msm: cpr-regulator: add CPR driver for APC
RBCPR (RapidBridge Core Power Reduction) is a technology to reduce
core power on a cpu or a core. It takes voltage suggestions in efuse
from product test process as initial settings. It supports "corner"
vote mechanism and converts corner value to voltage before writing
to a voltage regulator API, such as that provided by spm-regulator
driver.
This patch only adds basic code as a regulator driver and to support
efuse reading and initial voltage settings for corners. CPR support
will be added in a separate patch.
Change-Id: I98896fb00e9864d849498d0446cd2aae4af95f58
Signed-off-by: Willie Ruan <wruan@codeaurora.org>
5 files changed