the following patch was just integrated into master: commit 80d99aef700d334f2b59f1f786c1910628ded86d Author: Aaron Durbin adurbin@chromium.org Date: Thu Oct 10 20:54:57 2013 -0500
baytrail: add reset support
Bay Trail has the following types of resets it supports: - Soft reset (INIT# to cpu) - write 0x1 to I/O 0x92 - Soft reset (INIT# to cpu)- write 0x4 to I/0 0xcf9 - Cold reset (S0->S5->S0) - write 0xe to I/0 0xcf9 - Warm reset (PMC_PLTRST# assertion) - write 0x6 to I/O 0xcf9 - Global reset (S0->S5->S0 with TXE reset) - write 0x6 or 0xe to 0xcf9 but with ETR[20] set.
While these are documented this support currently provides support for 2nd soft reset as well as cold and warm reset.
BUG=chrome-os-partner:23249 BRANCH=None TEST=Built and booted.
Change-Id: I9746e7c8aed0ffc29e7afa137798e38c5da9c888 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/172710 Reviewed-by: Shawn Nematbakhsh shawnn@chromium.org
See http://review.coreboot.org/4878 for details.
-gerrit