linux-kernel - [PATCH -next 0/2] Add i2c arbitration support for new SoCs

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Message-Id: <20220916131854.687371-1-jsd@semihalf.com>
Date:   Fri, 16 Sep 2022 15:18:52 +0200
From:   Jan Dabros <jsd@...ihalf.com>
To:     linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
        jarkko.nikula@...ux.intel.com, andriy.shevchenko@...ux.intel.com
Cc:     wsa@...nel.org, rrangel@...omium.org, upstream@...ihalf.com,
        mario.limonciello@....com, jsd@...ihalf.com
Subject: [PATCH -next 0/2] Add i2c arbitration support for new SoCs

This patchset comprises changes into i2c-designware-amdpsp.c module
which aims to add support for new SoCs, while keep backward
compatibility with Cezanne platforms.

Beside new algorithm introduced for the PSP-x86 communication, it also
switches from MSR/MMIO access to SMN (System Management Network) since
only the latter is working on both old new revisions of SoCs.

Jan Dabros (2):
  i2c: designware: Switch from using MMIO access to SMN access
  i2c: designware: Add support for new SoCs in AMDPSP driver

 arch/x86/include/asm/amd_nb.h               |   1 +
 arch/x86/kernel/amd_nb.c                    |   3 +-
 drivers/i2c/busses/i2c-designware-amdpsp.c  | 199 +++++++++++++-------
 drivers/i2c/busses/i2c-designware-core.h    |   1 -
 drivers/i2c/busses/i2c-designware-platdrv.c |   1 -
 5 files changed, 134 insertions(+), 71 deletions(-)

-- 
2.37.3.968.ga6b4b080e4-goog