linux-kernel - Re: [PATCH v4 6/8] i2c: designware: Use PCI PSP driver for communication

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Date:   Mon, 13 Mar 2023 12:30:09 +0200
From:   Jarkko Nikula <jarkko.nikula@...ux.intel.com>
To:     Mario Limonciello <mario.limonciello@....com>,
        Jan Dąbroś <jsd@...ihalf.com>,
        Grzegorz Bernacki <gjb@...ihalf.com>, Rijo-john.Thomas@....com,
        Thomas.Lendacky@....com, herbert@...dor.apana.org.au,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Felix.Held@....com, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 6/8] i2c: designware: Use PCI PSP driver for
 communication

On 3/10/23 23:19, Mario Limonciello wrote:
> 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.
> 
> Acked-by: Tom Lendacky <thomas.lendacky@....com>
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> ---
> v3->v4:
>   * Pick up tags
> v1->v2:
>   * Fix Kconfig to use imply
>   * Use IS_REACHABLE
> ---
>   drivers/i2c/busses/Kconfig                  |   2 +-
>   drivers/i2c/busses/i2c-designware-amdpsp.c  | 142 ++------------------
>   drivers/i2c/busses/i2c-designware-core.h    |   1 -
>   drivers/i2c/busses/i2c-designware-platdrv.c |   1 -
>   include/linux/psp-platform-access.h         |   1 +
>   5 files changed, 11 insertions(+), 136 deletions(-)
> 
For the i2c-designware parts:

Acked-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>