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timer: Add generic udelay() implementation

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Add GENERIC_UDELAY Kconfig option so that a generic
udelay() implementation is provided utilizing the
monotonic timer. That way each board/chipset doesn't
need to duplicate the same udelay(). Additionally,
assume that GENERIC_UDELAY implies init_timer()
is not required.

BUG=None
BRANCH=None
TEST=Built nyan, ryu, and rambi. May need help testing.

Change-Id: I7f511a2324b5aa5d1b2959f4519be85a6a7360e8
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 1a85fbcad778933d13eaef545135abe7e4de46ed
Original-Change-Id: Idd26de19eefc91ee3b0ceddfb1bc2152e19fd8ab
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/219719
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9334
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Aaron Durbin
2014-09-25 10:05:15 -05:00
committed by Patrick Georgi
parent 23b4e4c4e8
commit e5e36306a9
19 changed files with 24 additions and 240 deletions
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7
src/Kconfig
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@@ -360,6 +360,13 @@ config HAVE_MONOTONIC_TIMER
help
The board/chipset provides a monotonic timer.
config GENERIC_UDELAY
def_bool n
depends on HAVE_MONOTONIC_TIMER
help
The board/chipset uses a generic udelay function utilizing the
monotonic timer.
config TIMER_QUEUE
def_bool n
depends on HAVE_MONOTONIC_TIMER