Vincent Palatin 9d38e46641 ectool: add servo v2 spi support ...

Add a new transport for ectool to send host command V3 over the Servo v2
SPI interface using libftdi.

Build this new communication mechanism only for the 'build' architecture
as it has a dependency on libftdi, the new ectool binary is called
ectool_servo.
Fix the 'build' tools build if they don't have a source file matching
their binary name.

The serial number of the servo board can be passed in the 'name'
parameter, e.g. :
sudo ectool_servo --name=905537-00474 version

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=none
BUG=b:70320279
TEST=with ZerbleBarn connected to a servo V2, run:
sudo ectool_servo version

Change-Id: Ia7067d465a42f76695fed5932f32fac9a6d0988e
Reviewed-on: https://chromium-review.googlesource.com/864164
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>

2018-01-17 06:20:37 -08:00

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