Re: [PATCH -v2] ACPI, PM, Specify lowest allowed state for device sleep state

On 05/17/2012 09:45 PM, Huang Ying wrote:

Lower device sleep state can save more power, but has more exit
latency too.  Sometimes, to satisfy some power QoS and other
requirement, we need to constrain the lowest device sleep state.

In this patch, a parameter to specify lowest allowed state for
acpi_pm_device_sleep_state is added.  So that the caller can enforce
the constraint via the parameter.

This is needed by PCIe D3cold support, where the lowest power state
allowed may be D3_HOT instead of default D3_COLD.

Changelog:

v2:
- Minor change per Rafeal's comments

Signed-off-by: Huang Ying <redacted>
---
 drivers/acpi/sleep.c       |   24 +++++++++++++++++++-----
 drivers/pci/pci-acpi.c     |    3 ++-
 drivers/pnp/pnpacpi/core.c |    4 ++--
 include/acpi/acpi_bus.h    |    6 +++---
 4 files changed, 26 insertions(+), 11 deletions(-)

Applied.

thanks,
Len Brown, Intel Open Source Technology Center