summaryrefslogtreecommitdiff
path: root/Documentation
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/arm/atmel-at91.txt3
-rw-r--r--Documentation/devicetree/bindings/arm/gemini.txt86
-rw-r--r--Documentation/devicetree/bindings/arm/i2se.txt22
-rw-r--r--Documentation/devicetree/bindings/arm/rockchip.txt7
-rw-r--r--Documentation/devicetree/bindings/arm/shmobile.txt4
-rw-r--r--Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-flowctrl.txt8
-rw-r--r--Documentation/devicetree/bindings/clock/mvebu-core-clock.txt7
-rw-r--r--Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt11
-rw-r--r--Documentation/devicetree/bindings/devfreq/exynos-bus.txt46
-rw-r--r--Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt2
-rw-r--r--Documentation/devicetree/bindings/gpu/arm,mali-utgard.txt8
-rw-r--r--Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt25
-rw-r--r--Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt1
-rw-r--r--Documentation/devicetree/bindings/net/marvell,prestera.txt13
-rw-r--r--Documentation/devicetree/bindings/usb/dwc2.txt4
-rw-r--r--Documentation/devicetree/bindings/watchdog/cortina,gemini-watchdog.txt17
16 files changed, 230 insertions, 34 deletions
diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index 29737b9b616e..799af90dd75b 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt
@@ -217,7 +217,8 @@ memory, bridge implementations, processor and other functionality not controlled
elsewhere.
required properties:
-- compatible: Should be "atmel,<chip>-sfr", "syscon".
+- compatible: Should be "atmel,<chip>-sfr", "syscon" or
+ "atmel,<chip>-sfrbu", "syscon"
<chip> can be "sama5d3", "sama5d4" or "sama5d2".
- reg: Should contain registers location and length
diff --git a/Documentation/devicetree/bindings/arm/gemini.txt b/Documentation/devicetree/bindings/arm/gemini.txt
new file mode 100644
index 000000000000..0041eb031116
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/gemini.txt
@@ -0,0 +1,86 @@
+Cortina systems Gemini platforms
+
+The Gemini SoC is the project name for an ARMv4 FA525-based SoC originally
+produced by Storlink Semiconductor around 2005. The company was renamed
+later renamed Storm Semiconductor. The chip product name is Storlink SL3516.
+It was derived from earlier products from Storm named SL3316 (Centroid) and
+SL3512 (Bulverde).
+
+Storm Semiconductor was acquired by Cortina Systems in 2008 and the SoC was
+produced and used for NAS and similar usecases. In 2014 Cortina Systems was
+in turn acquired by Inphi, who seem to have discontinued this product family.
+
+Many of the IP blocks used in the SoC comes from Faraday Technology.
+
+Required properties (in root node):
+ compatible = "cortina,gemini";
+
+Required nodes:
+
+- soc: the SoC should be represented by a simple bus encompassing all the
+ onchip devices, this is referred to as the soc bus node.
+
+- syscon: the soc bus node must have a system controller node pointing to the
+ global control registers, with the compatible string
+ "cortina,gemini-syscon", "syscon";
+
+- timer: the soc bus node must have a timer node pointing to the SoC timer
+ block, with the compatible string "cortina,gemini-timer"
+ See: clocksource/cortina,gemini-timer.txt
+
+- interrupt-controller: the sob bus node must have an interrupt controller
+ node pointing to the SoC interrupt controller block, with the compatible
+ string "cortina,gemini-interrupt-controller"
+ See interrupt-controller/cortina,gemini-interrupt-controller.txt
+
+Example:
+
+/ {
+ model = "Foo Gemini Machine";
+ compatible = "cortina,gemini";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ memory {
+ device_type = "memory";
+ reg = <0x00000000 0x8000000>;
+ };
+
+ soc {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+ compatible = "simple-bus";
+ interrupt-parent = <&intcon>;
+
+ syscon: syscon@40000000 {
+ compatible = "cortina,gemini-syscon", "syscon";
+ reg = <0x40000000 0x1000>;
+ };
+
+ uart0: serial@42000000 {
+ compatible = "ns16550a";
+ reg = <0x42000000 0x100>;
+ clock-frequency = <48000000>;
+ interrupts = <18 IRQ_TYPE_LEVEL_HIGH>;
+ reg-shift = <2>;
+ };
+
+ timer@43000000 {
+ compatible = "cortina,gemini-timer";
+ reg = <0x43000000 0x1000>;
+ interrupt-parent = <&intcon>;
+ interrupts = <14 IRQ_TYPE_EDGE_FALLING>, /* Timer 1 */
+ <15 IRQ_TYPE_EDGE_FALLING>, /* Timer 2 */
+ <16 IRQ_TYPE_EDGE_FALLING>; /* Timer 3 */
+ syscon = <&syscon>;
+ };
+
+ intcon: interrupt-controller@48000000 {
+ compatible = "cortina,gemini-interrupt-controller";
+ reg = <0x48000000 0x1000>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+ };
+};
diff --git a/Documentation/devicetree/bindings/arm/i2se.txt b/Documentation/devicetree/bindings/arm/i2se.txt
new file mode 100644
index 000000000000..dbd54a3aa07d
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/i2se.txt
@@ -0,0 +1,22 @@
+I2SE Device Tree Bindings
+-------------------------
+
+Duckbill Board
+Required root node properties:
+ - compatible = "i2se,duckbill", "fsl,imx28";
+
+Duckbill 2 Board
+Required root node properties:
+ - compatible = "i2se,duckbill-2", "fsl,imx28";
+
+Duckbill 2 485 Board
+Required root node properties:
+ - compatible = "i2se,duckbill-2-485", "i2se,duckbill-2", "fsl,imx28";
+
+Duckbill 2 EnOcean Board
+Required root node properties:
+ - compatible = "i2se,duckbill-2-enocean", "i2se,duckbill-2", "fsl,imx28";
+
+Duckbill 2 SPI Board
+Required root node properties:
+ - compatible = "i2se,duckbill-2-spi", "i2se,duckbill-2", "fsl,imx28";
diff --git a/Documentation/devicetree/bindings/arm/rockchip.txt b/Documentation/devicetree/bindings/arm/rockchip.txt
index cc4ace6397ab..6b8d50a0ee78 100644
--- a/Documentation/devicetree/bindings/arm/rockchip.txt
+++ b/Documentation/devicetree/bindings/arm/rockchip.txt
@@ -1,5 +1,8 @@
Rockchip platforms device tree bindings
---------------------------------------
+- Asus Tinker board
+ Required root node properties:
+ - compatible = "asus,rk3288-tinker", "rockchip,rk3288";
- Kylin RK3036 board:
Required root node properties:
@@ -103,6 +106,10 @@ Rockchip platforms device tree bindings
Required root node properties:
- compatible = "mqmaker,miqi", "rockchip,rk3288";
+- Phytec phyCORE-RK3288: Rapid Development Kit
+ Required root node properties:
+ - compatible = "phytec,rk3288-pcm-947", "phytec,rk3288-phycore-som", "rockchip,rk3288";
+
- Rockchip PX3 Evaluation board:
Required root node properties:
- compatible = "rockchip,px3-evb", "rockchip,px3", "rockchip,rk3188";
diff --git a/Documentation/devicetree/bindings/arm/shmobile.txt b/Documentation/devicetree/bindings/arm/shmobile.txt
index c9502634316d..170fe0562c63 100644
--- a/Documentation/devicetree/bindings/arm/shmobile.txt
+++ b/Documentation/devicetree/bindings/arm/shmobile.txt
@@ -13,8 +13,12 @@ SoCs:
compatible = "renesas,r8a73a4"
- R-Mobile A1 (R8A77400)
compatible = "renesas,r8a7740"
+ - RZ/G1H (R8A77420)
+ compatible = "renesas,r8a7742"
- RZ/G1M (R8A77430)
compatible = "renesas,r8a7743"
+ - RZ/G1N (R8A77440)
+ compatible = "renesas,r8a7744"
- RZ/G1E (R8A77450)
compatible = "renesas,r8a7745"
- R-Car M1A (R8A77781)
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-flowctrl.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-flowctrl.txt
index ccf0adddc820..a855c1bffc0f 100644
--- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-flowctrl.txt
+++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-flowctrl.txt
@@ -1,7 +1,13 @@
NVIDIA Tegra Flow Controller
Required properties:
-- compatible: Should be "nvidia,tegra<chip>-flowctrl"
+- compatible: Should contain one of the following:
+ - "nvidia,tegra20-flowctrl": for Tegra20
+ - "nvidia,tegra30-flowctrl": for Tegra30
+ - "nvidia,tegra114-flowctrl": for Tegra114
+ - "nvidia,tegra124-flowctrl": for Tegra124
+ - "nvidia,tegra132-flowctrl", "nvidia,tegra124-flowctrl": for Tegra132
+ - "nvidia,tegra210-flowctrl": for Tegra210
- reg: Should contain one register range (address and length)
Example:
diff --git a/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt
index eb985a633d59..796c260c183d 100644
--- a/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt
+++ b/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt
@@ -31,6 +31,12 @@ The following is a list of provided IDs and clock names on Armada 39x:
4 = dclk (SDRAM Interface Clock)
5 = refclk (Reference Clock)
+The following is a list of provided IDs and clock names on 98dx3236:
+ 0 = tclk (Internal Bus clock)
+ 1 = cpuclk (CPU clock)
+ 2 = ddrclk (DDR clock)
+ 3 = mpll (MPLL Clock)
+
The following is a list of provided IDs and clock names on Kirkwood and Dove:
0 = tclk (Internal Bus clock)
1 = cpuclk (CPU0 clock)
@@ -49,6 +55,7 @@ Required properties:
"marvell,armada-380-core-clock" - For Armada 380/385 SoC core clocks
"marvell,armada-390-core-clock" - For Armada 39x SoC core clocks
"marvell,armada-xp-core-clock" - For Armada XP SoC core clocks
+ "marvell,mv98dx3236-core-clock" - For 98dx3236 family SoC core clocks
"marvell,dove-core-clock" - for Dove SoC core clocks
"marvell,kirkwood-core-clock" - for Kirkwood SoC (except mv88f6180)
"marvell,mv88f6180-core-clock" - for Kirkwood MV88f6180 SoC
diff --git a/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt
index 5142efc8099d..de562da2ae77 100644
--- a/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt
+++ b/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt
@@ -119,6 +119,16 @@ ID Clock Peripheral
29 sata1lnk
30 sata1 SATA Host 1
+The following is a list of provided IDs for 98dx3236:
+ID Clock Peripheral
+-----------------------------------
+3 ge1 Gigabit Ethernet 1
+4 ge0 Gigabit Ethernet 0
+5 pex0 PCIe Cntrl 0
+17 sdio SDHCI Host
+18 usb0 USB Host 0
+22 xor0 XOR DMA 0
+
The following is a list of provided IDs for Dove:
ID Clock Peripheral
-----------------------------------
@@ -169,6 +179,7 @@ Required properties:
"marvell,armada-380-gating-clock" - for Armada 380/385 SoC clock gating
"marvell,armada-390-gating-clock" - for Armada 39x SoC clock gating
"marvell,armada-xp-gating-clock" - for Armada XP SoC clock gating
+ "marvell,mv98dx3236-gating-clock" - for 98dx3236 SoC clock gating
"marvell,dove-gating-clock" - for Dove SoC clock gating
"marvell,kirkwood-gating-clock" - for Kirkwood SoC clock gating
- reg : shall be the register address of the Clock Gating Control register
diff --git a/Documentation/devicetree/bindings/devfreq/exynos-bus.txt b/Documentation/devicetree/bindings/devfreq/exynos-bus.txt
index d085ef90d27c..f8e946471a58 100644
--- a/Documentation/devicetree/bindings/devfreq/exynos-bus.txt
+++ b/Documentation/devicetree/bindings/devfreq/exynos-bus.txt
@@ -202,23 +202,23 @@ Example2 :
compatible = "operating-points-v2";
opp-shared;
- opp@50000000 {
+ opp-50000000 {
opp-hz = /bits/ 64 <50000000>;
opp-microvolt = <800000>;
};
- opp@100000000 {
+ opp-100000000 {
opp-hz = /bits/ 64 <100000000>;
opp-microvolt = <800000>;
};
- opp@134000000 {
+ opp-134000000 {
opp-hz = /bits/ 64 <134000000>;
opp-microvolt = <800000>;
};
- opp@200000000 {
+ opp-200000000 {
opp-hz = /bits/ 64 <200000000>;
opp-microvolt = <825000>;
};
- opp@400000000 {
+ opp-400000000 {
opp-hz = /bits/ 64 <400000000>;
opp-microvolt = <875000>;
};
@@ -292,23 +292,23 @@ Example2 :
compatible = "operating-points-v2";
opp-shared;
- opp@50000000 {
+ opp-50000000 {
opp-hz = /bits/ 64 <50000000>;
opp-microvolt = <900000>;
};
- opp@80000000 {
+ opp-80000000 {
opp-hz = /bits/ 64 <80000000>;
opp-microvolt = <900000>;
};
- opp@100000000 {
+ opp-100000000 {
opp-hz = /bits/ 64 <100000000>;
opp-microvolt = <1000000>;
};
- opp@134000000 {
+ opp-134000000 {
opp-hz = /bits/ 64 <134000000>;
opp-microvolt = <1000000>;
};
- opp@200000000 {
+ opp-200000000 {
opp-hz = /bits/ 64 <200000000>;
opp-microvolt = <1000000>;
};
@@ -318,19 +318,19 @@ Example2 :
compatible = "operating-points-v2";
opp-shared;
- opp@50000000 {
+ opp-50000000 {
opp-hz = /bits/ 64 <50000000>;
};
- opp@80000000 {
+ opp-80000000 {
opp-hz = /bits/ 64 <80000000>;
};
- opp@100000000 {
+ opp-100000000 {
opp-hz = /bits/ 64 <100000000>;
};
- opp@200000000 {
+ opp-200000000 {
opp-hz = /bits/ 64 <200000000>;
};
- opp@400000000 {
+ opp-400000000 {
opp-hz = /bits/ 64 <400000000>;
};
};
@@ -339,19 +339,19 @@ Example2 :
compatible = "operating-points-v2";
opp-shared;
- opp@50000000 {
+ opp-50000000 {
opp-hz = /bits/ 64 <50000000>;
};
- opp@80000000 {
+ opp-80000000 {
opp-hz = /bits/ 64 <80000000>;
};
- opp@100000000 {
+ opp-100000000 {
opp-hz = /bits/ 64 <100000000>;
};
- opp@200000000 {
+ opp-200000000 {
opp-hz = /bits/ 64 <200000000>;
};
- opp@300000000 {
+ opp-300000000 {
opp-hz = /bits/ 64 <300000000>;
};
};
@@ -360,13 +360,13 @@ Example2 :
compatible = "operating-points-v2";
opp-shared;
- opp@50000000 {
+ opp-50000000 {
opp-hz = /bits/ 64 <50000000>;
};
- opp@80000000 {
+ opp-80000000 {
opp-hz = /bits/ 64 <80000000>;
};
- opp@100000000 {
+ opp-100000000 {
opp-hz = /bits/ 64 <100000000>;
};
};
diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
index b82c00449468..57a8d0610062 100644
--- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
+++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
@@ -94,6 +94,7 @@ Required properties:
* allwinner,sun6i-a31-display-backend
* allwinner,sun8i-a33-display-backend
- reg: base address and size of the memory-mapped region.
+ - interrupts: interrupt associated to this IP
- clocks: phandles to the clocks feeding the frontend and backend
* ahb: the backend interface clock
* mod: the backend module clock
@@ -265,6 +266,7 @@ fe0: display-frontend@1e00000 {
be0: display-backend@1e60000 {
compatible = "allwinner,sun5i-a13-display-backend";
reg = <0x01e60000 0x10000>;
+ interrupts = <47>;
clocks = <&ahb_gates 44>, <&de_be_clk>,
<&dram_gates 26>;
clock-names = "ahb", "mod",
diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-utgard.txt b/Documentation/devicetree/bindings/gpu/arm,mali-utgard.txt
index 476f5ea6c627..2b6243e730f6 100644
--- a/Documentation/devicetree/bindings/gpu/arm,mali-utgard.txt
+++ b/Documentation/devicetree/bindings/gpu/arm,mali-utgard.txt
@@ -35,6 +35,14 @@ Optional properties:
- interrupt-names and interrupts:
* pmu: Power Management Unit interrupt, if implemented in hardware
+ - memory-region:
+ Memory region to allocate from, as defined in
+ Documentation/devicetree/bindi/reserved-memory/reserved-memory.txt
+
+ - operating-points-v2:
+ Operating Points for the GPU, as defined in
+ Documentation/devicetree/bindings/opp/opp.txt
+
Vendor-specific bindings
------------------------
diff --git a/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt b/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
index ff3db65e50de..b7e4c7444510 100644
--- a/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
+++ b/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
@@ -5,6 +5,7 @@ Required properties:
Currently recognized values:
- nvidia,gk20a
- nvidia,gm20b
+ - nvidia,gp10b
- reg: Physical base address and length of the controller's registers.
Must contain two entries:
- first entry for bar0
@@ -14,7 +15,8 @@ Required properties:
- interrupt-names: Must include the following entries:
- stall
- nonstall
-- vdd-supply: regulator for supply voltage.
+- vdd-supply: regulator for supply voltage. Only required for GPUs not using
+ power domains.
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names: Must include the following entries:
@@ -27,6 +29,8 @@ is also required:
See ../reset/reset.txt for details.
- reset-names: Must include the following entries:
- gpu
+- power-domains: GPUs that make use of power domains can define this property
+ instead of vdd-supply. Currently "nvidia,gp10b" makes use of this.
Optional properties:
- iommus: A reference to the IOMMU. See ../iommu/iommu.txt for details.
@@ -68,3 +72,22 @@ Example for GM20B:
iommus = <&mc TEGRA_SWGROUP_GPU>;
status = "disabled";
};
+
+Example for GP10B:
+
+ gpu@17000000 {
+ compatible = "nvidia,gp10b";
+ reg = <0x0 0x17000000 0x0 0x1000000>,
+ <0x0 0x18000000 0x0 0x1000000>;
+ interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH
+ GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "stall", "nonstall";
+ clocks = <&bpmp TEGRA186_CLK_GPCCLK>,
+ <&bpmp TEGRA186_CLK_GPU>;
+ clock-names = "gpu", "pwr";
+ resets = <&bpmp TEGRA186_RESET_GPU>;
+ reset-names = "gpu";
+ power-domains = <&bpmp TEGRA186_POWER_DOMAIN_GPU>;
+ iommus = <&smmu TEGRA186_SID_GPU>;
+ status = "disabled";
+ };
diff --git a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt
index 3e920ec5c4d3..9ce35af8507c 100644
--- a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt
+++ b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt
@@ -40,6 +40,7 @@ Required properties:
w25x80
w25x32
w25q32
+ w25q64
w25q32dw
w25q80bl
w25q128
diff --git a/Documentation/devicetree/bindings/net/marvell,prestera.txt b/Documentation/devicetree/bindings/net/marvell,prestera.txt
index 5fbab29718e8..c329608fa887 100644
--- a/Documentation/devicetree/bindings/net/marvell,prestera.txt
+++ b/Documentation/devicetree/bindings/net/marvell,prestera.txt
@@ -32,19 +32,16 @@ DFX Server bindings
-------------------
Required properties:
-- compatible: must be "marvell,dfx-server"
+- compatible: must be "marvell,dfx-server", "simple-bus"
+- ranges: describes the address mapping of a memory-mapped bus.
- reg: address and length of the register set for the device.
Example:
-dfx-registers {
- compatible = "simple-bus";
+dfx-server {
+ compatible = "marvell,dfx-server", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0 MBUS_ID(0x08, 0x00) 0 0x100000>;
-
- dfx: dfx@0 {
- compatible = "marvell,dfx-server";
- reg = <0 0x100000>;
- };
+ reg = <MBUS_ID(0x08, 0x00) 0 0x100000>;
};
diff --git a/Documentation/devicetree/bindings/usb/dwc2.txt b/Documentation/devicetree/bindings/usb/dwc2.txt
index 6c7c2bce6d0c..00bea038639e 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.txt
+++ b/Documentation/devicetree/bindings/usb/dwc2.txt
@@ -14,6 +14,10 @@ Required properties:
- "amlogic,meson-gxbb-usb": The DWC2 USB controller instance in Amlogic S905 SoCs;
- "amcc,dwc-otg": The DWC2 USB controller instance in AMCC Canyonlands 460EX SoCs;
- snps,dwc2: A generic DWC2 USB controller with default parameters.
+ - "st,stm32f4x9-fsotg": The DWC2 USB FS/HS controller instance in STM32F4x9 SoCs
+ configured in FS mode;
+ - "st,stm32f4x9-hsotg": The DWC2 USB HS controller instance in STM32F4x9 SoCs
+ configured in HS mode;
- reg : Should contain 1 register range (address and length)
- interrupts : Should contain 1 interrupt
- clocks: clock provider specifier
diff --git a/Documentation/devicetree/bindings/watchdog/cortina,gemini-watchdog.txt b/Documentation/devicetree/bindings/watchdog/cortina,gemini-watchdog.txt
new file mode 100644
index 000000000000..bc4b865d178b
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/cortina,gemini-watchdog.txt
@@ -0,0 +1,17 @@
+Cortina Systems Gemini SoC Watchdog
+
+Required properties:
+- compatible : must be "cortina,gemini-watchdog"
+- reg : shall contain base register location and length
+- interrupts : shall contain the interrupt for the watchdog
+
+Optional properties:
+- timeout-sec : the default watchdog timeout in seconds.
+
+Example:
+
+watchdog@41000000 {
+ compatible = "cortina,gemini-watchdog";
+ reg = <0x41000000 0x1000>;
+ interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
+};