From: Jean Pihet <j-pihet@xxxxxx>
Use the PM QOS framework to set wake-up latency constraints on the MPU and DMA.
Cpuidle for OMAP34xx uses PM QOS to retreive the strongest constraint and to
determine the next state for the MPU and CORE power domains.
As of today only I2C is requesting a constraint, but every omap_device
should be able to do so.
Note: To be replaced by a more generic solution which allows every
device to put a constraint, and which can control all power
domains in the system. This solution is currently under
investigation.
Jean Pihet (3):
OMAP PM: create a PM layer plugin for the devices wakeup latency
constraints
OMAP: implement MPU and DMA wake-up constraints using PM_QOS
OMAP: use PM QOS for wake-up constraints from I2C
arch/arm/plat-omap/Kconfig | 7 +
arch/arm/plat-omap/Makefile | 1 +
arch/arm/plat-omap/i2c.c | 22 ++-
arch/arm/plat-omap/include/plat/omap-pm.h | 96 ++++---
arch/arm/plat-omap/include/plat/omap_device.h | 1 +
arch/arm/plat-omap/omap-pm-constraints.c | 349 +++++++++++++++++++++++++
arch/arm/plat-omap/omap-pm-noop.c | 70 +++---
7 files changed, 469 insertions(+), 77 deletions(-)
create mode 100644 arch/arm/plat-omap/omap-pm-constraints.c
--
1.7.2.3
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