--- zzzz-none-000/linux-3.10.107/drivers/hwmon/tmp421.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/hwmon/tmp421.c	2021-02-04 17:41:59.000000000 +0000
@@ -13,15 +13,11 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /*
  * Driver for the Texas Instruments TMP421 SMBus temperature sensor IC.
- * Supported models: TMP421, TMP422, TMP423
+ * Supported models: TMP421, TMP422, TMP423, TMP441, TMP442
  */
 
 #include <linux/module.h>
@@ -39,9 +35,10 @@
 static const unsigned short normal_i2c[] = { 0x2a, 0x4c, 0x4d, 0x4e, 0x4f,
 					     I2C_CLIENT_END };
 
-enum chips { tmp421, tmp422, tmp423 };
+enum chips { tmp421, tmp422, tmp423, tmp441, tmp442 };
 
 /* The TMP421 registers */
+#define TMP421_STATUS_REG			0x08
 #define TMP421_CONFIG_REG_1			0x09
 #define TMP421_CONVERSION_RATE_REG		0x0B
 #define TMP421_MANUFACTURER_ID_REG		0xFE
@@ -59,17 +56,21 @@
 #define TMP421_DEVICE_ID			0x21
 #define TMP422_DEVICE_ID			0x22
 #define TMP423_DEVICE_ID			0x23
+#define TMP441_DEVICE_ID			0x41
+#define TMP442_DEVICE_ID			0x42
 
 static const struct i2c_device_id tmp421_id[] = {
 	{ "tmp421", 2 },
 	{ "tmp422", 3 },
 	{ "tmp423", 4 },
+	{ "tmp441", 2 },
+	{ "tmp442", 3 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, tmp421_id);
 
 struct tmp421_data {
-	struct device *hwmon_dev;
+	struct i2c_client *client;
 	struct mutex update_lock;
 	char valid;
 	unsigned long last_updated;
@@ -99,8 +100,8 @@
 
 static struct tmp421_data *tmp421_update_device(struct device *dev)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct tmp421_data *data = i2c_get_clientdata(client);
+	struct tmp421_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
 	int i;
 
 	mutex_lock(&data->update_lock);
@@ -198,6 +199,11 @@
 	.is_visible = tmp421_is_visible,
 };
 
+static const struct attribute_group *tmp421_groups[] = {
+	&tmp421_group,
+	NULL
+};
+
 static int tmp421_init_client(struct i2c_client *client)
 {
 	int config, config_orig;
@@ -210,7 +216,7 @@
 	if (config < 0) {
 		dev_err(&client->dev,
 			"Could not read configuration register (%d)\n", config);
-		return -ENODEV;
+		return config;
 	}
 
 	config_orig = config;
@@ -229,7 +235,9 @@
 {
 	enum chips kind;
 	struct i2c_adapter *adapter = client->adapter;
-	const char *names[] = { "TMP421", "TMP422", "TMP423" };
+	const char * const names[] = { "TMP421", "TMP422", "TMP423",
+				       "TMP441", "TMP442" };
+	int addr = client->addr;
 	u8 reg;
 
 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
@@ -239,17 +247,37 @@
 	if (reg != TMP421_MANUFACTURER_ID)
 		return -ENODEV;
 
+	reg = i2c_smbus_read_byte_data(client, TMP421_CONVERSION_RATE_REG);
+	if (reg & 0xf8)
+		return -ENODEV;
+
+	reg = i2c_smbus_read_byte_data(client, TMP421_STATUS_REG);
+	if (reg & 0x7f)
+		return -ENODEV;
+
 	reg = i2c_smbus_read_byte_data(client, TMP421_DEVICE_ID_REG);
 	switch (reg) {
 	case TMP421_DEVICE_ID:
 		kind = tmp421;
 		break;
 	case TMP422_DEVICE_ID:
+		if (addr == 0x2a)
+			return -ENODEV;
 		kind = tmp422;
 		break;
 	case TMP423_DEVICE_ID:
+		if (addr != 0x4c && addr != 0x4d)
+			return -ENODEV;
 		kind = tmp423;
 		break;
+	case TMP441_DEVICE_ID:
+		kind = tmp441;
+		break;
+	case TMP442_DEVICE_ID:
+		if (addr != 0x4c && addr != 0x4d)
+			return -ENODEV;
+		kind = tmp442;
+		break;
 	default:
 		return -ENODEV;
 	}
@@ -264,47 +292,26 @@
 static int tmp421_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
+	struct device *dev = &client->dev;
+	struct device *hwmon_dev;
 	struct tmp421_data *data;
 	int err;
 
-	data = devm_kzalloc(&client->dev, sizeof(struct tmp421_data),
-			    GFP_KERNEL);
+	data = devm_kzalloc(dev, sizeof(struct tmp421_data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
 
-	i2c_set_clientdata(client, data);
 	mutex_init(&data->update_lock);
 	data->channels = id->driver_data;
+	data->client = client;
 
 	err = tmp421_init_client(client);
 	if (err)
 		return err;
 
-	err = sysfs_create_group(&client->dev.kobj, &tmp421_group);
-	if (err)
-		return err;
-
-	data->hwmon_dev = hwmon_device_register(&client->dev);
-	if (IS_ERR(data->hwmon_dev)) {
-		err = PTR_ERR(data->hwmon_dev);
-		data->hwmon_dev = NULL;
-		goto exit_remove;
-	}
-	return 0;
-
-exit_remove:
-	sysfs_remove_group(&client->dev.kobj, &tmp421_group);
-	return err;
-}
-
-static int tmp421_remove(struct i2c_client *client)
-{
-	struct tmp421_data *data = i2c_get_clientdata(client);
-
-	hwmon_device_unregister(data->hwmon_dev);
-	sysfs_remove_group(&client->dev.kobj, &tmp421_group);
-
-	return 0;
+	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+							   data, tmp421_groups);
+	return PTR_ERR_OR_ZERO(hwmon_dev);
 }
 
 static struct i2c_driver tmp421_driver = {
@@ -313,7 +320,6 @@
 		.name	= "tmp421",
 	},
 	.probe = tmp421_probe,
-	.remove = tmp421_remove,
 	.id_table = tmp421_id,
 	.detect = tmp421_detect,
 	.address_list = normal_i2c,
@@ -322,5 +328,5 @@
 module_i2c_driver(tmp421_driver);
 
 MODULE_AUTHOR("Andre Prendel <andre.prendel@gmx.de>");
-MODULE_DESCRIPTION("Texas Instruments TMP421/422/423 temperature sensor driver");
+MODULE_DESCRIPTION("Texas Instruments TMP421/422/423/441/442 temperature sensor driver");
 MODULE_LICENSE("GPL");