1 STMicroelectronics STi family Sysconfig Picophy SoftReset Controller
2 =============================================================================
4 This binding describes a reset controller device that is used to enable and
5 disable on-chip PicoPHY USB2 phy(s) using "softreset" control bits found in
6 the STi family SoC system configuration registers.
8 The actual action taken when softreset is asserted is hardware dependent.
9 However, when asserted it may not be possible to access the hardware's
10 registers and after an assert/deassert sequence the hardware's previous state
11 may no longer be valid.
13 Please refer to Documentation/devicetree/bindings/reset/reset.txt
14 for common reset controller binding usage.
17 - compatible: Should be "st,stih407-picophyreset"
18 - #reset-cells: 1, see below
22 picophyreset: picophyreset-controller {
23 compatible = "st,stih407-picophyreset";
27 Specifying picophyreset control of devices
28 =======================================
30 Device nodes should specify the reset channel required in their "resets"
31 property, containing a phandle to the picophyreset device node and an
32 index specifying which channel to use, as described in
33 Documentation/devicetree/bindings/reset/reset.txt.
37 usb2_picophy0: usbpicophy@0 {
38 resets = <&picophyreset STIH407_PICOPHY0_RESET>;
41 Macro definitions for the supported reset channels can be found in:
42 include/dt-bindings/reset/stih407-resets.h