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608fa5efd8
Fix master i2c when sending partial transfers using I2C_XFER_START and I2C_XFER_STOP. BUG=none BRANCH=none TEST=Tested i2c transfers on oak. tested transfers with I2C_XFER_SINGLE (I2C_XFER_START | I2C_XFER_STOP) and tested partial transfers with just one flag. For partial transfers I tested two different types: - i2c_xfer START only transmitting, then another i2c_xfer with more trasnmitting followed by a STOP. verified with logic analyzer that there is not restart in the middle. - i2c_xfer START with transmitting and receiving, then another i2c_xfer with more receiving followed by a STOP. verified with logic analyzer that there is one restart in between transmitting and receving and no restart in between the two calls to i2c_xfer. Change-Id: Ie4146d1cf7d39f7dc56fd02e65add6bf02772e67 Signed-off-by: Alec Berg <alecaberg@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/272690 Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit