li feng 5b2e673948 i2c: Retry i2c operation if fails on nack'd(EC_ERROR_BUSY).
Retry count is defined by CONFIG_I2C_NACK_RETRY_COUNT.

BUG=chrome-os-partner:37494
TEST=Tested on Cyan, observed retry happens on nack'd i2c.
BRANCH=None

Signed-off-by: li feng <li1.feng@intel.com>
Change-Id: I73ed15a52335de6c5a5b647660bfe431a8238716
Reviewed-on: https://chromium-review.googlesource.com/274689
Reviewed-by: Shawn N <shawnn@chromium.org>
Commit-Queue: Divya Jyothi <divya.jyothi@intel.com>
Tested-by: Divya Jyothi <divya.jyothi@intel.com>
2015-06-04 20:51:07 +00:00
2015-05-07 00:00:47 +00:00
2015-06-03 22:27:45 +00:00
2014-03-31 22:45:09 +00:00
2012-05-11 09:11:52 -07:00
2014-04-02 19:58:53 +00:00
2014-05-15 05:20:14 +00:00

For an overview of the Embedded Controller firmware, refer to

http://www.chromium.org/chromium-os/2014-firmware-summit
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