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authorLinus Torvalds <torvalds@linux-foundation.org>2013-11-12 16:52:17 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-12 16:52:17 +0900
commit10d0c9705e80bbd3d587c5fad24599aabaca6688 (patch)
tree9456083a1b04b8d98da08d88e937cfeff80e2a7d /arch/arc
parent85b656cf1560e27a89354a23f2c10ba229d2f173 (diff)
parentc11eede69b6ad0ac44ebc1e021a8d2699c5f1f8f (diff)
downloadop-kernel-dev-10d0c9705e80bbd3d587c5fad24599aabaca6688.zip
op-kernel-dev-10d0c9705e80bbd3d587c5fad24599aabaca6688.tar.gz
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() ...
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/include/asm/mach_desc.h17
-rw-r--r--arch/arc/include/asm/prom.h14
-rw-r--r--arch/arc/kernel/devtree.c97
-rw-r--r--arch/arc/kernel/setup.c6
-rw-r--r--arch/arc/mm/init.c7
5 files changed, 25 insertions, 116 deletions
diff --git a/arch/arc/include/asm/mach_desc.h b/arch/arc/include/asm/mach_desc.h
index 9998dc8..e8993a2 100644
--- a/arch/arc/include/asm/mach_desc.h
+++ b/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
diff --git a/arch/arc/include/asm/prom.h b/arch/arc/include/asm/prom.h
deleted file mode 100644
index 692d0d07..0000000
--- a/arch/arc/include/asm/prom.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/*
- * Copyright (C) 2012 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.
- */
-
-#ifndef _ASM_ARC_PROM_H_
-#define _ASM_ARC_PROM_H_
-
-#define HAVE_ARCH_DEVTREE_FIXUPS
-
-#endif
diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c
index 2340af0..b6dc4e2 100644
--- a/arch/arc/kernel/devtree.c
+++ b/arch/arc/kernel/devtree.c
@@ -14,10 +14,22 @@
#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
@@ -25,93 +37,24 @@
* 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;
}
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index d9e15f1..643eae4 100644
--- a/arch/arc/kernel/setup.c
+++ b/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
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 81279ec..55e0a85 100644
--- a/arch/arc/mm/init.c
+++ b/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 */
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