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This command wedges the I2C bus by writing part of a byte to or reading part
of the response from the slave device.
To enabled the wedge command you must define CONFIG_CMD_I2CWEDGE and you must
define I2C_PORT_HOST, the i2c port to use the wedge command.
BUG=chrome-os-partner:19286
TEST=Manual test on peach pit, spring, and glimmer. Define config in board.h
to enable the command:
On the EC console, execute the following "i2cwedge" command
i2cwedge 0x90 0 1 (wedge write)
or
i2cwedge 0x90 0 2 (wedge read)
and then "battery". Observe that the command reports an error.
Similarly, execute
i2cwedge 0x90 0 5 (wedge write + reboot)
or
i2cwedge 0x90 0 6 (wedge read + reboot)
on the EC console and observe a reboot. Then execute "battery" and observe
that the command works properly.
BRANCH=none
Change-Id: I10ccb21b047df907a4dfdbd84c0f582cfa2d939a
Signed-off-by: Hung-ying Tyan <tyanh@chromium.org>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/66389
Tested-by: Alec Berg <alecaberg@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Alec Berg <alecaberg@chromium.org>
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