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| /openbmc/linux/drivers/i2c/busses/ |
| H A D | i2c-piix4.c | diff 46967bc1ee93acd1d8953c87dc16f43de4076f93 Wed Feb 09 11:27:15 CST 2022 Terry Bowman <terry.bowman@amd.com> i2c: piix4: Add EFCH MMIO support to SMBus base address detect
The EFCH SMBus controller's base address is determined using details in
FCH::PM::DECODEEN[smbusasfiobase] and FCH::PM::DECODEEN[smbusasfioen].These
register fields were accessed using cd6h/cd7h port I/O. cd6h/cd7h port I/O
is no longer available in later AMD processors. Change base address
detection to use MMIO instead of port I/O cd6h/cd7h.
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>
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