xref: /linux/Documentation/devicetree/bindings/reset/st,stih407-picophyreset.yaml (revision 8bb5e7f4dcd9b9ef22a3ea25c9066a8a968f12dd) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/reset/st,stih407-picophyreset.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: STMicroelectronics STi family Sysconfig Picophy SoftReset Controller
8
9maintainers:
10  - Peter Griffin <peter.griffin@linaro.org>
11
12description: |
13  This binding describes a reset controller device that is used to enable and
14  disable on-chip PicoPHY USB2 phy(s) using "softreset" control bits found in
15  the STi family SoC system configuration registers.
16
17  The actual action taken when softreset is asserted is hardware dependent.
18  However, when asserted it may not be possible to access the hardware's
19  registers and after an assert/deassert sequence the hardware's previous state
20  may no longer be valid.
21
22properties:
23  compatible:
24    const: st,stih407-picophyreset
25
26  '#reset-cells':
27    const: 1
28
29required:
30  - compatible
31  - '#reset-cells'
32
33additionalProperties: false
34
35examples:
36  - |
37    #include <dt-bindings/reset/stih407-resets.h>
38
39    picophyreset: picophyreset-controller {
40        compatible = "st,stih407-picophyreset";
41        #reset-cells = <1>;
42    };
43
44    // Specifying picophyreset control of devices
45    usb2_picophy0: usbpicophy {
46        resets = <&picophyreset STIH407_PICOPHY0_RESET>;
47    };
48