From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- .../devicetree/bindings/reset/st,sti-powerdown.txt | 45 ++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/reset/st,sti-powerdown.txt (limited to 'Documentation/devicetree/bindings/reset/st,sti-powerdown.txt') diff --git a/Documentation/devicetree/bindings/reset/st,sti-powerdown.txt b/Documentation/devicetree/bindings/reset/st,sti-powerdown.txt new file mode 100644 index 000000000..92527138b --- /dev/null +++ b/Documentation/devicetree/bindings/reset/st,sti-powerdown.txt @@ -0,0 +1,45 @@ +STMicroelectronics STi family Sysconfig Peripheral Powerdown Reset Controller +============================================================================= + +This binding describes a reset controller device that is used to enable and +disable on-chip peripheral controllers such as USB and SATA, using +"powerdown" control bits found in the STi family SoC system configuration +registers. These have been grouped together into a single reset controller +device for convenience. + +The actual action taken when powerdown 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 reset.txt in this directory for common reset +controller binding usage. + +Required properties: +- compatible: Should be "st,stih407-powerdown" +- #reset-cells: 1, see below + +example: + + powerdown: powerdown-controller { + compatible = "st,stih407-powerdown"; + #reset-cells = <1>; + }; + + +Specifying powerdown control of devices +======================================= + +Device nodes should specify the reset channel required in their "resets" +property, containing a phandle to the powerdown device node and an +index specifying which channel to use, as described in reset.txt + +example: + + st_dwc3: dwc3@8f94000 { + resets = <&powerdown STIH407_USB3_POWERDOWN>, + }; + +Macro definitions for the supported reset channels can be found in: + +include/dt-bindings/reset/stih407-resets.h -- cgit v1.2.3