Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fc58fcf6 authored by Srinivas Kandagatla's avatar Srinivas Kandagatla
Browse files

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: default avatarSrinivas Kandagatla <srinivas.kandagatla@st.com>
parent 6b7f06cc

Documentation/devicetree/bindings/reset/st,sti-softreset.txt

0 → 100644
+46 −0
Original line number Diff line number Diff line 
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

arch/arm/boot/dts/stih415.dtsi

+5 −0
Original line number Diff line number Diff line
@@ -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>;

include/dt-bindings/reset-controller/stih415-resets.h

+7 −0
Original line number Diff line number Diff line
@@ -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 */