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powerpc/vio: Add modalias support 

BenH: Added to vio_cmo_dev_attrs as well

Provide a modalias entry for VIO devices in sysfs.  I believe
this was another initrd generation bugfix for anaconda.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2010-04-07 14:44:28 +10:00
parent 55052eeca6
commit 578b7cd151
1 changed files with 21 additions and 0 deletions
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21
arch/powerpc/kernel/vio.c
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@ -958,9 +958,12 @@ viodev_cmo_rd_attr(allocated);
static ssize_t name_show(struct device *, struct device_attribute *, char *);
static ssize_t devspec_show(struct device *, struct device_attribute *, char *);
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
char *buf);
static struct device_attribute vio_cmo_dev_attrs[] = {
__ATTR_RO(name),
__ATTR_RO(devspec),
__ATTR_RO(modalias),
__ATTR(cmo_desired, S_IWUSR|S_IRUSR|S_IWGRP|S_IRGRP|S_IROTH,
viodev_cmo_desired_show, viodev_cmo_desired_set),
__ATTR(cmo_entitled, S_IRUGO, viodev_cmo_entitled_show, NULL),
@ -1320,9 +1323,27 @@ static ssize_t devspec_show(struct device *dev,
return sprintf(buf, "%s\n", of_node ? of_node->full_name : "none");
}
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
const struct vio_dev *vio_dev = to_vio_dev(dev);
struct device_node *dn;
const char *cp;
dn = dev->archdata.of_node;
if (!dn)
return -ENODEV;
cp = of_get_property(dn, "compatible", NULL);
if (!cp)
return -ENODEV;
return sprintf(buf, "vio:T%sS%s\n", vio_dev->type, cp);
}
static struct device_attribute vio_dev_attrs[] = {
__ATTR_RO(name),
__ATTR_RO(devspec),
__ATTR_RO(modalias),
__ATTR_NULL
};