[PATCH 6.12 046/244] i3c: master: dw-i3c: Fix missing of_node for virtual I2C adapter

Greg Kroah-Hartman
2026-03-31T16:48:01Z

From: Peter Yin <peteryin.openbmc@gmail.com>

[ Upstream commit f26ecaa0f0abfe5db173416214098a00d3b7db79 ]

The DesignWare I3C master driver creates a virtual I2C adapter to
provide backward compatibility with I2C devices. However, the current
implementation does not associate this virtual adapter with any
Device Tree node.

Propagate the of_node from the I3C master platform device to the
virtual I2C adapter's device structure. This ensures that standard
I2C aliases are correctly resolved and bus numbering remains consistent.

Signed-off-by: Peter Yin <peteryin.openbmc@gmail.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260302075645.1492766-1-peteryin.openbmc@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/i3c/master/dw-i3c-master.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index e0853a6bde0a4..3453431e49a24 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -1606,6 +1606,8 @@ int dw_i3c_common_probe(struct dw_i3c_master *master,
master->free_pos = GENMASK(master->maxdevs - 1, 0);

INIT_WORK(&master->hj_work, dw_i3c_hj_work);
+
+ device_set_of_node_from_dev(&master->base.i2c.dev, &pdev->dev);
ret = i3c_master_register(&master->base, &pdev->dev,
&dw_mipi_i3c_ops, false);
if (ret)
--
2.51.0