[PATCH 0/5] OMAP: cpuidle code clean-up
jean.pihet at newoldbits.com
jean.pihet at newoldbits.com
Fri Apr 29 05:26:21 EDT 2011
From: Jean Pihet <j-pihet at ti.com>
Rework the cpuidle code:
- optimize the cpuidle C-states data registration and storage,
- change the interaction with the debugfs 'enable_off_mode' knob
and the use of the C-states 'valid' internal field,
- remove dead code,
- improve code readability.
Tested on Beagleboard B5 with cpuidle in RET and OFF modes.
Another 161 lines of OMAP code gone ;p
Notes:
1) the debugfs 'enable_off_mode' knob will be deprecated by the use
of the devices constraints framework to restrict the power domains
power modes.
2) the MPU and CORE power domains low power modes are controlled
by cpuidle, based on the allowed overall sleep+wake-up latencies
and the wake-up latency constraints on the MPU. This is incorrect.
The devices constraints framework shall be used instead to control
all power domains.
ToDo:
- integrate cpuidle with the devices constraints framework, when merged in,
- refine the latency figures and express them in term of available data
from other frameworks (OMAP PM, constaints framework, omap_devices,
new VC/VP voltage and DVFS code ...),
Jean Pihet (5):
OMAP3 cpuidle: remove useless SDP specific timings
OMAP3: clean-up mach specific cpuidle data structures
OMAP3: cpuidle: re-organize the C-states data
OMAP3: cpuidle: code rework for improved readability
OMAP3: cpuidle: change the power domains modes determination logic
arch/arm/mach-omap2/board-3430sdp.c | 19 --
arch/arm/mach-omap2/board-rx51.c | 15 +-
arch/arm/mach-omap2/cpuidle34xx.c | 424 ++++++++++++-----------------------
arch/arm/mach-omap2/pm.h | 17 +-
arch/arm/mach-omap2/pm34xx.c | 12 -
5 files changed, 163 insertions(+), 324 deletions(-)
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