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x86, olpc: Add XO-1 suspend/resume support

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Add code needed for basic suspend/resume of the XO-1 laptop.
Based on earlier work by Jordan Crouse, Andres Salomon, and others.

This patch incorporates all earlier feedback from Thomas Gleixner. To
clarify a certain point (now more obvious in the code itself):
On resume, OpenFirmware returns execution to Linux in protected mode
with a kernel-compatible GDT already set up. The changes and
simplifications suggested have all been included.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Link: http://lkml.kernel.org/r/1309019658-1712-5-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 17:34:11 +01:00
committed by H. Peter Anvin
parent a3128588b3
commit 97c4cb71c1
6 changed files with 234 additions and 6 deletions
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3
include/linux/cs5535.h
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@@ -70,6 +70,9 @@
#define CS5536_PM1_CNT 0x08
#define CS5536_PM_GPE0_STS 0x18
/* CS5536_PM1_EN bits */
#define CS5536_PM_PWRBTN (1 << 8)
/* VSA2 magic values */
#define VSA_VRC_INDEX 0xAC1C
#define VSA_VRC_DATA 0xAC1E