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