linux-kernel - Re: [PATCH v2 0/6] Introduce initial support for the AMD I3C (non-HCI) to DW driver

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Message-ID: <990cdc00-92e2-41fb-bbcb-26f413b97494@amd.com>
Date: Tue, 29 Oct 2024 20:45:27 +0530
From: Shyam Sundar S K <Shyam-sundar.S-k@....com>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>,
 Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Cc: Sanket.Goswami@....com, linux-i3c@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/6] Introduce initial support for the AMD I3C
 (non-HCI) to DW driver

Hi Jarkko,

On 10/23/2024 11:21, Shyam Sundar S K wrote:
> The AMD EPYC platform design has DIMMs connected over the I3C bus, with
> each DIMM containing three components: SPD, PMIC, and RCD.
> 
> To access component-specific information within the DIMMs, such as initial
> dynamic address, static address, and provisional ID, ACPI support is
> necessary for the I3C core. This requires adding ACPI binding to the
> dw-i3c-master driver and retrieving slave information from the AMD ASL.
> 
> Currently, the code is closely tied to dt-bindings. This initial set aims
> to decouple some of these bindings by adding the AMD-specific _HID,
> enabling the current driver to support ACPI-enabled x86 systems.
> 
> In this series, support for following features has been added.
> - X86/ACPI support to i3c core
> - Support for SETAASA CCC command
> - Add routines to plugin a SPD device to the i3c bus
> - Workaround for AMD hardware
> - Add dw-i3c-master driver with ACPI bindings
> 
> 

Any feedback on this series, please?

Thanks,
Shyam

> v2:
> ----
>  - Address LKP reports issues
> 
> Shyam Sundar S K (6):
>   i3c: dw: Add support for AMDI0015 ACPI ID
>   i3c: dw: Use IRQF_SHARED flag for dw-i3c-master
>   i3c: master: Add ACPI support to i3c subsystem
>   i3c: master: Add a routine to include the I3C SPD device
>   i3c: master: Add support for SETAASA CCC
>   i3c: dw: Add quirk to address OD/PP timing issue on AMD platform
> 
>  drivers/i3c/internals.h            |   2 +
>  drivers/i3c/master.c               | 157 ++++++++++++++++++++++++++++-
>  drivers/i3c/master/dw-i3c-master.c |  44 +++++++-
>  drivers/i3c/master/dw-i3c-master.h |   1 +
>  include/linux/i3c/ccc.h            |   1 +
>  include/linux/i3c/master.h         |   2 +
>  6 files changed, 205 insertions(+), 2 deletions(-)
>