li feng 39efbc3ada ish i2c: add I2C Fast Mode Plus 1Mbps speed option
Also added CONFI_ISH_I2C_PORT0_SPEED, CONFI_ISH_I2C_PORT1_SPEED, and
CONFI_ISH_I2C_PORT2_SPEED to define speed for each ISH I2C port. By
default, those are set to fast mode, 400kbps, I2C_SPEED_FAST.
The values can be modified in board.h.

BUG=None
BRANCH=None
TEST=On Soraka modified board for ISH, set I2C stardard mode, fast mode
and fast mode plus, measured I2C clock freq using scope respectively and
confirmed the freq matched I2C mode.

Change-Id: I426b50dc935c3760903360a50f6069e99bd0abff
Signed-off-by: li feng <li1.feng@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/784091
Commit-Ready: Li1 Feng <li1.feng@intel.com>
Tested-by: Li1 Feng <li1.feng@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
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2014-04-02 19:58:53 +00:00
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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
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