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[PATCH] openfirmware: add sysfs nodes for open firmware devices

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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>
This commit is contained in:
Jeff Mahoney 2005-07-06 15:26:27 -04:00 committed by Linus Torvalds
parent 5e6557722e
commit b5bf5b6786
3 changed files with 54 additions and 1 deletions
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2
drivers/macintosh/Makefile
View File

@ -4,7 +4,7 @@
# Each configuration option enables a list of files.
obj-$(CONFIG_PPC_PMAC) += macio_asic.o
obj-$(CONFIG_PPC_PMAC) += macio_asic.o macio_sysfs.o
obj-$(CONFIG_PMAC_MEDIABAY) += mediabay.o
obj-$(CONFIG_MAC_EMUMOUSEBTN) += mac_hid.o

3
drivers/macintosh/macio_asic.c
View File

@ -126,11 +126,14 @@ static int macio_device_resume(struct device * dev)
return 0;
}
extern struct device_attribute macio_dev_attrs[];
struct bus_type macio_bus_type = {
.name = "macio",
.match = macio_bus_match,
.suspend = macio_device_suspend,
.resume = macio_device_resume,
.dev_attrs = macio_dev_attrs,
};
static int __init macio_bus_driver_init(void)

50
drivers/macintosh/macio_sysfs.c Normal file
View File

@ -0,0 +1,50 @@
#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
};