1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/usb/gadget/function/u_ether_configfs.h b/drivers/usb/gadget/function/u_ether_configfs.h
index c71133de17e7..e4c3f84af4c3 100644
--- a/drivers/usb/gadget/function/u_ether_configfs.h
+++ b/drivers/usb/gadget/function/u_ether_configfs.h
@@ -153,4 +153,39 @@ out:									\
                                                                         \
         CONFIGFS_ATTR_RO(_f_##_opts_, ifname)
 
+#define USB_ETHER_CONFIGFS_ITEM_ATTR_U8_RW(_f_, _n_)                    \
+        static ssize_t _f_##_opts_##_n_##_show(struct config_item *item,\
+                                               char *page)              \
+        {                                                               \
+                struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item);  \
+                int ret;                                                \
+                                                                        \
+                mutex_lock(&opts->lock);                                \
+                ret = sprintf(page, "%02x\n", opts->_n_);               \
+                mutex_unlock(&opts->lock);                              \
+                                                                        \
+                return ret;                                             \
+        }                                                               \
+                                                                        \
+        static ssize_t _f_##_opts_##_n_##_store(struct config_item *item,\
+                                                const char *page,       \
+                                                size_t len)             \
+        {                                                               \
+                struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item);  \
+                int ret;                                                \
+                u8 val;                                                 \
+                                                                        \
+                mutex_lock(&opts->lock);                                \
+                ret = sscanf(page, "%02hhx", &val);                     \
+                if (ret > 0) {                                          \
+                        opts->_n_ = val;                                \
+                        ret = len;                                      \
+                }                                                       \
+                mutex_unlock(&opts->lock);                              \
+                                                                        \
+                return ret;                                             \
+        }                                                               \
+                                                                        \
+        CONFIGFS_ATTR(_f_##_opts_, _n_)
+
 #endif /* __U_ETHER_CONFIGFS_H */