powerpc/85xx: enable MTD options in sbc8548 defconfig
This board has soldered on flash, and a SODIMM flash module.
Both can be used for booting, via switching JP12 and SW2.8
and using the sbc8548-altflash.dts when booting from SODIMM.
Here we enable MTD in kernel so that we can see the bootloader
(and other flash sectors) from linux.
Normal configuration:
root@sbc8548:~# cat /proc/mtd
dev: size erasesize name
mtd0: 007a0000 00020000 "space"
mtd1: 00060000 00020000 "bootloader"
mtd2: 03f00000 00080000 "space"
mtd3: 00100000 00080000 "bootloader"
root@sbc8548:~# dd if=/dev/mtd1 count=1 bs=48|hexdump -C
1+0 records in
1+0 records out
00000000 27 05 19 56 55 2d 42 6f 6f 74 20 32 30 31 32 2e |'..VU-Boot 2012.|
00000010 31 30 2d 64 69 72 74 79 20 28 4a 61 6e 20 31 39 |10-dirty (Jan 19|
00000020 20 32 30 31 33 20 2d 20 31 39 3a 34 30 3a 31 31 | 2013 - 19:40:11|
00000030
root@sbc8548:~# dd if=/dev/mtd3 count=1 bs=48|hexdump -C
1+0 records in
1+0 records out
00000000 27 05 19 56 55 2d 42 6f 6f 74 20 32 30 31 32 2e |'..VU-Boot 2012.|
00000010 31 30 2d 64 69 72 74 79 20 28 44 65 63 20 31 33 |10-dirty (Dec 13|
00000020 20 32 30 31 32 20 2d 20 31 35 3a 30 30 3a 30 37 | 2012 - 15:00:07|
00000030
root@sbc8548:~#
Alternate configuration, with sbc8548-altflash.dts:
root@sbc8548:~# cat /proc/mtd
dev: size erasesize name
mtd0: 03f00000 00080000 "space"
mtd1: 00100000 00080000 "bootloader"
mtd2: 007a0000 00020000 "space"
mtd3: 00060000 00020000 "bootloader"
root@sbc8548:~# dd if=/dev/mtd1 count=1 bs=48|hexdump -C
1+0 records in
1+0 records out
00000000 27 05 19 56 55 2d 42 6f 6f 74 20 32 30 31 32 2e |'..VU-Boot 2012.|
00000010 31 30 2d 64 69 72 74 79 20 28 44 65 63 20 31 33 |10-dirty (Dec 13|
00000020 20 32 30 31 32 20 2d 20 31 35 3a 30 30 3a 30 37 | 2012 - 15:00:07|
00000030
root@sbc8548:~# dd if=/dev/mtd3 count=1 bs=48|hexdump -C
1+0 records in
1+0 records out
00000000 27 05 19 56 55 2d 42 6f 6f 74 20 32 30 31 32 2e |'..VU-Boot 2012.|
00000010 31 30 2d 64 69 72 74 79 20 28 4a 61 6e 20 31 39 |10-dirty (Jan 19|
00000020 20 32 30 31 33 20 2d 20 31 39 3a 34 30 3a 31 31 | 2013 - 19:40:11|
00000030
root@sbc8548:~#
Note that in the latter, the larger SODIMM device appears 1st,
as mtd0 and mtd1, as indicated in the sizes, and in the date
of the u-boot image.
The kernel configuration is the same in both cases; only the dtb
needs to be changed in accordance with the JP12/SW2.8 settings.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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