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Paul Gortmaker d5bc813f40 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>
2013-02-13 07:49:00 -06:00
..
alpha ALPHA: drivers: remove __dev* attributes. 2013-01-03 15:57:13 -08:00
arm Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2013-01-24 12:44:57 -08:00
arm64 arm64: elf: fix core dumping to match what glibc expects 2013-01-22 17:50:59 +00:00
avr32 ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
blackfin ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
c6x These are a few cleanups for asm-generic: 2012-12-21 16:39:08 -08:00
cris ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
frv ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
h8300 These are a few cleanups for asm-generic: 2012-12-21 16:39:08 -08:00
hexagon Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-20 18:05:28 -08:00
ia64 ia64: kill thread_matches(), unexport ptrace_check_attach() 2013-01-20 12:26:05 -08:00
m32r ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
m68k Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k 2013-01-23 13:31:15 -08:00
microblaze Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze 2013-01-07 07:39:32 -08:00
mips Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-01-07 07:50:41 -08:00
mn10300 arch/mn10300/Kconfig: select CONFIG_GENERIC_ATOMIC64 2013-01-11 14:54:55 -08:00
openrisc ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
parisc parisc: sigaltstack doesn't round ss.ss_sp as required 2013-01-07 23:06:27 +01:00
powerpc powerpc/85xx: enable MTD options in sbc8548 defconfig 2013-02-13 07:49:00 -06:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-01-17 08:56:30 -08:00
score ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
sh sh: ecovec: add sample amixer settings 2013-01-16 18:30:44 +09:00
sparc sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
tile ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
um Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-20 18:05:28 -08:00
unicore32 ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
x86 perf/urgent fixes: 2013-01-22 14:32:07 -08:00
xtensa These are a few cleanups for asm-generic: 2012-12-21 16:39:08 -08:00
.gitignore
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-20 18:05:28 -08:00