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hwmon: Add helper to tell if a char is invalid in a name

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HWMON device names are not allowed to contain "-* \t\n". Add a helper
which will return true if passed an invalid character. It can be used
to massage a string into a hwmon compatible name by replacing invalid
characters with '_'.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2018-07-17 21:48:12 +02:00 committed by David S. Miller
parent aa7f29b07c
commit dcb5d0fcaa
1 changed files with 23 additions and 0 deletions
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23
include/linux/hwmon.h
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@ -398,4 +398,27 @@ devm_hwmon_device_register_with_info(struct device *dev,
void hwmon_device_unregister(struct device *dev);
void devm_hwmon_device_unregister(struct device *dev);
/**
* hwmon_is_bad_char - Is the char invalid in a hwmon name
* @ch: the char to be considered
*
* hwmon_is_bad_char() can be used to determine if the given character
* may not be used in a hwmon name.
*
* Returns true if the char is invalid, false otherwise.
*/
static inline bool hwmon_is_bad_char(const char ch)
{
switch (ch) {
case '-':
case '*':
case ' ':
case '\t':
case '\n':
return true;
default:
return false;
}
}
#endif