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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt')
-rw-r--r-- | Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt b/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt new file mode 100644 index 000000000..9ca27761f --- /dev/null +++ b/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt @@ -0,0 +1,42 @@ +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 |