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x86, olpc: Add XO-1.5 SCI driver

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Add a driver for the ACPI-based EC event interface found on the
OLPC XO-1.5 laptop. This enables notification of battery/AC power events,
and enables various devices to be used as wakeup sources through regular
ACPI mechanisms.

This driver can't be built as a module, because some drivers need to know
at boot-time if SCI-based functionality is available via
olpc_ec_wakeup_available().

Signed-off-by: Daniel Drake <dsd@laptop.org>
Link: http://lkml.kernel.org/r/1309019658-1712-12-git-send-email-dsd@laptop.org
Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Daniel Drake
2011-06-25 17:34:18 +01:00
committed by H. Peter Anvin
parent cfee95977b
commit a0f30f592d
4 changed files with 187 additions and 0 deletions
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9
arch/x86/platform/olpc/olpc.c
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@@ -222,6 +222,15 @@ bool olpc_ec_wakeup_available(void)
return true;
#endif
/*
* XO-1.5 EC wakeups are available when olpc-xo15-sci driver is
* compiled in
*/
#ifdef CONFIG_OLPC_XO15_SCI
if (olpc_platform_info.boardrev >= olpc_board_pre(0xd0)) /* XO-1.5 */
return true;
#endif
return false;
}
EXPORT_SYMBOL_GPL(olpc_ec_wakeup_available);