mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-10 17:41:54 +00:00
7d2b50f641
When the uart rx signal is not externally pulled high by the EC or AP, the low rx signal triggers thousands of uart interrupts. At initialization Cr50 does not know the state of those devices. If the uart is initialized when the device is off these interrupts may prevent Cr50 from booting on certain boards. This change does not enable the uart until the device state is know. When the device state monitoring detects that the AP or EC is powered on it will enable uart 1 or 2 and when it detects that it is powered off then the uart will be disabled. BUG=none BRANCH=none TEST=UART_CTRL registers are set to 0 for uart 1 and 2, and are changed to 3 when the device state is on. Change-Id: I43e847c6abb8507a86de92a5c226a79f3add7f97 Signed-off-by: Mary Ruthven <mruthven@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/360026 Reviewed-by: Scott Collyer <scollyer@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly