Merge tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux…

…/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:
 "DeviceTree updates for 3.13.  This is a bit larger pull request than
  usual for this cycle with lots of clean-up.

   - Cross arch clean-up and consolidation of early DT scanning code.
   - Clean-up and removal of arch prom.h headers.  Makes arch specific
     prom.h optional on all but Sparc.
   - Addition of interrupts-extended property for devices connected to
     multiple interrupt controllers.
   - Refactoring of DT interrupt parsing code in preparation for
     deferred probe of interrupts.
   - ARM cpu and cpu topology bindings documentation.
   - Various DT vendor binding documentation updates"

* tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (82 commits)
  powerpc: add missing explicit OF includes for ppc
  dt/irq: add empty of_irq_count for !OF_IRQ
  dt: disable self-tests for !OF_IRQ
  of: irq: Fix interrupt-map entry matching
  MIPS: Netlogic: replace early_init_devtree() call
  of: Add Panasonic Corporation vendor prefix
  of: Add Chunghwa Picture Tubes Ltd. vendor prefix
  of: Add AU Optronics Corporation vendor prefix
  of/irq: Fix potential buffer overflow
  of/irq: Fix bug in interrupt parsing refactor.
  of: set dma_mask to point to coherent_dma_mask
  of: add vendor prefix for PHYTEC Messtechnik GmbH
  DT: sort vendor-prefixes.txt
  of: Add vendor prefix for Cadence
  of: Add empty for_each_available_child_of_node() macro definition
  arm/versatile: Fix versatile irq specifications.
  of/irq: create interrupts-extended property
  microblaze/pci: Drop PowerPC-ism from irq parsing
  of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code.
  of/irq: Use irq_of_parse_and_map()
  ...

Documentation/devicetree/bindings/interrupt-controller/interrupts.txt

@@ -4,16 +4,33 @@ Specifying interrupt information for devices
 1) Interrupt client nodes
 -------------------------
 
-Nodes that describe devices which generate interrupts must contain an
-"interrupts" property. This property must contain a list of interrupt
-specifiers, one per output interrupt. The format of the interrupt specifier is
-determined by the interrupt controller to which the interrupts are routed; see
-section 2 below for details.
+Nodes that describe devices which generate interrupts must contain an either an
+"interrupts" property or an "interrupts-extended" property. These properties
+contain a list of interrupt specifiers, one per output interrupt. The format of
+the interrupt specifier is determined by the interrupt controller to which the
+interrupts are routed; see section 2 below for details.
+
+  Example:
+	interrupt-parent = <&intc1>;
+	interrupts = <5 0>, <6 0>;
 
 The "interrupt-parent" property is used to specify the controller to which
 interrupts are routed and contains a single phandle referring to the interrupt
 controller node. This property is inherited, so it may be specified in an
-interrupt client node or in any of its parent nodes.
+interrupt client node or in any of its parent nodes. Interrupts listed in the
+"interrupts" property are always in reference to the node's interrupt parent.
+
+The "interrupts-extended" property is a special form for use when a node needs
+to reference multiple interrupt parents. Each entry in this property contains
+both the parent phandle and the interrupt specifier. "interrupts-extended"
+should only be used when a device has multiple interrupt parents.
+
+  Example:
+	interrupts-extended = <&intc1 5 1>, <&intc2 1 0>;
+
+A device node may contain either "interrupts" or "interrupts-extended", but not
+both. If both properties are present, then the operating system should log an
+error and use only the data in "interrupts".
 
 2) Interrupt controller nodes
 -----------------------------

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -12,12 +12,15 @@ amcc	Applied Micro Circuits Corporation (APM, formally AMCC)
 apm	Applied Micro Circuits Corporation (APM)
 arm	ARM Ltd.
 atmel	Atmel Corporation
+auo	AU Optronics Corporation
 avago	Avago Technologies
 bosch	Bosch Sensortec GmbH
 brcm	Broadcom Corporation
 capella	Capella Microsystems, Inc
 cavium	Cavium, Inc.
+cdns	Cadence Design Systems Inc.
 chrp	Common Hardware Reference Platform
+chunghwa	Chunghwa Picture Tubes Ltd.
 cirrus	Cirrus Logic, Inc.
 cortina	Cortina Systems, Inc.
 dallas	Maxim Integrated Products (formerly Dallas Semiconductor)
@@ -46,6 +49,8 @@ nintendo	Nintendo
 nvidia	NVIDIA
 nxp	NXP Semiconductors
 onnn	ON Semiconductor Corp.
+panasonic	Panasonic Corporation
+phytec	PHYTEC Messtechnik GmbH
 picochip	Picochip Ltd
 powervr	PowerVR (deprecated, use img)
 qca	Qualcomm Atheros, Inc.
@@ -65,12 +70,12 @@ snps 	Synopsys, Inc.
 st	STMicroelectronics
 ste	ST-Ericsson
 stericsson	ST-Ericsson
-toumaz	Toumaz
 ti	Texas Instruments
 toshiba	Toshiba Corporation
+toumaz	Toumaz
 v3	V3 Semiconductor
 via	VIA Technologies, Inc.
+winbond Winbond Electronics corp.
 wlf	Wolfson Microelectronics
 wm	Wondermedia Technologies, Inc.
-winbond Winbond Electronics corp.
 xlnx	Xilinx

arch/arc/include/asm/mach_desc.h

@@ -51,22 +51,12 @@ struct machine_desc {
 /*
  * Current machine - only accessible during boot.
  */
-extern struct machine_desc *machine_desc;
+extern const struct machine_desc *machine_desc;
 
 /*
  * Machine type table - also only accessible during boot
  */
-extern struct machine_desc __arch_info_begin[], __arch_info_end[];
-#define for_each_machine_desc(p)			\
-	for (p = __arch_info_begin; p < __arch_info_end; p++)
-
-static inline struct machine_desc *default_machine_desc(void)
-{
-	/* the default machine is the last one linked in */
-	if (__arch_info_end - 1 < __arch_info_begin)
-		return NULL;
-	return __arch_info_end - 1;
-}
+extern const struct machine_desc __arch_info_begin[], __arch_info_end[];
 
 /*
  * Set of macros to define architecture features.
@@ -81,7 +71,6 @@ __attribute__((__section__(".arch.info.init"))) = {	\
 #define MACHINE_END				\
 };
 
-extern struct machine_desc *setup_machine_fdt(void *dt);
-extern void __init copy_devtree(void);
+extern const struct machine_desc *setup_machine_fdt(void *dt);
 
 #endif

arch/arc/kernel/devtree.c

@@ -14,104 +14,47 @@
 #include <linux/memblock.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
-#include <asm/prom.h>
 #include <asm/clk.h>
 #include <asm/mach_desc.h>
 
+static const void * __init arch_get_next_mach(const char *const **match)
+{
+	static const struct machine_desc *mdesc = __arch_info_begin;
+	const struct machine_desc *m = mdesc;
+
+	if (m >= __arch_info_end)
+		return NULL;
+
+	mdesc++;
+	*match = m->dt_compat;
+	return m;
+}
+
 /**
  * setup_machine_fdt - Machine setup when an dtb was passed to the kernel
  * @dt:		virtual address pointer to dt blob
  *
  * If a dtb was passed to the kernel, then use it to choose the correct
  * machine_desc and to setup the system.
  */
-struct machine_desc * __init setup_machine_fdt(void *dt)
+const struct machine_desc * __init setup_machine_fdt(void *dt)
 {
-	struct boot_param_header *devtree = dt;
-	struct machine_desc *mdesc = NULL, *mdesc_best = NULL;
-	unsigned int score, mdesc_score = ~1;
+	const struct machine_desc *mdesc;
 	unsigned long dt_root;
-	const char *model, *compat;
 	void *clk;
-	char manufacturer[16];
 	unsigned long len;
 
-	/* check device tree validity */
-	if (be32_to_cpu(devtree->magic) != OF_DT_HEADER)
+	if (!early_init_dt_scan(dt))
 		return NULL;
 
-	initial_boot_params = devtree;
-	dt_root = of_get_flat_dt_root();
-
-	/*
-	 * The kernel could be multi-platform enabled, thus could have many
-	 * "baked-in" machine descriptors. Search thru all for the best
-	 * "compatible" string match.
-	 */
-	for_each_machine_desc(mdesc) {
-		score = of_flat_dt_match(dt_root, mdesc->dt_compat);
-		if (score > 0 && score < mdesc_score) {
-			mdesc_best = mdesc;
-			mdesc_score = score;
-		}
-	}
-	if (!mdesc_best) {
-		const char *prop;
-		long size;
-
-		pr_err("\n unrecognized device tree list:\n[ ");
-
-		prop = of_get_flat_dt_prop(dt_root, "compatible", &size);
-		if (prop) {
-			while (size > 0) {
-				printk("'%s' ", prop);
-				size -= strlen(prop) + 1;
-				prop += strlen(prop) + 1;
-			}
-		}
-		printk("]\n\n");
-
+	mdesc = of_flat_dt_match_machine(NULL, arch_get_next_mach);
+	if (!mdesc)
 		machine_halt();
-	}
-
-	/* compat = "<manufacturer>,<model>" */
-	compat =  mdesc_best->dt_compat[0];
-
-	model = strchr(compat, ',');
-	if (model)
-		model++;
-
-	strlcpy(manufacturer, compat, model ? model - compat : strlen(compat));
-
-	pr_info("Board \"%s\" from %s (Manufacturer)\n", model, manufacturer);
-
-	/* Retrieve various information from the /chosen node */
-	of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
-
-	/* Initialize {size,address}-cells info */
-	of_scan_flat_dt(early_init_dt_scan_root, NULL);
-
-	/* Setup memory, calling early_init_dt_add_memory_arch */
-	of_scan_flat_dt(early_init_dt_scan_memory, NULL);
 
+	dt_root = of_get_flat_dt_root();
 	clk = of_get_flat_dt_prop(dt_root, "clock-frequency", &len);
 	if (clk)
 		arc_set_core_freq(of_read_ulong(clk, len/4));
 
-	return mdesc_best;
-}
-
-/*
- * Copy the flattened DT out of .init since unflattening doesn't copy strings
- * and the normal DT APIs refs them from orig flat DT
- */
-void __init copy_devtree(void)
-{
-	void *alloc = early_init_dt_alloc_memory_arch(
-			be32_to_cpu(initial_boot_params->totalsize), 64);
-	if (alloc) {
-		memcpy(alloc, initial_boot_params,
-				be32_to_cpu(initial_boot_params->totalsize));
-		initial_boot_params = alloc;
-	}
+	return mdesc;
 }

arch/arc/kernel/setup.c

@@ -21,7 +21,6 @@
 #include <asm/setup.h>
 #include <asm/page.h>
 #include <asm/irq.h>
-#include <asm/prom.h>
 #include <asm/unwind.h>
 #include <asm/clk.h>
 #include <asm/mach_desc.h>
@@ -31,7 +30,7 @@
 int running_on_hw = 1;	/* vs. on ISS */
 
 char __initdata command_line[COMMAND_LINE_SIZE];
-struct machine_desc *machine_desc;
+const struct machine_desc *machine_desc;
 
 struct task_struct *_current_task[NR_CPUS];	/* For stack switching */
 
@@ -345,8 +344,7 @@ void __init setup_arch(char **cmdline_p)
 	setup_arch_memory();
 
 	/* copy flat DT out of .init and then unflatten it */
-	copy_devtree();
-	unflatten_device_tree();
+	unflatten_and_copy_device_tree();
 
 	/* Can be issue if someone passes cmd line arg "ro"
 	 * But that is unlikely so keeping it as it is

arch/arc/mm/init.c

@@ -125,10 +125,3 @@ void __init free_initrd_mem(unsigned long start, unsigned long end)
 	free_reserved_area((void *)start, (void *)end, -1, "initrd");
 }
 #endif
-
-#ifdef CONFIG_OF_FLATTREE
-void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
-{
-	pr_err("%s(%llx, %llx)\n", __func__, start, end);
-}
-#endif /* CONFIG_OF_FLATTREE */

arch/arm/boot/dts/testcases/tests-interrupts.dtsi

@@ -0,0 +1,58 @@
+
+/ {
+	testcase-data {
+		interrupts {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			test_intc0: intc0 {
+				interrupt-controller;
+				#interrupt-cells = <1>;
+			};
+
+			test_intc1: intc1 {
+				interrupt-controller;
+				#interrupt-cells = <3>;
+			};
+
+			test_intc2: intc2 {
+				interrupt-controller;
+				#interrupt-cells = <2>;
+			};
+
+			test_intmap0: intmap0 {
+				#interrupt-cells = <1>;
+				#address-cells = <0>;
+				interrupt-map = <1 &test_intc0 9>,
+						<2 &test_intc1 10 11 12>,
+						<3 &test_intc2 13 14>,
+						<4 &test_intc2 15 16>;
+			};
+
+			test_intmap1: intmap1 {
+				#interrupt-cells = <2>;
+				interrupt-map = <0x5000 1 2 &test_intc0 15>;
+			};
+
+			interrupts0 {
+				interrupt-parent = <&test_intc0>;
+				interrupts = <1>, <2>, <3>, <4>;
+			};
+
+			interrupts1 {
+				interrupt-parent = <&test_intmap0>;
+				interrupts = <1>, <2>, <3>, <4>;
+			};
+
+			interrupts-extended0 {
+				reg = <0x5000 0x100>;
+				interrupts-extended = <&test_intc0 1>,
+						      <&test_intc1 2 3 4>,
+						      <&test_intc2 5 6>,
+						      <&test_intmap0 1>,
+						      <&test_intmap0 2>,
+						      <&test_intmap0 3>,
+						      <&test_intmap1 1 2>;
+			};
+		};
+	};
+};

arch/arm/boot/dts/testcases/tests.dtsi

@@ -1 +1,2 @@
 /include/ "tests-phandle.dtsi"
+/include/ "tests-interrupts.dtsi"

arch/arm/boot/dts/versatile-ab.dts

@@ -185,7 +185,7 @@
 			mmc@5000 {
 				compatible = "arm,primecell";
 				reg = < 0x5000 0x1000>;
-				interrupts = <22 34>;
+				interrupts-extended = <&vic 22 &sic 2>;
 			};
 			kmi@6000 {
 				compatible = "arm,pl050", "arm,primecell";

arch/arm/boot/dts/versatile-pb.dts

@@ -41,7 +41,7 @@
 			mmc@b000 {
 				compatible = "arm,primecell";
 				reg = <0xb000 0x1000>;
-				interrupts = <23 34>;
+				interrupts-extended = <&vic 23 &sic 2>;
 			};
 		};
 	};

arch/arm/include/asm/prom.h

@@ -11,8 +11,6 @@
 #ifndef __ASMARM_PROM_H
 #define __ASMARM_PROM_H
 
-#define HAVE_ARCH_DEVTREE_FIXUPS
-
 #ifdef CONFIG_OF
 
 extern const struct machine_desc *setup_machine_fdt(unsigned int dt_phys);