| Simon Glass | cceee55 | 2016-02-29 15:25:55 -0700 | [diff] [blame] | 1 | config BLK |
| 2 | bool "Support block devices" |
| 3 | depends on DM |
| Simon Glass | 7b8492e | 2016-10-01 14:43:18 -0600 | [diff] [blame] | 4 | default y if DM_MMC |
| Simon Glass | cceee55 | 2016-02-29 15:25:55 -0700 | [diff] [blame] | 5 | help |
| 6 | Enable support for block devices, such as SCSI, MMC and USB |
| 7 | flash sticks. These provide a block-level interface which permits |
| 8 | reading, writing and (in some cases) erasing blocks. Block |
| 9 | devices often have a partition table which allows the device to |
| 10 | be partitioned into several areas, called 'partitions' in U-Boot. |
| 11 | A filesystem can be placed in each partition. |
| 12 | |
| Simon Glass | 85ee165 | 2016-05-01 11:35:52 -0600 | [diff] [blame] | 13 | config AHCI |
| 14 | bool "Support SATA controllers with driver model" |
| Simon Glass | cfe85a8 | 2016-01-17 16:11:34 -0700 | [diff] [blame] | 15 | depends on DM |
| Simon Glass | cfe85a8 | 2016-01-17 16:11:34 -0700 | [diff] [blame] | 16 | help |
| 17 | This enables a uclass for disk controllers in U-Boot. Various driver |
| 18 | types can use this, such as AHCI/SATA. It does not provide any standard |
| 19 | operations at present. The block device interface has not been converted |
| 20 | to driver model. |
| Eric Nelson | faf4f05 | 2016-03-28 10:05:44 -0700 | [diff] [blame] | 21 | |
| 22 | config BLOCK_CACHE |
| 23 | bool "Use block device cache" |
| 24 | default n |
| 25 | help |
| 26 | This option enables a disk-block cache for all block devices. |
| 27 | This is most useful when accessing filesystems under U-Boot since |
| 28 | it will prevent repeated reads from directory structures and other |
| 29 | filesystem data structures. |