mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-18 18:23:53 +08:00
b5bf5b6786
This adds sysfs nodes that the hotplug userspace can use to load the
appropriate modules.
In order for hotplug to work with macio devices, patches to
module-init-tools and hotplug must be applied. Those patches are
available at:
ftp://ftp.suse.com/pub/people/jeffm/linux/macio-hotplug/
Changes: The previous versions were built on 2.6.12. 2.6.13-rcX introduced
a device_attribute parameter to the show functions. Since that
parameter was treated as the output buffer, memory corruption would
result, causing Oopsen very quickly.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include <linux/config.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/stat.h>
|
|
#include <asm/macio.h>
|
|
|
|
|
|
#define macio_config_of_attr(field, format_string) \
|
|
static ssize_t \
|
|
field##_show (struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct macio_dev *mdev = to_macio_device (dev); \
|
|
return sprintf (buf, format_string, mdev->ofdev.node->field); \
|
|
}
|
|
|
|
static ssize_t
|
|
compatible_show (struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct of_device *of;
|
|
char *compat;
|
|
int cplen;
|
|
int length = 0;
|
|
|
|
of = &to_macio_device (dev)->ofdev;
|
|
compat = (char *) get_property(of->node, "compatible", &cplen);
|
|
if (!compat) {
|
|
*buf = '\0';
|
|
return 0;
|
|
}
|
|
while (cplen > 0) {
|
|
int l;
|
|
length += sprintf (buf, "%s\n", compat);
|
|
buf += length;
|
|
l = strlen (compat) + 1;
|
|
compat += l;
|
|
cplen -= l;
|
|
}
|
|
|
|
return length;
|
|
}
|
|
|
|
macio_config_of_attr (name, "%s\n");
|
|
macio_config_of_attr (type, "%s\n");
|
|
|
|
struct device_attribute macio_dev_attrs[] = {
|
|
__ATTR_RO(name),
|
|
__ATTR_RO(type),
|
|
__ATTR_RO(compatible),
|
|
__ATTR_NULL
|
|
};
|