linux-hardened/drivers/macintosh/macio_sysfs.c
scwhab@suse.de dcb34abb4d [PATCH] Add modalias to macio sysfs attributes
Provide a "compatible" entry in /sys/bus/macio/devices/*/ This can be used
to load drivers via the modules.alias file.

Signed-off-by: Olaf Hering <olh@suse.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-29 14:35:58 +10:00

76 lines
1.6 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;
}
static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
char *buf)
{
struct of_device *of;
char *compat;
int cplen;
int length;
of = &to_macio_device (dev)->ofdev;
compat = (char *) get_property (of->node, "compatible", &cplen);
if (!compat) compat = "", cplen = 1;
length = sprintf (buf, "of:N%sT%s", of->node->name, of->node->type);
buf += length;
while (cplen > 0) {
int l;
length += sprintf (buf, "C%s", 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_RO(modalias),
__ATTR_NULL
};