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usb/core: Added devspec sysfs entry for devices behind the usb hub

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Grub finds incorrect of_node path for devices behind usb hub.
Added devspec sysfs entry for devices behind usb hub so that
right of_node path is returned during grub sysfs walk for these
devices.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vijay Kumar 2016-10-06 12:06:11 -07:00 committed by Greg Kroah-Hartman
parent 6110c425d9
commit 51fa91475e
1 changed files with 15 additions and 0 deletions
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15
drivers/usb/core/sysfs.c
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@ -14,6 +14,7 @@
#include <linux/string.h>
#include <linux/usb.h>
#include <linux/usb/quirks.h>
#include <linux/of.h>
#include "usb.h"
/* Active configuration fields */
@ -104,6 +105,17 @@ static ssize_t bConfigurationValue_store(struct device *dev,
static DEVICE_ATTR_IGNORE_LOCKDEP(bConfigurationValue, S_IRUGO | S_IWUSR,
bConfigurationValue_show, bConfigurationValue_store);
#ifdef CONFIG_OF
static ssize_t devspec_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct device_node *of_node = dev->of_node;
return sprintf(buf, "%s\n", of_node_full_name(of_node));
}
static DEVICE_ATTR_RO(devspec);
#endif
/* String fields */
#define usb_string_attr(name) \
static ssize_t name##_show(struct device *dev, \
@ -786,6 +798,9 @@ static struct attribute *dev_attrs[] = {
&dev_attr_remove.attr,
&dev_attr_removable.attr,
&dev_attr_ltm_capable.attr,
#ifdef CONFIG_OF
&dev_attr_devspec.attr,
#endif
NULL,
};
static struct attribute_group dev_attr_grp = {