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of/fdt: create common debugfs

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Both powerpc and microblaze have the same FDT blob in debugfs feature.
Move this to common location and remove the powerpc and microblaze
implementations. This feature could become more useful when FDT
overlay support is added.

This changes the path of the blob from "$arch/flat-device-tree" to
"device-tree/flat-device-tree".

Signed-off-by: Rob Herring <robh@kernel.org>
Tested-by: Michal Simek <michal.simek@xilinx.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Tested-by: Grant Likely <grant.likely@linaro.org>
Tested-by: Stephen Chivers <schivers@csc.com>
This commit is contained in:
Rob Herring 2014-04-02 16:56:48 -05:00
parent c972de1497
commit b0a6fb36a4
3 changed files with 24 additions and 52 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
arch/microblaze/kernel/prom.c
View file

@ -114,34 +114,3 @@ void __init early_init_devtree(void *params)
pr_debug(" <- early_init_devtree()\n");
}
/*******
*
* New implementation of the OF "find" APIs, return a refcounted
* object, call of_node_put() when done. The device tree and list
* are protected by a rw_lock.
*
* Note that property management will need some locking as well,
* this isn't dealt with yet.
*
*******/
#if defined(CONFIG_DEBUG_FS) && defined(DEBUG)
static struct debugfs_blob_wrapper flat_dt_blob;
static int __init export_flat_device_tree(void)
{
struct dentry *d;
flat_dt_blob.data = initial_boot_params;
flat_dt_blob.size = initial_boot_params->totalsize;
d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR,
of_debugfs_root, &flat_dt_blob);
if (!d)
return 1;
return 0;
}
device_initcall(export_flat_device_tree);
#endif

21
arch/powerpc/kernel/prom.c
View file

@ -29,7 +29,6 @@
#include <linux/bitops.h>
#include <linux/export.h>
#include <linux/kexec.h>
#include <linux/debugfs.h>
#include <linux/irq.h>
#include <linux/memblock.h>
#include <linux/of.h>
@ -924,23 +923,3 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
{
return (int)phys_id == get_hard_smp_processor_id(cpu);
}
#if defined(CONFIG_DEBUG_FS) && defined(DEBUG)
static struct debugfs_blob_wrapper flat_dt_blob;
static int __init export_flat_device_tree(void)
{
struct dentry *d;
flat_dt_blob.data = initial_boot_params;
flat_dt_blob.size = be32_to_cpu(initial_boot_params->totalsize);
d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR,
powerpc_debugfs_root, &flat_dt_blob);
if (!d)
return 1;
return 0;
}
__initcall(export_flat_device_tree);
#endif

24
drivers/of/fdt.c
View file

@ -20,6 +20,7 @@
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/libfdt.h>
#include <linux/debugfs.h>
#include <asm/setup.h> /* for COMMAND_LINE_SIZE */
#include <asm/page.h>
@ -916,4 +917,27 @@ void __init unflatten_and_copy_device_tree(void)
unflatten_device_tree();
}
#if defined(CONFIG_DEBUG_FS) && defined(DEBUG)
static struct debugfs_blob_wrapper flat_dt_blob;
static int __init of_flat_dt_debugfs_export_fdt(void)
{
struct dentry *d = debugfs_create_dir("device-tree", NULL);
if (!d)
return -ENOENT;
flat_dt_blob.data = initial_boot_params;
flat_dt_blob.size = fdt_totalsize(initial_boot_params);
d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR,
d, &flat_dt_blob);
if (!d)
return -ENOENT;
return 0;
}
module_init(of_flat_dt_debugfs_export_fdt);
#endif
#endif /* CONFIG_OF_EARLY_FLATTREE */