| What:		/sys/devices/.../mmc_host/mmcX/mmcX:XXXX/enhanced_area_offset | 
 | Date:		January 2011 | 
 | Contact:	Chuanxiao Dong <chuanxiao.dong@intel.com> | 
 | Description: | 
 | 		Enhanced area is a new feature defined in eMMC4.4 standard. | 
 | 		eMMC4.4 or later card can support such feature. This kind of | 
 | 		area can help to improve the card performance. If the feature | 
 | 		is enabled, this attribute will indicate the start address of | 
 | 		enhanced data area. If not, this attribute will be -EINVAL. | 
 | 		Unit Byte. Format decimal. | 
 |  | 
 | What:		/sys/devices/.../mmc_host/mmcX/mmcX:XXXX/enhanced_area_size | 
 | Date:		January 2011 | 
 | Contact:	Chuanxiao Dong <chuanxiao.dong@intel.com> | 
 | Description: | 
 | 		Enhanced area is a new feature defined in eMMC4.4 standard. | 
 | 		eMMC4.4 or later card can support such feature. This kind of | 
 | 		area can help to improve the card performance. If the feature | 
 | 		is enabled, this attribute will indicate the size of enhanced | 
 | 		data area. If not, this attribute will be -EINVAL. | 
 | 		Unit KByte. Format decimal. |