[PATCH v5 06/12] i3c: master: match I3C device through DT and ACPI

[Akhil R]

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
match through Device Tree or ACPI.

Emit OF and ACPI modaliases so firmware-matched devices can autoload their
drivers.

Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
Signed-off-by: Akhil R <akhilrajeev@xxxxxxxxxx>
---
 drivers/i3c/master.c | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index bd0dc76c7ba1..f513169ac395 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -19,6 +19,7 @@
 #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>
@@ -320,6 +321,15 @@ static int i3c_device_uevent(const struct device *dev, struct kobj_uevent_env *e
 	const struct i3c_device *i3cdev = dev_to_i3cdev(dev);
 	struct i3c_device_info devinfo;
 	u16 manuf, part, ext;
+	int rc;
+
+	rc = of_device_uevent_modalias(dev, env);
+	if (rc != -ENODEV)
+		return rc;
+
+	rc = acpi_device_uevent_modalias(dev, env);
+	if (rc != -ENODEV)
+		return rc;
 
 	if (i3cdev->desc)
 		devinfo = i3cdev->desc->info;
@@ -345,15 +355,32 @@ 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 devices 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;
 }
 
-- 
2.43.0