On Sun, Nov 15, 2015 at 12:33:03PM +0100, Christian Fetzer wrote:
> The SB800 chipset supports a multiplexed main SMBus controller with
> four ports. The multiplexed ports share the same SMBus address and
> register set. The port is selected by bits 2:1 of the smb_en register
> (0x2C).
> Only one port can be active at any point in time therefore a mutex is
> needed in order to synchronize access.
> Additionally, the commit avoids requesting and releasing the SMBus base
> address index region on every multiplexed transfer by moving the
> request_region call into piix4_probe.
> Tested on HP ProLiant MicroServer G7 N54L (where this patch adds
> support to access sensor data from the w83795adg).
> Cc: Thomas Brandon <tbrando...@gmail.com>
> Cc: Eddi De Pieri <e...@depieri.net>
> Signed-off-by: Christian Fetzer <fetzer...@gmail.com>

Reviewed-by: Mika Westerberg <mika.westerb...@linux.intel.com>
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