From fc58fcf6da7377eeac217b3b187bb004c9564467 Mon Sep 17 00:00:00 2001 From: Srinivas Kandagatla Date: Tue, 11 Mar 2014 09:32:49 +0000 Subject: ARM: STi: STiH415: Add soft reset controller support. This patch adds soft reset controller support for STiH415 and adds new softreset lines required for other device tree nodes in the header file. Signed-off-by: Srinivas Kandagatla --- .../devicetree/bindings/reset/st,sti-softreset.txt | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/reset/st,sti-softreset.txt (limited to 'Documentation/devicetree/bindings') 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,-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 -- cgit v1.2.3-59-g8ed1b