hi3660-iomcu", "syscon";
27 reg = <0x0 0xffd7e000 0x0 0x1000>;
28 };
29
30 iomcu_rst: iomcu_rst_controller {
31 compatible = "hisilicon,hi3660-reset";
32 hisi,rst-syscon = <&iomcu>;
33 #reset-cells = <2>;
34 };
35
36Specifying reset lines connected to IP modules
37==============================================
38example:
39
40 i2c0: i2c@..... {
41 ...
42 resets = <&iomcu_rst 0x20 3>; /* offset: 0x20; bit: 3 */
43 ...
44 };