README: Drop unused JFFS2 options
There appear to be neither implemented nor used. Drop them. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
parent
9dd05fb8c8
commit
b2482dffa0
12
README
12
README
@ -1656,23 +1656,13 @@ The following options need to be configured:
|
|||||||
If not defined the default value "mbr" is used.
|
If not defined the default value "mbr" is used.
|
||||||
|
|
||||||
- Journaling Flash filesystem support:
|
- Journaling Flash filesystem support:
|
||||||
CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE,
|
CONFIG_JFFS2_NAND
|
||||||
CONFIG_JFFS2_NAND_DEV
|
|
||||||
Define these for a default partition on a NAND device
|
Define these for a default partition on a NAND device
|
||||||
|
|
||||||
CONFIG_SYS_JFFS2_FIRST_SECTOR,
|
CONFIG_SYS_JFFS2_FIRST_SECTOR,
|
||||||
CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS
|
CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS
|
||||||
Define these for a default partition on a NOR device
|
Define these for a default partition on a NOR device
|
||||||
|
|
||||||
CONFIG_SYS_JFFS_CUSTOM_PART
|
|
||||||
Define this to create an own partition. You have to provide a
|
|
||||||
function struct part_info* jffs2_part_info(int part_num)
|
|
||||||
|
|
||||||
If you define only one JFFS2 partition you may also want to
|
|
||||||
#define CONFIG_SYS_JFFS_SINGLE_PART 1
|
|
||||||
to disable the command chpart. This is the default when you
|
|
||||||
have not defined a custom partition
|
|
||||||
|
|
||||||
- FAT(File Allocation Table) filesystem write function support:
|
- FAT(File Allocation Table) filesystem write function support:
|
||||||
CONFIG_FAT_WRITE
|
CONFIG_FAT_WRITE
|
||||||
|
|
||||||
|
@ -19,52 +19,15 @@ more or less a bubble sort. That algorithm is known to be O(n^2),
|
|||||||
thus you should really consider if you can avoid it!
|
thus you should really consider if you can avoid it!
|
||||||
|
|
||||||
|
|
||||||
There is two ways for JFFS2 to find the disk. The default way uses
|
There only one way for JFFS2 to find the disk. It uses the flash_info
|
||||||
the flash_info structure to find the start of a JFFS2 disk (called
|
structure to find the start of a JFFS2 disk (called partition in the code)
|
||||||
partition in the code) and you can change where the partition is with
|
and you can change where the partition is with two defines.
|
||||||
two defines.
|
|
||||||
|
|
||||||
CONFIG_SYS_JFFS2_FIRST_BANK
|
CONFIG_SYS_JFFS2_FIRST_BANK
|
||||||
defined the first flash bank to use
|
defined the first flash bank to use
|
||||||
|
|
||||||
CONFIG_SYS_JFFS2_FIRST_SECTOR
|
CONFIG_SYS_JFFS2_FIRST_SECTOR
|
||||||
defines the first sector to use
|
defines the first sector to use
|
||||||
|
|
||||||
|
|
||||||
The second way is to define CONFIG_SYS_JFFS_CUSTOM_PART and implement the
|
|
||||||
jffs2_part_info(int part_num) function in your board specific files.
|
|
||||||
In this mode CONFIG_SYS_JFFS2_FIRST_BANK and CONFIG_SYS_JFFS2_FIRST_SECTOR is not
|
|
||||||
used.
|
|
||||||
|
|
||||||
The input is a partition number starting with 0.
|
|
||||||
Return a pointer to struct part_info or NULL for error;
|
|
||||||
|
|
||||||
Ex jffs2_part_info() for one partition.
|
|
||||||
---
|
|
||||||
#if defined CONFIG_SYS_JFFS_CUSTOM_PART
|
|
||||||
#include <jffs2/jffs2.h>
|
|
||||||
|
|
||||||
static struct part_info part;
|
|
||||||
|
|
||||||
struct part_info*
|
|
||||||
jffs2_part_info(int part_num)
|
|
||||||
{
|
|
||||||
if(part_num==0){
|
|
||||||
if(part.usr_priv==(void*)1)
|
|
||||||
return ∂
|
|
||||||
|
|
||||||
memset(&part, 0, sizeof(part));
|
|
||||||
part.offset=(char*)0xFF800000;
|
|
||||||
part.size=1024*1024*8;
|
|
||||||
|
|
||||||
/* Mark the struct as ready */
|
|
||||||
part.usr_priv=(void*)1;
|
|
||||||
|
|
||||||
return ∂
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
---
|
---
|
||||||
|
|
||||||
TODO.
|
TODO.
|
||||||
|
@ -2,23 +2,7 @@ JFFS2 NAND support:
|
|||||||
|
|
||||||
To enable, use the following #define in the board configuration file:
|
To enable, use the following #define in the board configuration file:
|
||||||
|
|
||||||
#define CONFIG_JFFS2_NAND 1
|
#define CONFIG_JFFS2_NAND
|
||||||
|
|
||||||
Configuration of partitions is similar to how this is done in U-Boot
|
Configuration of partitions is similar to how this is done in U-Boot
|
||||||
for JFFS2 on top NOR flash. If a single partition is used, it can be
|
for JFFS2 on top NOR flash.
|
||||||
configured using the following #defines in the configuration file:
|
|
||||||
|
|
||||||
#define CONFIG_JFFS2_NAND_DEV 0 /* nand device jffs2 lives on */
|
|
||||||
#define CONFIG_JFFS2_NAND_OFF 0 /* start of jffs2 partition */
|
|
||||||
#define CONFIG_JFFS2_NAND_SIZE 2*1024*1024 /* size of jffs2 partition */
|
|
||||||
|
|
||||||
If more than a single partition is desired, the user can define a
|
|
||||||
CONFIG_SYS_JFFS_CUSTOM_PART macro and implement a
|
|
||||||
|
|
||||||
struct part_info* jffs2_part_info(int part_num)
|
|
||||||
|
|
||||||
function in a board-specific module. An example of such function is
|
|
||||||
available in common/cmd_jffs2.c
|
|
||||||
|
|
||||||
The default configuration for the DAVE board has a single JFFS2
|
|
||||||
partition of 2 MB size.
|
|
||||||
|
Loading…
Reference in New Issue
Block a user