hwmon: (lm90) enable extended range according to DTS node

Some lm90 compatible devices can operate in an extended temperature mode.
This feature is now enabled if the property is set in the corresponding
device tree node.

Signed-off-by: Holger Brunck <holger.brunck@hitachienergy.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220517135614.8185-2-holger.brunck@hitachienergy.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: Holger Brunck

drivers/hwmon/lm90.c

@@ -1707,6 +1707,7 @@ static void lm90_restore_conf(void *_data)
 
 static int lm90_init_client(struct i2c_client *client, struct lm90_data *data)
 {
+	struct device_node *np = client->dev.of_node;
 	int config, convrate;
 
 	convrate = lm90_read_reg(client, LM90_REG_R_CONVRATE);
@@ -1727,6 +1728,9 @@ static int lm90_init_client(struct i2c_client *client, struct lm90_data *data)
 
 	/* Check Temperature Range Select */
 	if (data->flags & LM90_HAVE_EXTENDED_TEMP) {
+		if (of_property_read_bool(np, "ti,extended-range-enable"))
+			config |= 0x04;
+
 		if (config & 0x04)
 			data->flags |= LM90_FLAG_ADT7461_EXT;
 	}