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| author | Mike Dunn <mikedunn@newsguy.com> | 2013-06-18 11:08:50 -0700 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2013-06-22 15:25:28 +0200 |
| commit | 0dc0e846f3634fcc728f086ae1b7a4b76294e4c9 (patch) | |
| tree | c4c817d7b7146e1a6b7dbcabcd76bd5625a4d31f /MAINTAINERS | |
| parent | fbf87b1823dd5ebc2a384711ea2c677543019ece (diff) | |
| download | u-boot-0dc0e846f3634fcc728f086ae1b7a4b76294e4c9.tar.gz u-boot-0dc0e846f3634fcc728f086ae1b7a4b76294e4c9.tar.bz2 u-boot-0dc0e846f3634fcc728f086ae1b7a4b76294e4c9.zip | |
pxa: add support for palmtreo680 board
This patch adds support for the Palm Treo 680 smartphone. A quick overview of
u-boot implementation on the treo 680...
The treo 680 has a Diskonchip G4 nand flash chip. This device has a 2k region
that maps to the system bus at the reset vector in a NOR-like fashion so that it
can be used as the boot device. The phone is shipped with this 2k region
configured as write-protected (can't be modified) and programmed with an initial
program loader (IPL). At power-up, this IPL loads the contents of two flash
blocks to SDRAM and jumps to it. The capacity of the two blocks is not large
enough to hold all of u-boot, so a u-boot SPL is used. To conserve flash space,
these two blocks and the necessary number of subsequent blocks are programmed
with a concatenated spl + u-boot image. That way, the IPL will also load a
portion of u-boot proper, and when the spl runs, it relocates the portion of
u-boot that the IPL has already loaded, and then resumes loading the remaining
part of u-boot before jumping to it.
The default_environment is used (CONFIG_ENV_IS_NOWHERE) because I didn't think
that having a writable environment was worth the cost of a flash block, although
adding it would be straightforward. I abuse the CONFIG_EXTRA_ENV_SETTINGS
option to specify the usbtty for the console (CONFIG_SYS_CONSOLE_IS_IN_ENV).
Support for the LCD is included, but currently it is only useful for displaying
the u-boot splash screen. But if u-boot is built without the usbtty console, it
does display the auto-boot progress nicely.
Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Diffstat (limited to 'MAINTAINERS')
| -rw-r--r-- | MAINTAINERS | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 7820375e9c..9abff0a982 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -651,6 +651,9 @@ Wolfgang Denk <wd@denx.de> imx27lite i.MX27 qong i.MX31 +Mike Dunn <mikedunn@newsguy.com> + palmtreo680 pxa270 + Kristoffer Ericson <kristoffer.ericson@gmail.com> jornada SA1110 |