--- zzzz-none-000/linux-2.6.39.4/drivers/i2c/i2c-dev.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/drivers/i2c/i2c-dev.c	2021-11-10 13:23:10.000000000 +0000
@@ -442,6 +442,12 @@
 	case I2C_SMBUS:
 		return i2cdev_ioctl_smbus(client, arg);
 
+#ifdef CONFIG_GEN3_I2C
+	case I2C_SET_MODE:
+		client->adapter->mode = arg;
+		break;
+#endif
+
 	case I2C_RETRIES:
 		client->adapter->retries = arg;
 		break;