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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/reset/st,sti-softreset.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/reset/st,sti-softreset.txt b/Documentation/devicetree/bindings/reset/st,sti-softreset.txt new file mode 100644 index 000000000000..a8d3d3c25ca2 --- /dev/null +++ b/Documentation/devicetree/bindings/reset/st,sti-softreset.txt @@ -0,0 +1,46 @@ +STMicroelectronics STi family Sysconfig Peripheral SoftReset 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 +"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 reset.txt in this directory for common reset +controller binding usage. + +Required properties: +- compatible: Should be "st,<chip>-softreset" example: + "st,stih415-softreset" or "st,stih416-softreset"; +- #reset-cells: 1, see below + +example: + + softreset: softreset-controller { + #reset-cells = <1>; + compatible = "st,stih415-softreset"; + }; + + +Specifying softreset control of devices +======================================= + +Device nodes should specify the reset channel required in their "resets" +property, containing a phandle to the softreset device node and an +index specifying which channel to use, as described in reset.txt + +example: + + ethernet0{ + resets = <&softreset STIH415_ETH0_SOFTRESET>; + }; + +Macro definitions for the supported reset channels can be found in: + +include/dt-bindings/reset-controller/stih415-resets.h +include/dt-bindings/reset-controller/stih416-resets.h |