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| author |   Terry Bowman <terry.bowman@amd.com> | 2022-02-09 11:27:16 -0600 |
|---|---|---|
| committer |   Wolfram Sang <wsa@kernel.org> | 2022-02-11 15:38:22 +0100 |
| commit | 381a3083c6747ae5cdbef9b176d57d1b966db49f (patch) | |
| tree | 2ae1ec4f0f3e67bc8906baea656a1b9f9e242af9 /lib | |
| parent | i2c: piix4: Add EFCH MMIO support to SMBus base address detect (diff) | |
| download | linux-dev-381a3083c6747ae5cdbef9b176d57d1b966db49f.tar.xz linux-dev-381a3083c6747ae5cdbef9b176d57d1b966db49f.zip | |
i2c: piix4: Add EFCH MMIO support for SMBus port select
AMD processors include registers capable of selecting between 2 SMBus
ports. Port selection is made during each user access by writing to
FCH::PM::DECODEEN[smbus0sel]. Change the driver to use MMIO during
SMBus port selection because cd6h/cd7h port I/O is not available on
later AMD processors.
Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions