Shawn Nematbakhsh 67759f3553 virtual_battery: Remove direct i2c access ...

Virtual battery implements a smart battery interface, but the actual
battery on the system may speak a different protocol. Support such
batteries by removing direct i2c access from the virtual battery driver.
Fetch data from storage when available, and call generic battery
routines when not.

BUG=chromium:717753
BRANCH=None
TEST=Manual on kevin, boot and verify "Unhandled VB reg" prints are not
seen. Verify by-eye that all regs in cros 4.4 kernel sbs-battery.c are
handled (except REG_MANUFACTURER_DATA). Verify that sysfs manufacturer,
model name, time_to_full_avg and time_to_empty_avg values are all sane.

Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: Ia8fc0a80ac7576fa8bdcc3b7dac0609d9d754234
Reviewed-on: https://chromium-review.googlesource.com/547004
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>

2017-07-05 14:24:49 -07:00

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