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When we find that charging is in a wedged state, we may wish to write a PD log entry, but the PD MCU cannot detect such a state on its own. Therefore, add a new command to ask the PD MCU to write a log of a given type, and add a new board-specific custom log event. BUG=chrome-os-partner:36668 TEST=Manual on samus: ./ectool --dev=1 pdwritelog charge 0 ./ectool --dev=1 pdwritelog charge 1 ./ectool --dev=1 pdwritelog 1 0 ./ectool --dev=1 pdwritelog 2 0 ./ectool --dev=1 pdlog Verify log output matches expectation: 2015-02-12 11:12:49.290 P0 SRC 2015-02-12 11:12:49.296 P1 SNK Charger PD 20286mV max 20000mV / 3000mA 2015-02-12 11:12:49.303 P0 New connection 2015-02-12 11:12:49.310 P0 Board-custom event --- END OF LOG -- Also, verify kernel logging of wedged event: [ 181.378420] PDLOG 2015/02/12 19:13:44.019 P0 Event 02 (0000) [] Also, trigger wedged state on Samus and verify log entry is written. BRANCH=Samus Change-Id: I55c7c839cf8300fcd3931dccdaaf16c1065e31a8 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/248981 Reviewed-by: Alec Berg <alecaberg@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit