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