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Previously the STM32F3 support was non-functional due to it being a cut and paste of the STM32F0, and the clocks are not set up the same way on the two platforms. Also, the STM32F initialization code was incorrectly calling the F0/L buad rate setup code. This change has the variant specific USART code pass the input frequency to the baud rate divisor clock to the baud rate setup code, instead of that code calling clock_get_freq() to determine the input clock frequency. This is required because the STM32F3 is not configured such that the clock_get_freq value and the input to the USART baud rate divisor match. Signed-off-by: Anton Staaf <robotboy@chromium.org> BRANCH=None BUG=None TEST=make buildall -j Verify USART works on discovery as well as Ryu Change-Id: I71248d83b53969d0e7020747a9bb9570803f30ac Reviewed-on: https://chromium-review.googlesource.com/250920 Reviewed-by: Vic Yang <victoryang@chromium.org> Trybot-Ready: Anton Staaf <robotboy@chromium.org> Tested-by: Anton Staaf <robotboy@chromium.org> Commit-Queue: Anton Staaf <robotboy@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit