li feng 1c7baaf71f I2C: i2c_raw_mode() should only touch I2C port specified ...

After I2C unwedge, *all* I2C ports will be re-initialized in
i2c_raw_mode() by gpio_config_module(MODULE_I2C, 1);
This means *all* I2C pins will be programmed as	GPIO then enable I2C
alternate function.

If I2C Unwedge happened while there is an active I2C transacation on
another port, the active I2C transaction will be corrupted, since the
pins will be temporary programmed as GPIO Output High.

BUG=chrome-os-partner:40519
TEST=Warm-reboot test on Cyan EVT and no discharging while AC is on.
BRANCH=none

Change-Id: I3be1d5c60bf4ab385bc077202406ec7abd8b2add
Signed-off-by: li feng <li1.feng@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/287493
Reviewed-by: Shawn N <shawnn@chromium.org>
Commit-Queue: Denny Iriawan <denny.iriawan@intel.com>

2015-07-25 14:49:31 +00:00

6.4 KiB

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