UM0851 datasheet(142/245 Pages) STMICROELECTRONICS

142 / 245 page

Non-volatile memory device drivers

UM0851

142/245

Doc ID 16604 Rev 2

.mask_flags

= 0

{

.name

= "rootfs",

.offset

= 0x00380000,

.size

= 0x00500000,

.mask_flags

= 0

{

.name

= "userspace",

.offset

= 0x00880000,

.size

= 0x00780000,

.mask_flags

= 0

}

};

static struct physmap_flash_data emi_norflash_data = {

.width

= 4,

.parts

= emi_norflash_partitions,

.nr_parts

= ARRAY_SIZE(emi_norflash_partitions),

};

static struct resource emi_norflash_resource = {

.start

= NOR_FLASH_PHYS,

.end

= NOR_FLASH_PHYS + SZ_16M - 1,

.flags

= IORESOURCE_MEM,

};

static struct platform_device emi_norflash_device = {

.name

= "physmap-flash",

.id

= 0,

.dev

= {

.platform_data

= &emi_norflash_data,

.num_resources

= 1,

.resource

= &emi_norflash_resource,

};

These settings are based on two M28W640HC chips as used in the SPEAr310 Evaluation

board. You have to modify these settings for different chips.

How to support a new NOR Flash

In case of a new NOR Flash chip, the following needs to be checked in the global

configuration file of U-Boot:

Change CFG_MAX_FLASH_SECT macro definition based on the number of blocks of

NOR Flash.

If you want to change the partition size, the following macro definitions also need to be

modified:

–

CONFIG_BOOTCOMMAND

–

CFG_MONITOR_LEN

–

CFG_MONITOR_BASE

–

CFG_ENV_SIZE

In case of a new NOR Flash chip, the following need to be checked in the resource file of

Linux:

UM0851 Datasheet(PDF) 142 Page - STMicroelectronics

UM0851 Datasheet(HTML) 142 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL