Merge tag 'arc-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC updates from Vineet Gupta:
 "We have a relatively big changeset for ARC for 4.7.

  The highlight is support for EZChip (now Mellanox) NPS-400 network
  processor, a 400-Gb throughput C-programmable packet processor based
  on ARC700 cores from Synopsys. See

        http://www.mellanox.com/related-docs/prod_npu/PB_NPS-400.pdf

  Also present are irqchip and clocksource drivers for NPS as agreed
  with respective maintainers to go via ARC tree due to an soc header
  dependency.  I have the needed ACKs from Jason, Marc, Daniel.  You
  might run into a trivial merge conflict in drivers/irqchip/*

  This EZChip platform support required some deep changes in ARC
  architecture code and also opportunity to cleanup past sins (legacy
  irq domains, missing irq domain lookup, hard coded timer irqs...)

  Summary:

   - Support for EZChip (now Mellanox) NPS-400 Network processor based
     on ARC700

   - NPS interrupt controller and clocksource drivers

   - ARC timers probed off DT

   - ARC iqrchips switching to linear domain (upgrade from legacy
     domains)"

* tag 'arc-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (37 commits)
  arc: axs103_smp: Fix CPU frequency to 100MHz for dual-core
  arc: axs10x: Add DT bindings for I2S PLL Clock
  ARC: pae: STRICT_MM_TYPECHECKS was broken
  ARC: Add eznps platform to Kconfig and Makefile
  ARC: [plat-eznps] Use dedicated COMMAND_LINE_SIZE
  ARC: [plat-eznps] Use dedicated cpu_relax()
  ARC: [plat-eznps] Use dedicated identity auxiliary register.
  ARC: [plat-eznps] Use dedicated SMP barriers
  ARC: [plat-eznps] Use dedicated atomic/bitops/cmpxchg
  ARC: [plat-eznps] Use dedicated user stack top
  ARC: [plat-eznps] Add eznps platform
  ARC: [plat-eznps] Add eznps board defconfig and dts
  ARC: Mark secondary cpu online only after all HW setup is done
  ARC: rwlock: disable interrupts in !LLSC variant
  ARC: Make vmalloc size configurable
  ARC: clean out UAPI byteorder.h clean off Kconfig symbol
  irqchip: add nps Internal and external irqchips
  clocksource: Add NPS400 timers driver
  soc: Support for EZchip SoC
  Documentation: Add EZchip vendor to binding list
  ...

55 files changed, 1782 insertions, 284 deletions

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index a8767430df7d..8894f7e7e3de 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -10,8 +10,9 @@ config ARC
 	def_bool y
 	select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
 	select BUILDTIME_EXTABLE_SORT
-	select COMMON_CLK
+	select CLKSRC_OF
 	select CLONE_BACKWARDS
+	select COMMON_CLK
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_FIND_FIRST_BIT
@@ -30,6 +31,7 @@ config ARC
 	select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND
 	select HAVE_OPROFILE
 	select HAVE_PERF_EVENTS
+	select HANDLE_DOMAIN_IRQ
 	select IRQ_DOMAIN
 	select MODULES_USE_ELF_RELA
 	select NO_BOOTMEM
@@ -95,6 +97,7 @@ source "arch/arc/plat-sim/Kconfig"
 source "arch/arc/plat-tb10x/Kconfig"
 source "arch/arc/plat-axs10x/Kconfig"
 #New platform adds here
+source "arch/arc/plat-eznps/Kconfig"
 
 endmenu
 
@@ -490,6 +493,17 @@ config ARCH_DMA_ADDR_T_64BIT
 config ARC_PLAT_NEEDS_PHYS_TO_DMA
 	bool
 
+config ARC_KVADDR_SIZE
+	int "Kernel Virtaul Address Space size (MB)"
+	range 0 512
+	default "256"
+	help
+	  The kernel address space is carved out of 256MB of translated address
+	  space for catering to vmalloc, modules, pkmap, fixmap. This however may
+	  not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
+	  this to be stretched to 512 MB (by extending into the reserved
+	  kernel-user gutter)
+
 config ARC_CURR_IN_REG
 	bool "Dedicate Register r25 for current_task pointer"
 	default y
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index def69e347b2d..02fabef2891c 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -115,6 +115,11 @@ core-y		+= arch/arc/boot/dts/
 core-$(CONFIG_ARC_PLAT_SIM)	+= arch/arc/plat-sim/
 core-$(CONFIG_ARC_PLAT_TB10X)	+= arch/arc/plat-tb10x/
 core-$(CONFIG_ARC_PLAT_AXS10X)	+= arch/arc/plat-axs10x/
+core-$(CONFIG_ARC_PLAT_EZNPS)	+= arch/arc/plat-eznps/
+
+ifdef CONFIG_ARC_PLAT_EZNPS
+KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
+endif
 
 drivers-$(CONFIG_OPROFILE)	+= arch/arc/oprofile/
 
diff --git a/arch/arc/boot/dts/abilis_tb10x.dtsi b/arch/arc/boot/dts/abilis_tb10x.dtsi
index cfb5052239a1..663671f22680 100644
--- a/arch/arc/boot/dts/abilis_tb10x.dtsi
+++ b/arch/arc/boot/dts/abilis_tb10x.dtsi
@@ -35,6 +35,20 @@
 		};
 	};
 
+	/* TIMER0 with interrupt for clockevent */
+	timer0 {
+		compatible = "snps,arc-timer";
+		interrupts = <3>;
+		interrupt-parent = <&intc>;
+		clocks = <&cpu_clk>;
+	};
+
+	/* TIMER1 for free running clocksource */
+	timer1 {
+		compatible = "snps,arc-timer";
+		clocks = <&cpu_clk>;
+	};
+
 	soc100 {
 		#address-cells	= <1>;
 		#size-cells	= <1>;
diff --git a/arch/arc/boot/dts/axc001.dtsi b/arch/arc/boot/dts/axc001.dtsi
index 420dcfde289f..40bcecfc3687 100644
--- a/arch/arc/boot/dts/axc001.dtsi
+++ b/arch/arc/boot/dts/axc001.dtsi
@@ -11,6 +11,8 @@
  * Note that this file only supports the 770D CPU
  */
 
+/include/ "skeleton.dtsi"
+
 / {
 	compatible = "snps,arc";
 	clock-frequency = <750000000>;	/* 750 MHZ */
@@ -24,7 +26,13 @@
 
 		ranges = <0x00000000 0xf0000000 0x10000000>;
 
-		cpu_intc: arc700-intc@cpu {
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <750000000>;
+		};
+
+		core_intc: arc700-intc@cpu {
 			compatible = "snps,arc700-intc";
 			interrupt-controller;
 			#interrupt-cells = <1>;
@@ -48,7 +56,7 @@
 				reg = <0>;
 				interrupt-controller;
 				#interrupt-cells = <2>;
-				interrupt-parent = <&cpu_intc>;
+				interrupt-parent = <&core_intc>;
 				interrupts = <15>;
 			};
 		};
@@ -86,7 +94,7 @@
 		compatible = "snps,dw-apb-ictl";
 		reg = < 0xe0012000 0x200 >;
 		interrupt-controller;
-		interrupt-parent = <&cpu_intc>;
+		interrupt-parent = <&core_intc>;
 		interrupts = < 7 >;
 	};
 
diff --git a/arch/arc/boot/dts/axc003.dtsi b/arch/arc/boot/dts/axc003.dtsi
index f90fadf7f94e..cabe0deeb2d8 100644
--- a/arch/arc/boot/dts/axc003.dtsi
+++ b/arch/arc/boot/dts/axc003.dtsi
@@ -10,6 +10,8 @@
  * Device tree for AXC003 CPU card: HS38x UP configuration
  */
 
+/include/ "skeleton_hs.dtsi"
+
 / {
 	compatible = "snps,arc";
 	clock-frequency = <90000000>;
@@ -23,7 +25,13 @@
 
 		ranges = <0x00000000 0xf0000000 0x10000000>;
 
-		cpu_intc: archs-intc@cpu {
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <90000000>;
+		};
+
+		core_intc: archs-intc@cpu {
 			compatible = "snps,archs-intc";
 			interrupt-controller;
 			#interrupt-cells = <1>;
@@ -47,7 +55,7 @@
 				reg = <0>;
 				interrupt-controller;
 				#interrupt-cells = <2>;
-				interrupt-parent = <&cpu_intc>;
+				interrupt-parent = <&core_intc>;
 				interrupts = <25>;
 			};
 		};
@@ -66,7 +74,7 @@
 		arcpct0: pct {
 			compatible = "snps,archs-pct";
 			#interrupt-cells = <1>;
-			interrupt-parent = <&cpu_intc>;
+			interrupt-parent = <&core_intc>;
 			interrupts = <20>;
 		};
 	};
@@ -89,7 +97,7 @@
 		compatible = "snps,dw-apb-ictl";
 		reg = < 0xe0012000 0x200 >;
 		interrupt-controller;
-		interrupt-parent = <&cpu_intc>;
+		interrupt-parent = <&core_intc>;
 		interrupts = < 24 >;
 	};
 
diff --git a/arch/arc/boot/dts/axc003_idu.dtsi b/arch/arc/boot/dts/axc003_idu.dtsi
index 06a9f294a2e6..ed1674b16e82 100644
--- a/arch/arc/boot/dts/axc003_idu.dtsi
+++ b/arch/arc/boot/dts/axc003_idu.dtsi
@@ -10,6 +10,8 @@
  * Device tree for AXC003 CPU card: HS38x2 (Dual Core) with IDU intc
  */
 
+/include/ "skeleton_hs_idu.dtsi"
+
 / {
 	compatible = "snps,arc";
 	clock-frequency = <90000000>;
@@ -23,7 +25,13 @@
 
 		ranges = <0x00000000 0xf0000000 0x10000000>;
 
-		cpu_intc: archs-intc@cpu {
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <100000000>;
+		};
+
+		core_intc: archs-intc@cpu {
 			compatible = "snps,archs-intc";
 			interrupt-controller;
 			#interrupt-cells = <1>;
@@ -32,7 +40,7 @@
 		idu_intc: idu-interrupt-controller {
 			compatible = "snps,archs-idu-intc";
 			interrupt-controller;
-			interrupt-parent = <&cpu_intc>;
+			interrupt-parent = <&core_intc>;
 
 			/*
 			 * <hwirq  distribution>
@@ -89,7 +97,7 @@
 		arcpct0: pct {
 			compatible = "snps,archs-pct";
 			#interrupt-cells = <1>;
-			interrupt-parent = <&cpu_intc>;
+			interrupt-parent = <&core_intc>;
 			interrupts = <20>;
 		};
 	};
diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi
index 44a578c10732..68c84a2fc1e4 100644
--- a/arch/arc/boot/dts/axs10x_mb.dtsi
+++ b/arch/arc/boot/dts/axs10x_mb.dtsi
@@ -16,7 +16,20 @@
 		ranges = <0x00000000 0xe0000000 0x10000000>;
 		interrupt-parent = <&mb_intc>;
 
+		i2sclk: i2sclk@100a0 {
+			compatible = "snps,axs10x-i2s-pll-clock";
+			reg = <0x100a0 0x10>;
+			clocks = <&i2spll_clk>;
+			#clock-cells = <0>;
+		};
+
 		clocks {
+			i2spll_clk: i2spll_clk {
+				compatible = "fixed-clock";
+				clock-frequency = <27000000>;
+				#clock-cells = <0>;
+			};
+
 			i2cclk: i2cclk {
 				compatible = "fixed-clock";
 				clock-frequency = <50000000>;
diff --git a/arch/arc/boot/dts/eznps.dts b/arch/arc/boot/dts/eznps.dts
new file mode 100644
index 000000000000..b89f6c3eb352
--- /dev/null
+++ b/arch/arc/boot/dts/eznps.dts
@@ -0,0 +1,96 @@
+/*
+ * Copyright(c) 2015 EZchip Technologies.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ */
+
+/dts-v1/;
+
+/ {
+	compatible = "ezchip,arc-nps";
+	clock-frequency = <83333333>;	/* 83.333333 MHZ */
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&intc>;
+	present-cpus = "0-1,16-17";
+	possible-cpus = "0-4095";
+
+	aliases {
+		ethernet0 = &gmac0;
+	};
+
+	chosen {
+		bootargs = "earlycon=uart8250,mmio32be,0xf7209000,115200n8 console=ttyS0,115200n8";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x80000000 0x20000000>;	/* 512M */
+	};
+
+	clocks {
+		sysclk: sysclk {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <83333333>;
+		};
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* child and parent address space 1:1 mapped */
+		ranges;
+
+		intc: interrupt-controller {
+			compatible = "ezchip,nps400-ic";
+			interrupt-controller;
+			#interrupt-cells = <1>;
+		};
+
+		timer0: timer_clkevt {
+			compatible = "snps,arc-timer";
+			interrupts = <3>;
+			clocks = <&sysclk>;
+		};
+
+		timer1: timer_clksrc {
+			compatible = "ezchip,nps400-timer";
+			clocks = <&sysclk>;
+			clock-names="sysclk";
+		};
+
+		uart@f7209000 {
+			compatible = "snps,dw-apb-uart";
+			device_type = "serial";
+			reg = <0xf7209000 0x100>;
+			interrupts = <6>;
+			clocks = <&sysclk>;
+			clock-names="baudclk";
+			baud = <115200>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+			native-endian;
+		};
+
+		gmac0: ethernet@f7470000 {
+			compatible = "ezchip,nps-mgt-enet";
+			reg = <0xf7470000 0x1940>;
+			interrupts = <7>;
+			/* Filled in by U-Boot */
+			mac-address = [ 00 C0 00 F0 04 03 ];
+		};
+	};
+};
diff --git a/arch/arc/boot/dts/nsim_700.dts b/arch/arc/boot/dts/nsim_700.dts
index 105a0017023f..5d5e373e0ebc 100644
--- a/arch/arc/boot/dts/nsim_700.dts
+++ b/arch/arc/boot/dts/nsim_700.dts
@@ -14,7 +14,7 @@
 	clock-frequency = <80000000>;	/* 80 MHZ */
 	#address-cells = <1>;
 	#size-cells = <1>;
-	interrupt-parent = <&intc>;
+	interrupt-parent = <&core_intc>;
 
 	chosen {
 		bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8";
@@ -32,7 +32,13 @@
 		/* child and parent address space 1:1 mapped */
 		ranges;
 
-		intc: interrupt-controller {
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <80000000>;
+		};
+
+		core_intc: interrupt-controller {
 			compatible = "snps,arc700-intc";
 			interrupt-controller;
 			#interrupt-cells = <1>;
diff --git a/arch/arc/boot/dts/nsim_hs.dts b/arch/arc/boot/dts/nsim_hs.dts
index f46633eeb06b..bf05fe5f67b0 100644
--- a/arch/arc/boot/dts/nsim_hs.dts
+++ b/arch/arc/boot/dts/nsim_hs.dts
@@ -7,7 +7,7 @@
  */
 /dts-v1/;
 
-/include/ "skeleton.dtsi"
+/include/ "skeleton_hs.dtsi"
 
 / {
 	compatible = "snps,nsim_hs";
@@ -39,6 +39,12 @@
 			 bus addr,   parent bus addr, size */
 		ranges = <0x80000000 0x0 0x80000000 0x80000000>;
 
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <80000000>;
+		};
+
 		core_intc: core-interrupt-controller {
 			compatible = "snps,archs-intc";
 			interrupt-controller;
diff --git a/arch/arc/boot/dts/nsim_hs_idu.dts b/arch/arc/boot/dts/nsim_hs_idu.dts
index 46ab31975612..99eabe1a2bf6 100644
--- a/arch/arc/boot/dts/nsim_hs_idu.dts
+++ b/arch/arc/boot/dts/nsim_hs_idu.dts
@@ -7,7 +7,7 @@
  */
 /dts-v1/;
 
-/include/ "skeleton.dtsi"
+/include/ "skeleton_hs_idu.dtsi"
 
 / {
 	compatible = "snps,nsim_hs";
@@ -29,6 +29,12 @@
 		/* child and parent address space 1:1 mapped */
 		ranges;
 
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <80000000>;
+		};
+
 		core_intc: core-interrupt-controller {
 			compatible = "snps,archs-intc";
 			interrupt-controller;
diff --git a/arch/arc/boot/dts/nsimosci.dts b/arch/arc/boot/dts/nsimosci.dts
index d94b4ce516ad..b5b060adce8a 100644
--- a/arch/arc/boot/dts/nsimosci.dts
+++ b/arch/arc/boot/dts/nsimosci.dts
@@ -14,7 +14,7 @@
 	clock-frequency = <20000000>;	/* 20 MHZ */
 	#address-cells = <1>;
 	#size-cells = <1>;
-	interrupt-parent = <&intc>;
+	interrupt-parent = <&core_intc>;
 
 	chosen {
 		/* this is for console on PGU */
@@ -35,7 +35,13 @@
 		/* child and parent address space 1:1 mapped */
 		ranges;
 
-		intc: interrupt-controller {
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <20000000>;
+		};
+
+		core_intc: interrupt-controller {
 			compatible = "snps,arc700-intc";
 			interrupt-controller;
 			#interrupt-cells = <1>;
diff --git a/arch/arc/boot/dts/nsimosci_hs.dts b/arch/arc/boot/dts/nsimosci_hs.dts
index 034a3139c1e2..325e73090a18 100644
--- a/arch/arc/boot/dts/nsimosci_hs.dts
+++ b/arch/arc/boot/dts/nsimosci_hs.dts
@@ -7,7 +7,7 @@
  */
 /dts-v1/;
 
-/include/ "skeleton.dtsi"
+/include/ "skeleton_hs.dtsi"
 
 / {
 	compatible = "snps,nsimosci_hs";
@@ -35,6 +35,12 @@
 		/* child and parent address space 1:1 mapped */
 		ranges;
 
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <20000000>;
+		};
+
 		core_intc: core-interrupt-controller {
 			compatible = "snps,archs-intc";
 			interrupt-controller;
diff --git a/arch/arc/boot/dts/nsimosci_hs_idu.dts b/arch/arc/boot/dts/nsimosci_hs_idu.dts
index 8a1297e02540..ee03d7126581 100644
--- a/arch/arc/boot/dts/nsimosci_hs_idu.dts
+++ b/arch/arc/boot/dts/nsimosci_hs_idu.dts
@@ -7,7 +7,7 @@
  */
 /dts-v1/;
 
-/include/ "skeleton.dtsi"
+/include/ "skeleton_hs_idu.dtsi"
 
 / {
 	compatible = "snps,nsimosci_hs";
@@ -33,6 +33,12 @@
 		/* child and parent address space 1:1 mapped */
 		ranges;
 
+		core_clk: core_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <5000000>;
+		};
+
 		core_intc: core-interrupt-controller {
 			compatible = "snps,archs-intc";
 			interrupt-controller;
diff --git a/arch/arc/boot/dts/skeleton.dtsi b/arch/arc/boot/dts/skeleton.dtsi
index 296d371a335c..3a10cc633e2b 100644
--- a/arch/arc/boot/dts/skeleton.dtsi
+++ b/arch/arc/boot/dts/skeleton.dtsi
@@ -30,6 +30,20 @@
 		};
 	};
 
+	/* TIMER0 with interrupt for clockevent */
+	timer0 {
+		compatible = "snps,arc-timer";
+		interrupts = <3>;
+		interrupt-parent = <&core_intc>;
+		clocks = <&core_clk>;
+	};
+
+	/* TIMER1 for free running clocksource */
+	timer1 {
+		compatible = "snps,arc-timer";
+		clocks = <&core_clk>;
+	};
+
 	memory {
 		device_type = "memory";
 		reg = <0x80000000 0x10000000>;	/* 256M */
diff --git a/arch/arc/boot/dts/skeleton_hs.dtsi b/arch/arc/boot/dts/skeleton_hs.dtsi
new file mode 100644
index 000000000000..71fd308a9298
--- /dev/null
+++ b/arch/arc/boot/dts/skeleton_hs.dtsi
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/ {
+	compatible = "snps,arc";
+	clock-frequency = <80000000>;	/* 80 MHZ */
+	#address-cells = <1>;
+	#size-cells = <1>;
+	chosen { };
+	aliases { };
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "snps,archs38";
+			reg = <0>;
+		};
+	};
+
+	/* TIMER0 with interrupt for clockevent */
+	timer0 {
+		compatible = "snps,arc-timer";
+		interrupts = <16>;
+		interrupt-parent = <&core_intc>;
+		clocks = <&core_clk>;
+	};
+
+	/* 64-bit Local RTC: preferred clocksource for UP */
+	rtc {
+		compatible = "snps,archs-timer-rtc";
+		clocks = <&core_clk>;
+	};
+
+	/* TIMER1 for free running clocksource: Fallback if rtc not found */
+	timer1 {
+		compatible = "snps,arc-timer";
+		clocks = <&core_clk>;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x80000000 0x10000000>;	/* 256M */
+	};
+};
diff --git a/arch/arc/boot/dts/skeleton_hs_idu.dtsi b/arch/arc/boot/dts/skeleton_hs_idu.dtsi
new file mode 100644
index 000000000000..d1cb25a66989
--- /dev/null
+++ b/arch/arc/boot/dts/skeleton_hs_idu.dtsi