Re: [PATCH v3 00/13] Support ACPI and SETAASA device discovery

[Alexandre Belloni <alexandre.belloni@bootlin.com>]

Hello,

On 23/04/2026 14:26:59+0530, Akhil R wrote:
> This patch series adds SETAASA device discovery to the I3C subsystem,
> enabling support for SPD5118 temperature sensors found on DDR5 memory
> modules. The changes also add ACPI support for all existing DAA
> methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus.
> 
> SPD5118 and similar devices on DDR5 memory modules differ from typical
> I3C devices in their initialization. They use SETAASA broadcast CCC
> instead of ENTDAA for address assignment, and per JEDEC specification,
> are not required to have a Provisioned ID or implement standard device
> information CCC commands (GETPID, GETDCR, GETBCR).
> 
> The series enables to describe all I3C and I2C devices on both Device
> Tree and the ACPI table, using unified device property APIs throughout
> the I3C core and the Synopsys DesignWare I3C master driver.
> 
> Please note that the series modifies drivers across multiple subsystems,
> like Device Tree bindings, ACPI, I3C and HWMON.
> 
> v2->v3:
>   * Fix maximum value and indent bit list for mipi-i3c-static-method.
>   * Move I3C_ADDR_METHOD_* macros to dt-bindings header.
>   * Drop ACPICA commit IDs, keep only the Link: tags.
>   * Revert the change which proceeds to register other devices if SETAASA
>     is not supported so that it aligns with the rest of the driver and to
>     avoid the issues pointed by Sashiko.
>   * Rework multiple commit messages.
> 
> v1->v2:
>   * Added patch to remove 16-bit addressing support for SPD5118
>   * Guard ACPI calls with #ifdef CONFIG_ACPI
>   * Remove CONFIG_OF guard for of_alias_get_highest_id()
>   * Mask mipi-i3c-static-method in the driver to select only valid values.
>   * Proceed to register other devices if SETAASA is not supported.
>   * Update commit message and links in the description of multiple commits.
> 
> 
> Akhil R (13):
>   dt-bindings: i3c: Add mipi-i3c-static-method to support SETAASA
>   ACPICA: Read LVR from the I2C resource descriptor
>   i3c: master: Use unified device property interface
>   i3c: master: Support ACPI enumeration of child devices
>   i3c: master: Add support for devices using SETAASA
>   i3c: master: Add support for devices without PID
>   i3c: master: match I3C device through DT and ACPI
>   i3c: dw-i3c-master: Add SETAASA as supported CCC
>   i3c: dw-i3c-master: Add a quirk to skip clock and reset
>   i3c: dw-i3c-master: Add ACPI ID for Tegra410
>   hwmon: spd5118: Remove 16-bit addressing
>   hwmon: spd5118: Add I3C support
>   arm64: defconfig: Enable I3C and SPD5118 hwmon
> 

I'd really like to apply this but I would have preferred having an
actual ack from Rob on patch 1. Also, you are going to have to rebase on
the current i3c-next. Can you do this?

Thanks!

>  .../devicetree/bindings/i3c/i3c.yaml          |  31 +-
>  arch/arm64/configs/defconfig                  |   3 +
>  drivers/acpi/acpica/rsserial.c                |   6 +-
>  drivers/hwmon/Kconfig                         |   9 +-
>  drivers/hwmon/spd5118.c                       | 119 +++---
>  drivers/i3c/master.c                          | 354 +++++++++++++++---
>  drivers/i3c/master/dw-i3c-master.c            |  66 ++--
>  include/acpi/acrestyp.h                       |   1 +
>  include/dt-bindings/i3c/i3c.h                 |   3 +
>  include/linux/i3c/ccc.h                       |   1 +
>  include/linux/i3c/master.h                    |  20 +-
>  11 files changed, 463 insertions(+), 150 deletions(-)
> 
> -- 
> 2.50.1
> 
> 
> -- 
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-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com