Merge tag 'i2c-for-6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

torvalds · torvalds · commit 81ff855485a3 · 2023-03-11T09:24:05.000-08:00
Pull i2c updates from Wolfram Sang:
 "This marks the end of a transition to let I2C have the same probe
  semantics as other subsystems. Uwe took care that no drivers in the
  current tree nor in -next use the deprecated .probe call. So, it is a
  good time to switch to the new, standard semantics now.

  There is also a regression fix:

   - regression fix for the notifier handling of the I2C core

   - final coversions of drivers away from deprecated .probe

   - make .probe_new the standard probe and convert I2C core to use it

* tag 'i2c-for-6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: dev: Fix bus callback return values
  i2c: Convert drivers to new .probe() callback
  i2c: mux: Convert all drivers to new .probe() callback
  i2c: Switch .probe() to not take an id parameter
  media: i2c: ov2685: convert to i2c's .probe_new()
  media: i2c: ov5695: convert to i2c's .probe_new()
  w1: ds2482: Convert to i2c's .probe_new()
  serial: sc16is7xx: Convert to i2c's .probe_new()
  mtd: maps: pismo: Convert to i2c's .probe_new()
  misc: ad525x_dpot-i2c: Convert to i2c's .probe_new()
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
@@ -561,15 +561,8 @@ static int i2c_device_probe(struct device *dev)
 		goto err_detach_pm_domain;
 	}
 
-	/*
-	 * When there are no more users of probe(),
-	 * rename probe_new to probe.
-	 */
-	if (driver->probe_new)
-		status = driver->probe_new(client);
-	else if (driver->probe)
-		status = driver->probe(client,
-				       i2c_match_id(driver->id_table, client));
+	if (driver->probe)
+		status = driver->probe(client);
 	else
 		status = -EINVAL;
 
@@ -1057,7 +1050,7 @@ static int dummy_probe(struct i2c_client *client)
 
 static struct i2c_driver dummy_driver = {
 	.driver.name	= "dummy",
-	.probe_new	= dummy_probe,
+	.probe		= dummy_probe,
 	.id_table	= dummy_id,
 };
 
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
@@ -646,7 +646,7 @@ static void i2cdev_dev_release(struct device *dev)
 	kfree(i2c_dev);
 }
 
-static int i2cdev_attach_adapter(struct device *dev, void *dummy)
+static int i2cdev_attach_adapter(struct device *dev)
 {
 	struct i2c_adapter *adap;
 	struct i2c_dev *i2c_dev;
@@ -685,7 +685,7 @@ static int i2cdev_attach_adapter(struct device *dev, void *dummy)
 	return NOTIFY_DONE;
 }
 
-static int i2cdev_detach_adapter(struct device *dev, void *dummy)
+static int i2cdev_detach_adapter(struct device *dev)
 {
 	struct i2c_adapter *adap;
 	struct i2c_dev *i2c_dev;
@@ -711,9 +711,9 @@ static int i2cdev_notifier_call(struct notifier_block *nb, unsigned long action,
 
 	switch (action) {
 	case BUS_NOTIFY_ADD_DEVICE:
-		return i2cdev_attach_adapter(dev, NULL);
+		return i2cdev_attach_adapter(dev);
 	case BUS_NOTIFY_DEL_DEVICE:
-		return i2cdev_detach_adapter(dev, NULL);
+		return i2cdev_detach_adapter(dev);
 	}
 
 	return NOTIFY_DONE;
@@ -725,6 +725,18 @@ static struct notifier_block i2cdev_notifier = {
 
 /* ------------------------------------------------------------------------- */
 
+static int __init i2c_dev_attach_adapter(struct device *dev, void *dummy)
+{
+	i2cdev_attach_adapter(dev);
+	return 0;
+}
+
+static int __exit i2c_dev_detach_adapter(struct device *dev, void *dummy)
+{
+	i2cdev_detach_adapter(dev);
+	return 0;
+}
+
 /*
  * module load/unload record keeping
  */
@@ -752,7 +764,7 @@ static int __init i2c_dev_init(void)
 		goto out_unreg_class;
 
 	/* Bind to already existing adapters right away */
-	i2c_for_each_dev(NULL, i2cdev_attach_adapter);
+	i2c_for_each_dev(NULL, i2c_dev_attach_adapter);
 
 	return 0;
 
@@ -768,7 +780,7 @@ static int __init i2c_dev_init(void)
 static void __exit i2c_dev_exit(void)
 {
 	bus_unregister_notifier(&i2c_bus_type, &i2cdev_notifier);
-	i2c_for_each_dev(NULL, i2cdev_detach_adapter);
+	i2c_for_each_dev(NULL, i2c_dev_detach_adapter);
 	class_destroy(i2c_dev_class);
 	unregister_chrdev_region(MKDEV(I2C_MAJOR, 0), I2C_MINORS);
 }
diff --git a/drivers/i2c/i2c-slave-eeprom.c b/drivers/i2c/i2c-slave-eeprom.c
@@ -207,7 +207,7 @@ static struct i2c_driver i2c_slave_eeprom_driver = {
 	.driver = {
 		.name = "i2c-slave-eeprom",
 	},
-	.probe_new = i2c_slave_eeprom_probe,
+	.probe = i2c_slave_eeprom_probe,
 	.remove = i2c_slave_eeprom_remove,
 	.id_table = i2c_slave_eeprom_id,
 };
diff --git a/drivers/i2c/i2c-slave-testunit.c b/drivers/i2c/i2c-slave-testunit.c
@@ -171,7 +171,7 @@ static struct i2c_driver i2c_slave_testunit_driver = {
 	.driver = {
 		.name = "i2c-slave-testunit",
 	},
-	.probe_new = i2c_slave_testunit_probe,
+	.probe = i2c_slave_testunit_probe,
 	.remove = i2c_slave_testunit_remove,
 	.id_table = i2c_slave_testunit_id,
 };
diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c
@@ -169,7 +169,7 @@ static struct i2c_driver smbalert_driver = {
 	.driver = {
 		.name	= "smbus_alert",
 	},
-	.probe_new	= smbalert_probe,
+	.probe		= smbalert_probe,
 	.remove		= smbalert_remove,
 	.id_table	= smbalert_ids,
 };
diff --git a/drivers/i2c/muxes/i2c-mux-ltc4306.c b/drivers/i2c/muxes/i2c-mux-ltc4306.c
@@ -306,7 +306,7 @@ static struct i2c_driver ltc4306_driver = {
 		.name	= "ltc4306",
 		.of_match_table = of_match_ptr(ltc4306_of_match),
 	},
-	.probe_new	= ltc4306_probe,
+	.probe		= ltc4306_probe,
 	.remove		= ltc4306_remove,
 	.id_table	= ltc4306_id,
 };
diff --git a/drivers/i2c/muxes/i2c-mux-pca9541.c b/drivers/i2c/muxes/i2c-mux-pca9541.c
@@ -336,7 +336,7 @@ static struct i2c_driver pca9541_driver = {
 		   .name = "pca9541",
 		   .of_match_table = of_match_ptr(pca9541_of_match),
 		   },
-	.probe_new = pca9541_probe,
+	.probe = pca9541_probe,
 	.remove = pca9541_remove,
 	.id_table = pca9541_id,
 };
diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c
@@ -554,7 +554,7 @@ static struct i2c_driver pca954x_driver = {
 		.pm	= &pca954x_pm,
 		.of_match_table = pca954x_of_match,
 	},
-	.probe_new	= pca954x_probe,
+	.probe		= pca954x_probe,
 	.remove		= pca954x_remove,
 	.id_table	= pca954x_id,
 };
diff --git a/drivers/media/i2c/ov2685.c b/drivers/media/i2c/ov2685.c
@@ -707,8 +707,7 @@ static int ov2685_configure_regulators(struct ov2685 *ov2685)
 				       ov2685->supplies);
 }
 
-static int ov2685_probe(struct i2c_client *client,
-			const struct i2c_device_id *id)
+static int ov2685_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
 	struct ov2685 *ov2685;
@@ -830,7 +829,7 @@ static struct i2c_driver ov2685_i2c_driver = {
 		.pm = &ov2685_pm_ops,
 		.of_match_table = of_match_ptr(ov2685_of_match),
 	},
-	.probe		= &ov2685_probe,
+	.probe_new	= &ov2685_probe,
 	.remove		= &ov2685_remove,
 };
 
diff --git a/drivers/media/i2c/ov5695.c b/drivers/media/i2c/ov5695.c
@@ -1267,8 +1267,7 @@ static int ov5695_configure_regulators(struct ov5695 *ov5695)
 				       ov5695->supplies);
 }
 
-static int ov5695_probe(struct i2c_client *client,
-			const struct i2c_device_id *id)
+static int ov5695_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
 	struct ov5695 *ov5695;
@@ -1393,7 +1392,7 @@ static struct i2c_driver ov5695_i2c_driver = {
 		.pm = &ov5695_pm_ops,
 		.of_match_table = of_match_ptr(ov5695_of_match),
 	},
-	.probe		= &ov5695_probe,
+	.probe_new	= &ov5695_probe,
 	.remove		= &ov5695_remove,
 };
 
diff --git a/drivers/misc/ad525x_dpot-i2c.c b/drivers/misc/ad525x_dpot-i2c.c
@@ -50,9 +50,9 @@ static const struct ad_dpot_bus_ops bops = {
 	.write_r8d16	= write_r8d16,
 };
 
-static int ad_dpot_i2c_probe(struct i2c_client *client,
-				      const struct i2c_device_id *id)
+static int ad_dpot_i2c_probe(struct i2c_client *client)
 {
+	const struct i2c_device_id *id = i2c_client_get_device_id(client);
 	struct ad_dpot_bus_data bdata = {
 		.client = client,
 		.bops = &bops,
@@ -106,7 +106,7 @@ static struct i2c_driver ad_dpot_i2c_driver = {
 	.driver = {
 		.name	= "ad_dpot",
 	},
-	.probe		= ad_dpot_i2c_probe,
+	.probe_new	= ad_dpot_i2c_probe,
 	.remove		= ad_dpot_i2c_remove,
 	.id_table	= ad_dpot_id,
 };
diff --git a/drivers/mtd/maps/pismo.c b/drivers/mtd/maps/pismo.c
@@ -206,8 +206,7 @@ static void pismo_remove(struct i2c_client *client)
 	kfree(pismo);
 }
 
-static int pismo_probe(struct i2c_client *client,
-		       const struct i2c_device_id *id)
+static int pismo_probe(struct i2c_client *client)
 {
 	struct pismo_pdata *pdata = client->dev.platform_data;
 	struct pismo_eeprom eeprom;
@@ -260,7 +259,7 @@ static struct i2c_driver pismo_driver = {
 	.driver	= {
 		.name	= "pismo",
 	},
-	.probe		= pismo_probe,
+	.probe_new	= pismo_probe,
 	.remove		= pismo_remove,
 	.id_table	= pismo_id,
 };
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
@@ -1666,9 +1666,9 @@ MODULE_ALIAS("spi:sc16is7xx");
 #endif
 
 #ifdef CONFIG_SERIAL_SC16IS7XX_I2C
-static int sc16is7xx_i2c_probe(struct i2c_client *i2c,
-			       const struct i2c_device_id *id)
+static int sc16is7xx_i2c_probe(struct i2c_client *i2c)
 {
+	const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
 	const struct sc16is7xx_devtype *devtype;
 	struct regmap *regmap;
 
@@ -1709,7 +1709,7 @@ static struct i2c_driver sc16is7xx_i2c_uart_driver = {
 		.name		= SC16IS7XX_NAME,
 		.of_match_table	= sc16is7xx_dt_ids,
 	},
-	.probe		= sc16is7xx_i2c_probe,
+	.probe_new	= sc16is7xx_i2c_probe,
 	.remove		= sc16is7xx_i2c_remove,
 	.id_table	= sc16is7xx_i2c_id_table,
 };
diff --git a/drivers/w1/masters/ds2482.c b/drivers/w1/masters/ds2482.c
@@ -442,8 +442,7 @@ static u8 ds2482_w1_set_pullup(void *data, int delay)
 }
 
 
-static int ds2482_probe(struct i2c_client *client,
-			const struct i2c_device_id *id)
+static int ds2482_probe(struct i2c_client *client)
 {
 	struct ds2482_data *data;
 	int err = -ENODEV;
@@ -553,7 +552,7 @@ static struct i2c_driver ds2482_driver = {
 	.driver = {
 		.name	= "ds2482",
 	},
-	.probe		= ds2482_probe,
+	.probe_new	= ds2482_probe,
 	.remove		= ds2482_remove,
 	.id_table	= ds2482_id,
 };
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
@@ -236,8 +236,8 @@ enum i2c_driver_flags {
 /**
  * struct i2c_driver - represent an I2C device driver
  * @class: What kind of i2c device we instantiate (for detect)
- * @probe: Callback for device binding - soon to be deprecated
- * @probe_new: New callback for device binding
+ * @probe: Callback for device binding
+ * @probe_new: Transitional callback for device binding - do not use
  * @remove: Callback for device unbinding
  * @shutdown: Callback for device shutdown
  * @alert: Alert callback, for example for the SMBus alert protocol
@@ -272,14 +272,18 @@ enum i2c_driver_flags {
 struct i2c_driver {
 	unsigned int class;
 
+	union {
 	/* Standard driver model interfaces */
-	int (*probe)(struct i2c_client *client, const struct i2c_device_id *id);
+		int (*probe)(struct i2c_client *client);
+		/*
+		 * Legacy callback that was part of a conversion of .probe().
+		 * Today it has the same semantic as .probe(). Don't use for new
+		 * code.
+		 */
+		int (*probe_new)(struct i2c_client *client);
+	};
 	void (*remove)(struct i2c_client *client);
 
-	/* New driver model interface to aid the seamless removal of the
-	 * current probe()'s, more commonly unused than used second parameter.
-	 */
-	int (*probe_new)(struct i2c_client *client);
 
 	/* driver model interfaces that don't relate to enumeration  */
 	void (*shutdown)(struct i2c_client *client);
