mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-01 21:02:27 +00:00
f28f2b2e51
Open drain cleanup minimizes leakage and signal glitching on shared reset/signal lines, and is tidier than explicitly switching the signals between inputs/outputs. Touchscreen and lightbar are powered by +5VALW so their signals need to be dropped when +5VALW is off to avoid leakage, and so they see a clean reset signal when they're powered up. Moved +5VALW power-on to S5-S3 transition, to minimize power draw in S5. This also ensures that 5VALW-powered devices get reset when the device bounces through S5. (No effect on proto1, where 5VALW is not under EC control.) Signed-off-by: Randall Spangler <rspangler@chromium.org> BUG=chrome-os-partner:9172 TEST=boot and shutdown system; still works. Change-Id: Ia4bf0703292a189c324ce283d1e79a33776ee40f
- EC Lib
This wraps Blizzard driverlib and implements the EC chip interface defined
by Google. See below diagram for architecture.
+--------------------+
| Host BIOS/OS |
+--------------------+
---- host interface ----
+--------------------+
| Google EC features |
+--------------------+
---- chip interface ---- The interface is defined in
src/platform/ec/chip_interface/*.
+--------------------+ But the real implementation is in EC Lib.
| EC Lib |
+--------------------+
| Blizzard low level |
| driver, the |
| driverlib. |
+--------------------+