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

Akhil R
2026-04-09T11:00:13Z

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 <akhilrajeev@nvidia.com>
---
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