diff options
| -rw-r--r-- | Documentation/devicetree/bindings/reset/st,sti-softreset.txt | 46 | ||||
| -rw-r--r-- | arch/arm/boot/dts/stih415.dtsi | 5 | ||||
| -rw-r--r-- | include/dt-bindings/reset-controller/stih415-resets.h | 7 |
3 files changed, 58 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 diff --git a/arch/arm/boot/dts/stih415.dtsi b/arch/arm/boot/dts/stih415.dtsi index 19e29f4af9d6..d52207c1168e 100644 --- a/arch/arm/boot/dts/stih415.dtsi +++ b/arch/arm/boot/dts/stih415.dtsi @@ -34,6 +34,11 @@ compatible = "st,stih415-powerdown"; }; + softreset: softreset-controller { + #reset-cells = <1>; + compatible = "st,stih415-softreset"; + }; + syscfg_sbc: sbc-syscfg@fe600000{ compatible = "st,stih415-sbc-syscfg", "syscon"; reg = <0xfe600000 0xb4>; diff --git a/include/dt-bindings/reset-controller/stih415-resets.h b/include/dt-bindings/reset-controller/stih415-resets.h index 2d54e68c2d95..c2f8a66913c5 100644 --- a/include/dt-bindings/reset-controller/stih415-resets.h +++ b/include/dt-bindings/reset-controller/stih415-resets.h @@ -16,4 +16,11 @@ #define STIH415_SATA1_POWERDOWN 7 #define STIH415_PCIE_POWERDOWN 8 +#define STIH415_ETH0_SOFTRESET 0 +#define STIH415_ETH1_SOFTRESET 1 +#define STIH415_IRB_SOFTRESET 2 +#define STIH415_USB0_SOFTRESET 3 +#define STIH415_USB1_SOFTRESET 4 +#define STIH415_USB2_SOFTRESET 5 + #endif /* _DT_BINDINGS_RESET_CONTROLLER_STIH415 */ |