OpenCellular

mirror of https://github.com/Telecominfraproject/OpenCellular.git synced 2026-01-08 16:41:55 +00:00

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Bill Richardson 2f327fbfa6 samus: Use analog BAT_TEMP as presence indicator

There is an analog temperature line on the Samus battery connector. We don't
yet know what it means, but there's a pull-up on it, so if it's reading
close to ADC_READ_MAX, we can probably assume there's no battery.

This change says that any reading within 90% of ADC_READ_MAX means the
battery pack is not present, so we can go ahead and boot without trying to
wake it up first.

BUG=chrome-os-partner:23449
BRANCH=none
TEST=manual

Connect the battery, boot. It should happen quickly.
Disconnect the battery, boot. It should STILL happen quickly.

Running "adc" on the EC console should show an entry for "BatteryTemp". If
no battery is connected, it should read somewhere close to 4095.

Change-Id: I1e41bccb2a988d34de09192ebb0a68b91b1b0b24
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/174046
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>

2013-10-22 21:41:09 +00:00

bds

cleanup: Replace awkward I2C_PORTS_USED macro with constant

2013-10-07 16:20:59 +00:00

bolt

bolt: Implement prochot

2013-10-22 01:13:40 +00:00

daisy

cleanup: Consolidate power interrupts

2013-10-21 21:10:36 +00:00

discovery

Correct the EC name in the build.mk comments for some boards