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authorVijay Kumar <vijay.ac.kumar@oracle.com>2016-10-06 12:06:11 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-10-27 16:59:59 +0200
commit51fa91475e431e75b802dbab7c056f2829dc9410 (patch)
tree90d0a6a2e09d3acabc015123cd1273a80552962c /drivers/usb
parent6110c425d98b7ed036bba3670e635a9363dd072e (diff)
usb/core: Added devspec sysfs entry for devices behind the usb hub
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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/core/sysfs.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index c953a0f1c695..84d66d573196 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -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 = {