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drivers: of/base: move of_init to driver_init 

Commit 5590f3196b ("drivers/core/of: Add symlink to device-tree from
devices with an OF node") adds the symlink `of_node` for each device
pointing to it's device tree node while creating/initialising it.

However the devicetree sysfs is created and setup in of_init which is
executed at core_initcall level. For all the devices created before
of_init, the following error is thrown:
	"Error -2(-ENOENT) creating of_node link"

Like many other components in driver model, initialize the sysfs support
for OF/devicetree from driver_init so that it's ready before any devices
are created.

Fixes: 5590f3196b ("drivers/core/of: Add symlink to device-tree from
	devices with an OF node")
Suggested-by: Rob Herring <robh+dt@kernel.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Robert Schwebel <r.schwebel@pengutronix.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sudeep Holla 2015-05-14 15:28:24 +01:00 committed by Greg Kroah-Hartman
parent e26081808e
commit 194ec9368c
3 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/base/init.c
View File

@ -8,6 +8,7 @@
#include <linux/device.h>
#include <linux/init.h>
#include <linux/memory.h>
#include <linux/of.h>
#include "base.h"
@ -34,4 +35,5 @@ void __init driver_init(void)
cpu_dev_init();
memory_dev_init();
container_dev_init();
of_core_init();
}

8
drivers/of/base.c
View File

@ -189,7 +189,7 @@ int __of_attach_node_sysfs(struct device_node *np)
return 0;
}
static int __init of_init(void)
void __init of_core_init(void)
{
struct device_node *np;
@ -198,7 +198,8 @@ static int __init of_init(void)
of_kset = kset_create_and_add("devicetree", NULL, firmware_kobj);
if (!of_kset) {
mutex_unlock(&of_mutex);
return -ENOMEM;
pr_err("devicetree: failed to register existing nodes\n");
return;
}
for_each_of_allnodes(np)
__of_attach_node_sysfs(np);
@ -207,10 +208,7 @@ static int __init of_init(void)
/* Symlink in /proc as required by userspace ABI */
if (of_root)
proc_symlink("device-tree", NULL, "/sys/firmware/devicetree/base");
return 0;
}
core_initcall(of_init);
static struct property *__of_find_property(const struct device_node *np,
const char *name, int *lenp)

6
include/linux/of.h
View File

@ -121,6 +121,8 @@ extern struct device_node *of_stdout;
extern raw_spinlock_t devtree_lock;
#ifdef CONFIG_OF
void of_core_init(void);
static inline bool is_of_node(struct fwnode_handle *fwnode)
{
return fwnode && fwnode->type == FWNODE_OF;
@ -376,6 +378,10 @@ bool of_console_check(struct device_node *dn, char *name, int index);
#else /* CONFIG_OF */
static inline void of_core_init(void)
{
}
static inline bool is_of_node(struct fwnode_handle *fwnode)
{
return false;