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aa2db4401174e138fc0adcfcf9f5be3b1d778348
Create two state machines SMB_WRITE_SUSPEND and SMB_READ_SUSPEND to handle i2c master stall bus and call i2c_xfer again. Notice we should disable i2c interrupt since cannot read/write SDA reg to clear interrupt pending bit. Modified drivers: 1. i2c.c: Modified to handle calling i2c_xfer twice or more. BUG=chrome-os-partner:34346 TEST=make buildall -j; test nuvoton IC specific drivers BRANCH=none Change-Id: I781f6f8227867ea9c0e265b3064f48602c0f5f07 Signed-off-by: Mulin Chao <mlchao@nuvoton.com> Reviewed-on: https://chromium-review.googlesource.com/309381 Reviewed-by: Randall Spangler <rspangler@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit
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