hwmon: Update documentation to clarify rules for the 'name' attribute

Clarify that the name attribute must report a valid name, and the rules
for valid names. Also clarify that the name parameter must be provided
for all supported API functions.
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Documentation/hwmon/hwmon-kernel-api.txt

@@ -89,6 +89,10 @@ the call to devm_hwmon_device_register_with_groups or
 hwmon_device_register_with_info and if the automatic (device managed)
 removal would be too late.
 
+All supported hwmon device registration functions only accept valid device
+names. Device names including invalid characters (whitespace, '*', or '-')
+will be rejected. The 'name' parameter is mandatory.
+
 Using devm_hwmon_device_register_with_info()
 --------------------------------------------
 

Documentation/hwmon/sysfs-interface

@@ -86,8 +86,9 @@ given driver if the chip has the feature.
 
 name		The chip name.
 		This should be a short, lowercase string, not containing
-		spaces nor dashes, representing the chip name. This is
-		the only mandatory attribute.
+		whitespace, dashes, or the wildcard character '*'.
+		This attribute represents the chip name. It is the only
+		mandatory attribute.
 		I2C devices get this attribute created automatically.
 		RO