[PATCH v3 3/4] i2c: designware: Convert platform driver to use shutdown hook

William A. Kennington III
2026-05-04T20:15:06Z

Convert the platform driver to use the new i2c_dw_shutdown() hook,
allowing the controller to gracefully NACK master requests during
system shutdown.

Signed-off-by: William A. Kennington III <william@wkennington.com>
---
drivers/i2c/busses/i2c-designware-platdrv.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 3351c4a9ef11..7ff7c1631e64 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -289,9 +289,22 @@ static const struct platform_device_id dw_i2c_platform_ids[] = {
};
MODULE_DEVICE_TABLE(platform, dw_i2c_platform_ids);

+static void dw_i2c_plat_shutdown(struct platform_device *pdev)
+{
+ struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev);
+
+ if (!i_dev)
+ return;
+
+ pm_runtime_disable(&pdev->dev);
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ i2c_dw_shutdown(i_dev);
+}
+
static struct platform_driver dw_i2c_driver = {
.probe = dw_i2c_plat_probe,
.remove = dw_i2c_plat_remove,
+ .shutdown = dw_i2c_plat_shutdown,
.driver = {
.name = "i2c_designware",
.of_match_table = dw_i2c_of_match,

--
2.54.0.545.g6539524ca2-goog