Re: [PATCH v2 07/13] i3c: master: match I3C device through DT and ACPI

On Thu, Apr 09, 2026 at 04:27:37PM +0530, Akhil R wrote:
> SETAASA based devices cannot always be identified by PID or DCR; the
> standard I3C id_table matching may not be applicable. Allow such devices
> to be matched through Device Tree or ACPI
>
> Signed-off-by: Akhil R <[email protected]>
> ---

Reviewed-by: Frank Li <[email protected]>
>  drivers/i3c/master.c | 20 +++++++++++++++++++-
>  1 file changed, 19 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
> index 324a0440724e..f9f682a881be 100644
> --- a/drivers/i3c/master.c
> +++ b/drivers/i3c/master.c
> @@ -16,6 +16,7 @@
>  #include <linux/kernel.h>
>  #include <linux/list.h>
>  #include <linux/of.h>
> +#include <linux/of_device.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/property.h>
>  #include <linux/slab.h>
> @@ -342,15 +343,32 @@ static int i3c_device_match(struct device *dev, const struct device_driver *drv)
>  {
>  	struct i3c_device *i3cdev;
>  	const struct i3c_driver *i3cdrv;
> +	u8 static_addr_method = 0;
>
>  	if (dev->type != &i3c_device_type)
>  		return 0;
>
>  	i3cdev = dev_to_i3cdev(dev);
>  	i3cdrv = drv_to_i3cdrv(drv);
> -	if (i3c_device_match_id(i3cdev, i3cdrv->id_table))
> +
> +	if (i3cdev->desc && i3cdev->desc->boardinfo)
> +		static_addr_method = i3cdev->desc->boardinfo->static_addr_method;
> +
> +	/*
> +	 * SETAASA based device need not always have a matching ID since
> +	 * it is not mandatory for such devices to implement deviceinfo
> +	 * CCC commands. Allow them to register through DT or ACPI.
> +	 */
> +	if (i3cdrv->id_table && i3c_device_match_id(i3cdev, i3cdrv->id_table))
>  		return 1;
>
> +	if (static_addr_method & I3C_ADDR_METHOD_SETAASA) {
> +		if (of_driver_match_device(dev, drv))
> +			return 1;
> +		if (acpi_driver_match_device(dev, drv))
> +			return 1;
> +	}
> +
>  	return 0;
>  }
>
> --
> 2.50.1
>