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d536724cf5
During shutdown sequence sensor rails can be powered down asynchronously
to the EC hence EC cannot interlock the sensor states with the power down
states. To avoid this issue, defer switching the sensors rate with a
configurable delay if in S3. By the time deferred function is serviced,
if the chipset is in S5 we can back out from switching the sensor rate.
BUG=chrome-os-partner:61489
BRANCH=none
TEST=Manually tested on Electro. Put the device in S5 and observed
no I2C errors printed on EC the console.
Change-Id: I40b75ebbf0d05fafffdfd535962423c3960fafbf
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/433338
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly