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hwmon: (core) Add support for string attributes to new API

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The new API is so far only suited for data attributes and does not work
well for string attributes, specifically for the 'label' attributes.
Provide a separate callback function for those.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2016-08-07 20:51:25 -07:00
parent f680b28456
commit e159ab5cb1
2 changed files with 48 additions and 4 deletions
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19
include/linux/hwmon.h
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@ -298,7 +298,8 @@ enum hwmon_pwm_attributes {
* Channel number
* The function returns the file permissions.
* If the return value is 0, no attribute will be created.
* @read: Read callback. Mandatory if readable attributes are present.
* @read: Read callback for data attributes. Mandatory if readable
* data attributes are present.
* Parameters are:
* @dev: Pointer to hardware monitoring device
* @type: Sensor type
@ -307,7 +308,19 @@ enum hwmon_pwm_attributes {
* Channel number
* @val: Pointer to returned value
* The function returns 0 on success or a negative error number.
* @write: Write callback. Mandatory if writeable attributes are present.
* @read_string:
* Read callback for string attributes. Mandatory if string
* attributes are present.
* Parameters are:
* @dev: Pointer to hardware monitoring device
* @type: Sensor type
* @attr: Sensor attribute
* @channel:
* Channel number
* @str: Pointer to returned string
* The function returns 0 on success or a negative error number.
* @write: Write callback for data attributes. Mandatory if writeable
* data attributes are present.
* Parameters are:
* @dev: Pointer to hardware monitoring device
* @type: Sensor type
@ -322,6 +335,8 @@ struct hwmon_ops {
u32 attr, int channel);
int (*read)(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val);
int (*read_string)(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, char **str);
int (*write)(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val);
};