i2c: Fall back to emulated SMBus if the operation isn't supported natively
authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Tue, 24 Jul 2012 12:13:59 +0000 (14:13 +0200)
committerJean Delvare <khali@endymion.delvare>
Tue, 24 Jul 2012 12:13:59 +0000 (14:13 +0200)
commit72fc2c7f78b0c365454e60ad33b0e74aea43e3ab
treeb4416754f881f49b0e4cdb3585ed1f598c5a6c56
parentd47726c52122d64253ae56e0fafdb7d0b954e97c
i2c: Fall back to emulated SMBus if the operation isn't supported natively

Adapter drivers might support only a subset of the SMBus operations
natively. Those drivers currently have to manually emulate unsupported
operations using I2C.

Make the i2c_smbus_xfer() function fall back to
i2c_smbus_xfer_emulated() when the adapter's .smbus_xfer() operation
returns -EOPNOTSUPP, like it already does when the .smbus_xfer()
operation isn't available at all.

[JD: Minor optimization.]

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
drivers/i2c/i2c-core.c