5 files changed, 259 insertions, 0 deletions
diff --git a/dts/Bindings/reset/fsl,imx-src.txt b/dts/Bindings/reset/fsl,imx-src.txt
new file mode 100644
index 0000000000..13301777e1
--- /dev/null
+++ b/dts/Bindings/reset/fsl,imx-src.txt
@@ -0,0 +1,49 @@
+Freescale i.MX System Reset Controller
+======================================
+
+Please also refer to reset.txt in this directory for common reset
+controller binding usage.
+
+Required properties:
+- compatible: Should be "fsl,<chip>-src"
+- reg: should be register base and length as documented in the
+  datasheet
+- interrupts: Should contain SRC interrupt and CPU WDOG interrupt,
+  in this order.
+- #reset-cells: 1, see below
+
+example:
+
+src: src@020d8000 {
+        compatible = "fsl,imx6q-src";
+        reg = <0x020d8000 0x4000>;
+        interrupts = <0 91 0x04 0 96 0x04>;
+        #reset-cells = <1>;
+};
+
+Specifying reset lines connected to IP modules
+==============================================
+
+The system reset controller can be used to reset the GPU, VPU,
+IPU, and OpenVG IP modules on i.MX5 and i.MX6 ICs. Those device
+nodes should specify the reset line on the SRC in their resets
+property, containing a phandle to the SRC device node and a
+RESET_INDEX specifying which module to reset, as described in
+reset.txt
+
+example:
+
+        ipu1: ipu@02400000 {
+                resets = <&src 2>;
+        };
+        ipu2: ipu@02800000 {
+                resets = <&src 4>;
+        };
+
+The following RESET_INDEX values are valid for i.MX5:
+GPU_RESET     0
+VPU_RESET     1
+IPU1_RESET    2
+OPEN_VG_RESET 3
+The following additional RESET_INDEX value is valid for i.MX6:
+IPU2_RESET    4
diff --git a/dts/Bindings/reset/reset.txt b/dts/Bindings/reset/reset.txt
new file mode 100644
index 0000000000..31db6ff849
--- /dev/null
+++ b/dts/Bindings/reset/reset.txt
@@ -0,0 +1,75 @@
+= Reset Signal Device Tree Bindings =
+
+This binding is intended to represent the hardware reset signals present
+internally in most IC (SoC, FPGA, ...) designs. Reset signals for whole
+standalone chips are most likely better represented as GPIOs, although there
+are likely to be exceptions to this rule.
+
+Hardware blocks typically receive a reset signal. This signal is generated by
+a reset provider (e.g. power management or clock module) and received by a
+reset consumer (the module being reset, or a module managing when a sub-
+ordinate module is reset). This binding exists to represent the provider and
+consumer, and provide a way to couple the two together.
+
+A reset signal is represented by the phandle of the provider, plus a reset
+specifier - a list of DT cells that represents the reset signal within the
+provider. The length (number of cells) and semantics of the reset specifier
+are dictated by the binding of the reset provider, although common schemes
+are described below.
+
+A word on where to place reset signal consumers in device tree: It is possible
+in hardware for a reset signal to affect multiple logically separate HW blocks
+at once. In this case, it would be unwise to represent this reset signal in
+the DT node of each affected HW block, since if activated, an unrelated block
+may be reset. Instead, reset signals should be represented in the DT node
+where it makes most sense to control it; this may be a bus node if all
+children of the bus are affected by the reset signal, or an individual HW
+block node for dedicated reset signals. The intent of this binding is to give
+appropriate software access to the reset signals in order to manage the HW,
+rather than to slavishly enumerate the reset signal that affects each HW
+block.
+
+= Reset providers =
+
+Required properties:
+#reset-cells:	Number of cells in a reset specifier; Typically 0 for nodes
+		with a single reset output and 1 for nodes with multiple
+		reset outputs.
+
+For example:
+
+	rst: reset-controller {
+		#reset-cells = <1>;
+	};
+
+= Reset consumers =
+
+Required properties:
+resets:		List of phandle and reset specifier pairs, one pair
+		for each reset signal that affects the device, or that the
+		device manages. Note: if the reset provider specifies '0' for
+		#reset-cells, then only the phandle portion of the pair will
+		appear.
+
+Optional properties:
+reset-names:	List of reset signal name strings sorted in the same order as
+		the resets property. Consumers drivers will use reset-names to
+		match reset signal names with reset specifiers.
+
+For example:
+
+	device {
+		resets = <&rst 20>;
+		reset-names = "reset";
+	};
+
+This represents a device with a single reset signal named "reset".
+
+	bus {
+		resets = <&rst 10> <&rst 11> <&rst 12> <&rst 11>;
+		reset-names = "i2s1", "i2s2", "dma", "mixer";
+	};
+
+This represents a bus that controls the reset signal of each of four sub-
+ordinate devices. Consider for example a bus that fails to operate unless no
+child device has reset asserted.
diff --git a/dts/Bindings/reset/sirf,rstc.txt b/dts/Bindings/reset/sirf,rstc.txt
new file mode 100644
index 0000000000..0505de742d
--- /dev/null
+++ b/dts/Bindings/reset/sirf,rstc.txt
@@ -0,0 +1,42 @@
+CSR SiRFSoC Reset Controller
+======================================
+
+Please also refer to reset.txt in this directory for common reset
+controller binding usage.
+
+Required properties:
+- compatible: Should be "sirf,prima2-rstc" or "sirf,marco-rstc"
+- reg: should be register base and length as documented in the
+  datasheet
+- #reset-cells: 1, see below
+
+example:
+
+rstc: reset-controller@88010000 {
+	compatible = "sirf,prima2-rstc";
+	reg = <0x88010000 0x1000>;
+	#reset-cells = <1>;
+};
+
+Specifying reset lines connected to IP modules
+==============================================
+
+The reset controller(rstc) manages various reset sources. This module provides
+reset signals for most blocks in system. Those device nodes should specify the
+reset line on the rstc in their resets property, containing a phandle to the
+rstc device node and a RESET_INDEX specifying which module to reset, as described
+in reset.txt.
+
+For SiRFSoC, RESET_INDEX is just reset_bit defined in SW_RST0 and SW_RST1 registers.
+For modules whose rest_bit is in SW_RST0, its RESET_INDEX is 0~31. For modules whose
+rest_bit is in SW_RST1, its RESET_INDEX is 32~63.
+
+example:
+
+vpp@90020000 {
+	compatible = "sirf,prima2-vpp";
+	reg = <0x90020000 0x10000>;
+	interrupts = <31>;
+	clocks = <&clks 35>;
+	resets = <&rstc 6>;
+};
diff --git a/dts/Bindings/reset/st,sti-powerdown.txt b/dts/Bindings/reset/st,sti-powerdown.txt
new file mode 100644
index 0000000000..5ab26b7e9d
--- /dev/null
+++ b/dts/Bindings/reset/st,sti-powerdown.txt
@@ -0,0 +1,47 @@
+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,<chip>-powerdown"
+	ex: "st,stih415-powerdown", "st,stih416-powerdown"
+- #reset-cells: 1, see below
+
+example:
+
+	powerdown: powerdown-controller {
+		#reset-cells = <1>;
+		compatible = "st,stih415-powerdown";
+	};
+
+
+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:
+
+	usb1: usb@fe200000 {
+		resets	= <&powerdown STIH41X_USB1_POWERDOWN>;
+	};
+
+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/dts/Bindings/reset/st,sti-softreset.txt b/dts/Bindings/reset/st,sti-softreset.txt
new file mode 100644
index 0000000000..a8d3d3c25c
--- /dev/null
+++ b/dts/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