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- STMicroelectronics STi family Sysconfig Picophy SoftReset Controller
- =============================================================================
- This binding describes a reset controller device that is used to enable and
- disable on-chip PicoPHY USB2 phy(s) using "softreset" control bits found in
- the STi family SoC system configuration registers.
- The actual action taken when softreset is asserted is hardware dependent.
- However, when asserted it may not be possible to access the hardware's
- registers and after an assert/deassert sequence the hardware's previous state
- may no longer be valid.
- Please refer to Documentation/devicetree/bindings/reset/reset.txt
- for common reset controller binding usage.
- Required properties:
- - compatible: Should be "st,stih407-picophyreset"
- - #reset-cells: 1, see below
- Example:
- picophyreset: picophyreset-controller {
- compatible = "st,stih407-picophyreset";
- #reset-cells = <1>;
- };
- Specifying picophyreset control of devices
- =======================================
- Device nodes should specify the reset channel required in their "resets"
- property, containing a phandle to the picophyreset device node and an
- index specifying which channel to use, as described in
- Documentation/devicetree/bindings/reset/reset.txt.
- Example:
- usb2_picophy0: usbpicophy@0 {
- resets = <&picophyreset STIH407_PICOPHY0_RESET>;
- };
- Macro definitions for the supported reset channels can be found in:
- include/dt-bindings/reset/stih407-resets.h
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