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The ISL9238 has functionality for a input voltage regulation loop. By default, the regulation reference voltage is set to 4096mV, however we can be kinder to chargers by raising this regulation reference. In testing, there appears to be insignificant change in current pulled at the higher limit. BUG=b:67964166 BRANCH=None TEST=Flash a board with a ISL9238, verify that 0x4b reads as 0x0d00. TEST=make -j buildall Change-Id: I920c4b922106fca3001f2759cad0479a368f735b Signed-off-by: Aseda Aboagye <aaboagye@google.com> Reviewed-on: https://chromium-review.googlesource.com/745527 Commit-Ready: Aseda Aboagye <aaboagye@chromium.org> Tested-by: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Shawn N <shawnn@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