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i2c: designware: Use PCI PSP driver for communication

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Currently the PSP semaphore communication base address is discovered
by using an MSR that is not architecturally guaranteed for future
platforms.  Also the mailbox that is utilized for communication with
the PSP may have other consumers in the kernel, so it's better to
make all communication go through a single driver.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Mark Hasemeyer <markhas@chromium.org>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Mark Hasemeyer <markhas@chromium.org>
Acked-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Mario Limonciello
2023-04-14 09:40:07 -05:00
committed by Herbert Xu
parent 1560541631
commit 440da737cf
5 changed files with 29 additions and 153 deletions
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1
include/linux/psp-platform-access.h
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@@ -7,6 +7,7 @@
enum psp_platform_access_msg {
PSP_CMD_NONE = 0x0,
PSP_I2C_REQ_BUS_CMD = 0x64,
};
struct psp_req_buffer_hdr {