[PATCH] i3c: master: Improve initialization of numbered I2C adapters

Defa Li defa.li at mediatek.com
Thu Dec 5 05:29:02 PST 2024


Add logic to initialize I2C adapters with a specific ID if available,
improving device identification and configuration.

Signed-off-by: Defa Li <defa.li at mediatek.com>
---
 drivers/i3c/master.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 42310c9a00c2..a838cdbb897b 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -2486,7 +2486,7 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master)
 	struct i2c_adapter *adap = i3c_master_to_i2c_adapter(master);
 	struct i2c_dev_desc *i2cdev;
 	struct i2c_dev_boardinfo *i2cboardinfo;
-	int ret;
+	int ret, id = -ENODEV;
 
 	adap->dev.parent = master->dev.parent;
 	adap->owner = master->dev.parent->driver->owner;
@@ -2497,7 +2497,14 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master)
 	adap->timeout = 1000;
 	adap->retries = 3;
 
-	ret = i2c_add_adapter(adap);
+	if (master->dev.of_node)
+		id = of_alias_get_id(master->dev.of_node, "i2c");
+
+	if (id >= 0) {
+		adap->nr = id;
+		ret = i2c_add_numbered_adapter(adap);
+	} else
+		ret = i2c_add_adapter(adap);
 	if (ret)
 		return ret;
 
-- 
2.45.2




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