1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/reset/st,stih407-powerdown.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: STMicroelectronics STi family Sysconfig Peripheral Powerdown Reset Controller 8 9maintainers: 10 - Srinivas Kandagatla <srinivas.kandagatla@st.com> 11 12description: | 13 This binding describes a reset controller device that is used to enable and 14 disable on-chip peripheral controllers such as USB and SATA, using 15 "powerdown" control bits found in the STi family SoC system configuration 16 registers. These have been grouped together into a single reset controller 17 device for convenience. 18 19 The actual action taken when powerdown is asserted is hardware dependent. 20 However, when asserted it may not be possible to access the hardware's 21 registers and after an assert/deassert sequence the hardware's previous state 22 may no longer be valid. 23 24properties: 25 compatible: 26 const: st,stih407-powerdown 27 28 '#reset-cells': 29 const: 1 30 31required: 32 - compatible 33 - '#reset-cells' 34 35additionalProperties: false 36 37examples: 38 - | 39 #include <dt-bindings/reset/stih407-resets.h> 40 41 powerdown: powerdown-controller { 42 compatible = "st,stih407-powerdown"; 43 #reset-cells = <1>; 44 }; 45 46 // Specifying powerdown control of devices: 47 st_dwc3: dwc3 { 48 resets = <&powerdown STIH407_USB3_POWERDOWN>; 49 }; 50