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x86: olpc: add One Laptop Per Child architecture support

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This adds support for OLPC XO hardware.  Open Firmware on XOs don't contain
the VSA, so it is necessary to emulate the PCI BARs in the kernel.  This also
adds functionality for running EC commands, and a CONFIG_OLPC.

A number of OLPC drivers depend upon CONFIG_OLPC.

olpc_ec_timeout is a hack to work around Embedded Controller bugs.

[[email protected]: build fix]
[[email protected]: geode_has_vsa build fix]
[[email protected]: olpc_register_battery_callback doesn't exist]
Signed-off-by: Andres Salomon <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jordan Crouse <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andres Salomon 2008-04-29 00:59:53 -07:00 • committed by Linus Torvalds
commit 3ef0e1f8ca
10 changed files with 736 additions and 3 deletions
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7
Documentation/kernel-parameters.txt
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@ -1389,6 +1389,13 @@ and is between 256 and 4096 characters. It is defined in the file
nr_uarts= [SERIAL] maximum number of UARTs to be registered.
olpc_ec_timeout= [OLPC] ms delay when issuing EC commands
Rather than timing out after 20 ms if an EC
command is not properly ACKed, override the length
of the timeout. We have interrupts disabled while
waiting for the ACK, so if this is set too high
interrupts *may* be lost!
opl3= [HW,OSS]
Format: <io>